./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 20:28:44,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:28:44,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:28:44,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:28:44,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:28:44,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:28:44,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:28:44,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:28:44,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:28:44,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:28:44,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:28:44,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:28:44,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:28:44,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:28:44,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:28:44,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:28:44,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:28:44,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:28:44,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:28:44,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:28:44,077 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:28:44,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:28:44,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:28:44,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:28:44,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:28:44,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:28:44,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:28:44,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:28:44,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:28:44,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:28:44,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:28:44,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:28:44,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:28:44,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:28:44,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:28:44,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:28:44,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:28:44,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:28:44,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:28:44,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:28:44,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:28:44,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:28:44,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:28:44,118 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:28:44,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:28:44,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:28:44,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:28:44,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:28:44,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:28:44,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:28:44,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:28:44,121 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:28:44,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:28:44,122 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:28:44,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:28:44,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:28:44,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:28:44,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:28:44,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:28:44,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:28:44,123 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:28:44,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:28:44,124 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:28:44,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:28:44,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:28:44,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:28:44,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:28:44,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:28:44,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:28:44,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:28:44,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:28:44,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:28:44,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:28:44,126 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:28:44,126 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:28:44,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:28:44,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a145625a0fe2baedf73b7a84d58038ade27f8470c6f09a0f78d8ec75fe662acb [2022-07-19 20:28:44,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:28:44,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:28:44,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:28:44,304 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:28:44,305 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:28:44,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-07-19 20:28:44,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b1945262/061f4d562dbf4463b68c8a2a3bd271ae/FLAGc50023e15 [2022-07-19 20:28:44,721 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:28:44,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-07-19 20:28:44,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b1945262/061f4d562dbf4463b68c8a2a3bd271ae/FLAGc50023e15 [2022-07-19 20:28:44,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b1945262/061f4d562dbf4463b68c8a2a3bd271ae [2022-07-19 20:28:44,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:28:44,742 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:28:44,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:28:44,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:28:44,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:28:44,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:28:44" (1/1) ... [2022-07-19 20:28:44,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df4247c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:44, skipping insertion in model container [2022-07-19 20:28:44,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:28:44" (1/1) ... [2022-07-19 20:28:44,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:28:44,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:28:44,927 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2022-07-19 20:28:44,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2022-07-19 20:28:44,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:28:44,997 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:28:45,011 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[913,926] [2022-07-19 20:28:45,022 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.02.cil-2.c[5977,5990] [2022-07-19 20:28:45,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:28:45,069 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:28:45,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45 WrapperNode [2022-07-19 20:28:45,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:28:45,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:28:45,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:28:45,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:28:45,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,113 INFO L137 Inliner]: procedures = 52, calls = 55, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 480 [2022-07-19 20:28:45,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:28:45,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:28:45,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:28:45,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:28:45,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:28:45,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:28:45,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:28:45,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:28:45,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (1/1) ... [2022-07-19 20:28:45,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:28:45,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:45,191 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) [2022-07-19 20:28:45,200 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 [2022-07-19 20:28:45,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:28:45,217 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-19 20:28:45,217 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-19 20:28:45,217 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-19 20:28:45,217 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-19 20:28:45,217 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-19 20:28:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-19 20:28:45,218 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-19 20:28:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-19 20:28:45,218 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-19 20:28:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-19 20:28:45,218 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-19 20:28:45,218 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-19 20:28:45,218 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-19 20:28:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-19 20:28:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:28:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-19 20:28:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-19 20:28:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:28:45,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:28:45,219 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-19 20:28:45,220 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-19 20:28:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-19 20:28:45,220 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-19 20:28:45,303 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:28:45,311 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:28:45,598 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:28:45,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:28:45,614 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-07-19 20:28:45,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:28:45 BoogieIcfgContainer [2022-07-19 20:28:45,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:28:45,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:28:45,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:28:45,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:28:45,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:28:44" (1/3) ... [2022-07-19 20:28:45,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2f768d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:28:45, skipping insertion in model container [2022-07-19 20:28:45,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:28:45" (2/3) ... [2022-07-19 20:28:45,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2f768d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:28:45, skipping insertion in model container [2022-07-19 20:28:45,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:28:45" (3/3) ... [2022-07-19 20:28:45,623 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.02.cil-2.c [2022-07-19 20:28:45,632 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:28:45,633 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 20:28:45,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:28:45,701 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7fd040cf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5495a01b [2022-07-19 20:28:45,701 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:28:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 175 states have (on average 1.5771428571428572) internal successors, (276), 182 states have internal predecessors, (276), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-19 20:28:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 20:28:45,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:45,727 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, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:45,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:45,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2045589042, now seen corresponding path program 1 times [2022-07-19 20:28:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:45,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242061004] [2022-07-19 20:28:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:45,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 20:28:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:46,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:46,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242061004] [2022-07-19 20:28:46,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242061004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:46,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:46,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:28:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216663232] [2022-07-19 20:28:46,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:46,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:28:46,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:46,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:28:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:28:46,043 INFO L87 Difference]: Start difference. First operand has 212 states, 175 states have (on average 1.5771428571428572) internal successors, (276), 182 states have internal predecessors, (276), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:28:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:46,249 INFO L93 Difference]: Finished difference Result 478 states and 736 transitions. [2022-07-19 20:28:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:28:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-19 20:28:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:46,264 INFO L225 Difference]: With dead ends: 478 [2022-07-19 20:28:46,265 INFO L226 Difference]: Without dead ends: 271 [2022-07-19 20:28:46,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:28:46,273 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 357 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:46,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 551 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:28:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-19 20:28:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 265. [2022-07-19 20:28:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 224 states have (on average 1.4419642857142858) internal successors, (323), 229 states have internal predecessors, (323), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (30), 24 states have call predecessors, (30), 24 states have call successors, (30) [2022-07-19 20:28:46,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 381 transitions. [2022-07-19 20:28:46,323 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 381 transitions. Word has length 44 [2022-07-19 20:28:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:46,324 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 381 transitions. [2022-07-19 20:28:46,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:28:46,324 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 381 transitions. [2022-07-19 20:28:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 20:28:46,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:46,327 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:46,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:28:46,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:46,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:46,328 INFO L85 PathProgramCache]: Analyzing trace with hash 899257869, now seen corresponding path program 1 times [2022-07-19 20:28:46,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:46,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602821067] [2022-07-19 20:28:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:46,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 20:28:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:46,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:46,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602821067] [2022-07-19 20:28:46,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602821067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:46,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:46,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:28:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101689173] [2022-07-19 20:28:46,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:46,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:28:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:46,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:28:46,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:28:46,386 INFO L87 Difference]: Start difference. First operand 265 states and 381 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:28:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:46,567 INFO L93 Difference]: Finished difference Result 513 states and 721 transitions. [2022-07-19 20:28:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:28:46,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-19 20:28:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:46,574 INFO L225 Difference]: With dead ends: 513 [2022-07-19 20:28:46,574 INFO L226 Difference]: Without dead ends: 389 [2022-07-19 20:28:46,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:28:46,578 INFO L413 NwaCegarLoop]: 336 mSDtfsCounter, 169 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:46,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 680 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:28:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-19 20:28:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 332. [2022-07-19 20:28:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 285 states have (on average 1.4280701754385965) internal successors, (407), 290 states have internal predecessors, (407), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (33), 27 states have call predecessors, (33), 27 states have call successors, (33) [2022-07-19 20:28:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 471 transitions. [2022-07-19 20:28:46,621 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 471 transitions. Word has length 45 [2022-07-19 20:28:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:46,622 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 471 transitions. [2022-07-19 20:28:46,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:28:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 471 transitions. [2022-07-19 20:28:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 20:28:46,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:46,624 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:46,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:28:46,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash -385099592, now seen corresponding path program 1 times [2022-07-19 20:28:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:46,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022174999] [2022-07-19 20:28:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:46,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 20:28:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:46,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:46,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022174999] [2022-07-19 20:28:46,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022174999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:46,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:46,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:28:46,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769018561] [2022-07-19 20:28:46,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:46,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:28:46,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:46,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:28:46,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:28:46,668 INFO L87 Difference]: Start difference. First operand 332 states and 471 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:28:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:46,766 INFO L93 Difference]: Finished difference Result 740 states and 1030 transitions. [2022-07-19 20:28:46,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:28:46,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-19 20:28:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:46,770 INFO L225 Difference]: With dead ends: 740 [2022-07-19 20:28:46,770 INFO L226 Difference]: Without dead ends: 549 [2022-07-19 20:28:46,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:28:46,776 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 366 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:46,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 543 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:28:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-07-19 20:28:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 497. [2022-07-19 20:28:46,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 431 states have (on average 1.3851508120649652) internal successors, (597), 439 states have internal predecessors, (597), 42 states have call successors, (42), 22 states have call predecessors, (42), 22 states have return successors, (50), 36 states have call predecessors, (50), 38 states have call successors, (50) [2022-07-19 20:28:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 689 transitions. [2022-07-19 20:28:46,824 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 689 transitions. Word has length 45 [2022-07-19 20:28:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:46,824 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 689 transitions. [2022-07-19 20:28:46,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 20:28:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 689 transitions. [2022-07-19 20:28:46,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 20:28:46,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:46,834 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:28:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 20:28:46,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash -748902494, now seen corresponding path program 1 times [2022-07-19 20:28:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:46,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464638659] [2022-07-19 20:28:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 20:28:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 20:28:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 20:28:46,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:46,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464638659] [2022-07-19 20:28:46,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464638659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:46,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:46,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:28:46,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922084315] [2022-07-19 20:28:46,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:46,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:28:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:28:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:28:46,903 INFO L87 Difference]: Start difference. First operand 497 states and 689 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:28:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:47,066 INFO L93 Difference]: Finished difference Result 1081 states and 1474 transitions. [2022-07-19 20:28:47,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:28:47,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-07-19 20:28:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:47,069 INFO L225 Difference]: With dead ends: 1081 [2022-07-19 20:28:47,070 INFO L226 Difference]: Without dead ends: 725 [2022-07-19 20:28:47,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:28:47,071 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 153 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:47,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 735 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:28:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-07-19 20:28:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 687. [2022-07-19 20:28:47,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 597 states have (on average 1.3350083752093802) internal successors, (797), 607 states have internal predecessors, (797), 56 states have call successors, (56), 30 states have call predecessors, (56), 32 states have return successors, (74), 50 states have call predecessors, (74), 52 states have call successors, (74) [2022-07-19 20:28:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 927 transitions. [2022-07-19 20:28:47,092 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 927 transitions. Word has length 62 [2022-07-19 20:28:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:47,092 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 927 transitions. [2022-07-19 20:28:47,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:28:47,092 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 927 transitions. [2022-07-19 20:28:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 20:28:47,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:47,094 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:28:47,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 20:28:47,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash -80982464, now seen corresponding path program 1 times [2022-07-19 20:28:47,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:47,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674489010] [2022-07-19 20:28:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:47,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 20:28:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 20:28:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 20:28:47,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:47,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674489010] [2022-07-19 20:28:47,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674489010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:47,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:47,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:28:47,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675405002] [2022-07-19 20:28:47,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:47,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:28:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:28:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 20:28:47,131 INFO L87 Difference]: Start difference. First operand 687 states and 927 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 20:28:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:47,226 INFO L93 Difference]: Finished difference Result 1340 states and 1780 transitions. [2022-07-19 20:28:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:28:47,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-07-19 20:28:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:47,231 INFO L225 Difference]: With dead ends: 1340 [2022-07-19 20:28:47,231 INFO L226 Difference]: Without dead ends: 886 [2022-07-19 20:28:47,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:28:47,232 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 353 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:47,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 540 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 20:28:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-07-19 20:28:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 831. [2022-07-19 20:28:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 725 states have (on average 1.3075862068965518) internal successors, (948), 737 states have internal predecessors, (948), 64 states have call successors, (64), 36 states have call predecessors, (64), 40 states have return successors, (88), 58 states have call predecessors, (88), 60 states have call successors, (88) [2022-07-19 20:28:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1100 transitions. [2022-07-19 20:28:47,283 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1100 transitions. Word has length 67 [2022-07-19 20:28:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:47,283 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 1100 transitions. [2022-07-19 20:28:47,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 20:28:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1100 transitions. [2022-07-19 20:28:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:28:47,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:47,285 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:47,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 20:28:47,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:47,286 INFO L85 PathProgramCache]: Analyzing trace with hash -294715005, now seen corresponding path program 1 times [2022-07-19 20:28:47,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:47,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745115273] [2022-07-19 20:28:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:47,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:47,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:47,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745115273] [2022-07-19 20:28:47,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745115273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:47,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:47,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 20:28:47,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336842132] [2022-07-19 20:28:47,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:28:47,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:47,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:28:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:28:47,381 INFO L87 Difference]: Start difference. First operand 831 states and 1100 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:47,867 INFO L93 Difference]: Finished difference Result 1141 states and 1571 transitions. [2022-07-19 20:28:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:28:47,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-19 20:28:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:47,872 INFO L225 Difference]: With dead ends: 1141 [2022-07-19 20:28:47,872 INFO L226 Difference]: Without dead ends: 1017 [2022-07-19 20:28:47,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:28:47,875 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 566 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:47,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 826 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 20:28:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-07-19 20:28:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 952. [2022-07-19 20:28:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 828 states have (on average 1.3333333333333333) internal successors, (1104), 841 states have internal predecessors, (1104), 75 states have call successors, (75), 42 states have call predecessors, (75), 47 states have return successors, (102), 69 states have call predecessors, (102), 71 states have call successors, (102) [2022-07-19 20:28:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1281 transitions. [2022-07-19 20:28:47,914 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1281 transitions. Word has length 69 [2022-07-19 20:28:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:47,914 INFO L495 AbstractCegarLoop]: Abstraction has 952 states and 1281 transitions. [2022-07-19 20:28:47,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1281 transitions. [2022-07-19 20:28:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:28:47,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:47,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:47,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 20:28:47,917 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:47,917 INFO L85 PathProgramCache]: Analyzing trace with hash -192000641, now seen corresponding path program 1 times [2022-07-19 20:28:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:47,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553958180] [2022-07-19 20:28:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:47,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:47,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:48,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:48,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553958180] [2022-07-19 20:28:48,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553958180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:48,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:48,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:28:48,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872339436] [2022-07-19 20:28:48,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:48,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:28:48,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:28:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:48,004 INFO L87 Difference]: Start difference. First operand 952 states and 1281 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:48,643 INFO L93 Difference]: Finished difference Result 1414 states and 1975 transitions. [2022-07-19 20:28:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:28:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-19 20:28:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:48,648 INFO L225 Difference]: With dead ends: 1414 [2022-07-19 20:28:48,648 INFO L226 Difference]: Without dead ends: 1169 [2022-07-19 20:28:48,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:28:48,652 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 554 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:48,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 1295 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:28:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-07-19 20:28:48,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1066. [2022-07-19 20:28:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 924 states have (on average 1.3484848484848484) internal successors, (1246), 938 states have internal predecessors, (1246), 86 states have call successors, (86), 48 states have call predecessors, (86), 54 states have return successors, (115), 81 states have call predecessors, (115), 82 states have call successors, (115) [2022-07-19 20:28:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1447 transitions. [2022-07-19 20:28:48,690 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1447 transitions. Word has length 69 [2022-07-19 20:28:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:48,690 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1447 transitions. [2022-07-19 20:28:48,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1447 transitions. [2022-07-19 20:28:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:28:48,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:48,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:48,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 20:28:48,692 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:48,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:48,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1194784769, now seen corresponding path program 1 times [2022-07-19 20:28:48,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:48,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836576370] [2022-07-19 20:28:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:48,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:48,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:48,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:48,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:48,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:48,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:48,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836576370] [2022-07-19 20:28:48,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836576370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:48,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:48,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:28:48,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923032621] [2022-07-19 20:28:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:48,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:28:48,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:48,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:28:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:48,762 INFO L87 Difference]: Start difference. First operand 1066 states and 1447 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:49,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:49,365 INFO L93 Difference]: Finished difference Result 1815 states and 2569 transitions. [2022-07-19 20:28:49,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 20:28:49,366 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-19 20:28:49,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:49,371 INFO L225 Difference]: With dead ends: 1815 [2022-07-19 20:28:49,371 INFO L226 Difference]: Without dead ends: 1456 [2022-07-19 20:28:49,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-19 20:28:49,373 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 585 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:49,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 994 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:28:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-07-19 20:28:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1295. [2022-07-19 20:28:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1117 states have (on average 1.370635631154879) internal successors, (1531), 1133 states have internal predecessors, (1531), 108 states have call successors, (108), 60 states have call predecessors, (108), 68 states have return successors, (145), 105 states have call predecessors, (145), 104 states have call successors, (145) [2022-07-19 20:28:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1784 transitions. [2022-07-19 20:28:49,433 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1784 transitions. Word has length 69 [2022-07-19 20:28:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:49,434 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1784 transitions. [2022-07-19 20:28:49,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1784 transitions. [2022-07-19 20:28:49,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:28:49,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:49,436 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:49,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 20:28:49,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:49,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2070803775, now seen corresponding path program 1 times [2022-07-19 20:28:49,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:49,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726842699] [2022-07-19 20:28:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:49,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:49,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:49,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726842699] [2022-07-19 20:28:49,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726842699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:49,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:49,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:28:49,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320387711] [2022-07-19 20:28:49,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:49,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:28:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:49,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:28:49,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:49,490 INFO L87 Difference]: Start difference. First operand 1295 states and 1784 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:49,828 INFO L93 Difference]: Finished difference Result 2032 states and 2897 transitions. [2022-07-19 20:28:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:28:49,828 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-19 20:28:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:49,833 INFO L225 Difference]: With dead ends: 2032 [2022-07-19 20:28:49,833 INFO L226 Difference]: Without dead ends: 1444 [2022-07-19 20:28:49,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:28:49,835 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 458 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:49,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 811 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 20:28:49,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-07-19 20:28:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1295. [2022-07-19 20:28:49,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1117 states have (on average 1.3661593554162936) internal successors, (1526), 1133 states have internal predecessors, (1526), 108 states have call successors, (108), 60 states have call predecessors, (108), 68 states have return successors, (145), 105 states have call predecessors, (145), 104 states have call successors, (145) [2022-07-19 20:28:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1779 transitions. [2022-07-19 20:28:49,899 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1779 transitions. Word has length 69 [2022-07-19 20:28:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:49,901 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1779 transitions. [2022-07-19 20:28:49,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1779 transitions. [2022-07-19 20:28:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:28:49,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:49,903 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:49,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 20:28:49,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:49,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1780262847, now seen corresponding path program 1 times [2022-07-19 20:28:49,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:49,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64639677] [2022-07-19 20:28:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:49,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:49,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:49,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:49,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64639677] [2022-07-19 20:28:49,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64639677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:49,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:49,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:28:49,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135994366] [2022-07-19 20:28:49,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:49,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:28:49,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:28:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:49,962 INFO L87 Difference]: Start difference. First operand 1295 states and 1779 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:50,656 INFO L93 Difference]: Finished difference Result 2685 states and 3828 transitions. [2022-07-19 20:28:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:28:50,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-19 20:28:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:50,664 INFO L225 Difference]: With dead ends: 2685 [2022-07-19 20:28:50,664 INFO L226 Difference]: Without dead ends: 2097 [2022-07-19 20:28:50,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:28:50,666 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 550 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:50,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 1293 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:28:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2022-07-19 20:28:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1706. [2022-07-19 20:28:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1460 states have (on average 1.3815068493150684) internal successors, (2017), 1480 states have internal predecessors, (2017), 148 states have call successors, (148), 84 states have call predecessors, (148), 96 states have return successors, (207), 149 states have call predecessors, (207), 144 states have call successors, (207) [2022-07-19 20:28:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2372 transitions. [2022-07-19 20:28:50,722 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2372 transitions. Word has length 69 [2022-07-19 20:28:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:50,723 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 2372 transitions. [2022-07-19 20:28:50,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:50,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2372 transitions. [2022-07-19 20:28:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:28:50,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:50,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:50,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 20:28:50,725 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash -241922817, now seen corresponding path program 1 times [2022-07-19 20:28:50,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:50,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671911487] [2022-07-19 20:28:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:50,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:50,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:50,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:50,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:50,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:50,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:50,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:50,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671911487] [2022-07-19 20:28:50,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671911487] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:50,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:50,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 20:28:50,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861478713] [2022-07-19 20:28:50,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:50,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 20:28:50,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:50,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 20:28:50,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:50,774 INFO L87 Difference]: Start difference. First operand 1706 states and 2372 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:51,479 INFO L93 Difference]: Finished difference Result 4076 states and 5836 transitions. [2022-07-19 20:28:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 20:28:51,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-19 20:28:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:51,491 INFO L225 Difference]: With dead ends: 4076 [2022-07-19 20:28:51,491 INFO L226 Difference]: Without dead ends: 3077 [2022-07-19 20:28:51,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-19 20:28:51,495 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 554 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:51,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1266 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:28:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3077 states. [2022-07-19 20:28:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3077 to 2560. [2022-07-19 20:28:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2182 states have (on average 1.4055912007332723) internal successors, (3067), 2210 states have internal predecessors, (3067), 224 states have call successors, (224), 132 states have call predecessors, (224), 152 states have return successors, (345), 233 states have call predecessors, (345), 220 states have call successors, (345) [2022-07-19 20:28:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3636 transitions. [2022-07-19 20:28:51,590 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3636 transitions. Word has length 69 [2022-07-19 20:28:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:51,590 INFO L495 AbstractCegarLoop]: Abstraction has 2560 states and 3636 transitions. [2022-07-19 20:28:51,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:51,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3636 transitions. [2022-07-19 20:28:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:28:51,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:51,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:51,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 20:28:51,593 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2024458369, now seen corresponding path program 1 times [2022-07-19 20:28:51,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:51,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2260643] [2022-07-19 20:28:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:51,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:51,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:51,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:51,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:51,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2260643] [2022-07-19 20:28:51,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2260643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:51,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:28:51,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 20:28:51,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263546299] [2022-07-19 20:28:51,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:51,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:28:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:28:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:28:51,643 INFO L87 Difference]: Start difference. First operand 2560 states and 3636 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:52,275 INFO L93 Difference]: Finished difference Result 5934 states and 8606 transitions. [2022-07-19 20:28:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:28:52,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-07-19 20:28:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:52,289 INFO L225 Difference]: With dead ends: 5934 [2022-07-19 20:28:52,289 INFO L226 Difference]: Without dead ends: 4082 [2022-07-19 20:28:52,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-19 20:28:52,294 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 684 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:52,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 1003 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:28:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2022-07-19 20:28:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3500. [2022-07-19 20:28:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3500 states, 2964 states have (on average 1.4021592442645074) internal successors, (4156), 3009 states have internal predecessors, (4156), 320 states have call successors, (320), 186 states have call predecessors, (320), 214 states have return successors, (469), 320 states have call predecessors, (469), 316 states have call successors, (469) [2022-07-19 20:28:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3500 states to 3500 states and 4945 transitions. [2022-07-19 20:28:52,429 INFO L78 Accepts]: Start accepts. Automaton has 3500 states and 4945 transitions. Word has length 69 [2022-07-19 20:28:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:52,429 INFO L495 AbstractCegarLoop]: Abstraction has 3500 states and 4945 transitions. [2022-07-19 20:28:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 20:28:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3500 states and 4945 transitions. [2022-07-19 20:28:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 20:28:52,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:52,432 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:28:52,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 20:28:52,432 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:52,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:52,433 INFO L85 PathProgramCache]: Analyzing trace with hash 688510564, now seen corresponding path program 1 times [2022-07-19 20:28:52,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:52,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154741266] [2022-07-19 20:28:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:52,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:52,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:52,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:28:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:52,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:28:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 20:28:52,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:52,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154741266] [2022-07-19 20:28:52,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154741266] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:52,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322657031] [2022-07-19 20:28:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:52,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:52,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:52,492 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) [2022-07-19 20:28:52,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 20:28:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:52,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:28:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:28:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:28:52,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:28:52,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322657031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:52,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:28:52,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:28:52,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295832957] [2022-07-19 20:28:52,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:52,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:28:52,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:28:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:52,620 INFO L87 Difference]: Start difference. First operand 3500 states and 4945 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 20:28:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:52,751 INFO L93 Difference]: Finished difference Result 4043 states and 5668 transitions. [2022-07-19 20:28:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:28:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-07-19 20:28:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:52,763 INFO L225 Difference]: With dead ends: 4043 [2022-07-19 20:28:52,764 INFO L226 Difference]: Without dead ends: 3498 [2022-07-19 20:28:52,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:52,767 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 72 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:52,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 600 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:28:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3498 states. [2022-07-19 20:28:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3498 to 3454. [2022-07-19 20:28:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 2924 states have (on average 1.3991108071135432) internal successors, (4091), 2969 states have internal predecessors, (4091), 316 states have call successors, (316), 184 states have call predecessors, (316), 212 states have return successors, (463), 316 states have call predecessors, (463), 312 states have call successors, (463) [2022-07-19 20:28:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 4870 transitions. [2022-07-19 20:28:52,885 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 4870 transitions. Word has length 68 [2022-07-19 20:28:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:52,886 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 4870 transitions. [2022-07-19 20:28:52,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 20:28:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 4870 transitions. [2022-07-19 20:28:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 20:28:52,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:52,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:52,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 20:28:53,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 20:28:53,104 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1426484957, now seen corresponding path program 1 times [2022-07-19 20:28:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:53,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025884798] [2022-07-19 20:28:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:53,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:28:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:28:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:28:53,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025884798] [2022-07-19 20:28:53,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025884798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:53,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809168196] [2022-07-19 20:28:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:53,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:53,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:53,163 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) [2022-07-19 20:28:53,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 20:28:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 20:28:53,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:28:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:53,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:28:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:28:53,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809168196] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:53,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-19 20:28:53,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-19 20:28:53,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890187013] [2022-07-19 20:28:53,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:53,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 20:28:53,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 20:28:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:28:53,333 INFO L87 Difference]: Start difference. First operand 3454 states and 4870 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:28:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:53,457 INFO L93 Difference]: Finished difference Result 3506 states and 4932 transitions. [2022-07-19 20:28:53,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 20:28:53,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-07-19 20:28:53,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:53,468 INFO L225 Difference]: With dead ends: 3506 [2022-07-19 20:28:53,469 INFO L226 Difference]: Without dead ends: 3503 [2022-07-19 20:28:53,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:28:53,470 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 493 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:53,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 376 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:28:53,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3503 states. [2022-07-19 20:28:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3503 to 3453. [2022-07-19 20:28:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 2924 states have (on average 1.3984268125854993) internal successors, (4089), 2968 states have internal predecessors, (4089), 315 states have call successors, (315), 184 states have call predecessors, (315), 212 states have return successors, (463), 316 states have call predecessors, (463), 312 states have call successors, (463) [2022-07-19 20:28:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 4867 transitions. [2022-07-19 20:28:53,607 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 4867 transitions. Word has length 68 [2022-07-19 20:28:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:53,607 INFO L495 AbstractCegarLoop]: Abstraction has 3453 states and 4867 transitions. [2022-07-19 20:28:53,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 20:28:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 4867 transitions. [2022-07-19 20:28:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:28:53,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:53,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:53,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 20:28:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 20:28:53,827 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1272047869, now seen corresponding path program 1 times [2022-07-19 20:28:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:53,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745019306] [2022-07-19 20:28:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:28:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 20:28:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:28:53,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745019306] [2022-07-19 20:28:53,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745019306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288523229] [2022-07-19 20:28:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:53,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:53,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:53,886 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) [2022-07-19 20:28:53,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 20:28:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 20:28:53,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:28:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:28:54,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:28:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:28:54,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288523229] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:28:54,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:28:54,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-19 20:28:54,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168800275] [2022-07-19 20:28:54,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:28:54,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 20:28:54,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:54,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 20:28:54,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-19 20:28:54,167 INFO L87 Difference]: Start difference. First operand 3453 states and 4867 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 20:28:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:55,104 INFO L93 Difference]: Finished difference Result 4963 states and 6805 transitions. [2022-07-19 20:28:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 20:28:55,105 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-07-19 20:28:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:55,126 INFO L225 Difference]: With dead ends: 4963 [2022-07-19 20:28:55,126 INFO L226 Difference]: Without dead ends: 4467 [2022-07-19 20:28:55,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 20:28:55,131 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 664 mSDsluCounter, 2105 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:55,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 2517 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 20:28:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4467 states. [2022-07-19 20:28:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4467 to 3832. [2022-07-19 20:28:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3264 states have (on average 1.3789828431372548) internal successors, (4501), 3316 states have internal predecessors, (4501), 335 states have call successors, (335), 198 states have call predecessors, (335), 231 states have return successors, (497), 333 states have call predecessors, (497), 332 states have call successors, (497) [2022-07-19 20:28:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 5333 transitions. [2022-07-19 20:28:55,286 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 5333 transitions. Word has length 69 [2022-07-19 20:28:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:55,286 INFO L495 AbstractCegarLoop]: Abstraction has 3832 states and 5333 transitions. [2022-07-19 20:28:55,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-19 20:28:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 5333 transitions. [2022-07-19 20:28:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 20:28:55,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:55,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:55,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 20:28:55,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:55,507 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash -290000336, now seen corresponding path program 1 times [2022-07-19 20:28:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687332968] [2022-07-19 20:28:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:55,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:55,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:28:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:55,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 20:28:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:55,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-19 20:28:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 20:28:55,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:55,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687332968] [2022-07-19 20:28:55,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687332968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:55,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689880610] [2022-07-19 20:28:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:55,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:55,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:55,559 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) [2022-07-19 20:28:55,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 20:28:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:55,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:28:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:28:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 20:28:55,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:28:55,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689880610] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:55,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:28:55,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:28:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704077433] [2022-07-19 20:28:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:28:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:28:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:55,653 INFO L87 Difference]: Start difference. First operand 3832 states and 5333 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 20:28:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:55,779 INFO L93 Difference]: Finished difference Result 4523 states and 6208 transitions. [2022-07-19 20:28:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:28:55,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-07-19 20:28:55,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:55,791 INFO L225 Difference]: With dead ends: 4523 [2022-07-19 20:28:55,791 INFO L226 Difference]: Without dead ends: 3754 [2022-07-19 20:28:55,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:55,794 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 247 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:55,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 391 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:28:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-07-19 20:28:55,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3745. [2022-07-19 20:28:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3187 states have (on average 1.3796673988076562) internal successors, (4397), 3238 states have internal predecessors, (4397), 331 states have call successors, (331), 194 states have call predecessors, (331), 225 states have return successors, (489), 328 states have call predecessors, (489), 328 states have call successors, (489) [2022-07-19 20:28:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 5217 transitions. [2022-07-19 20:28:55,930 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 5217 transitions. Word has length 88 [2022-07-19 20:28:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:55,930 INFO L495 AbstractCegarLoop]: Abstraction has 3745 states and 5217 transitions. [2022-07-19 20:28:55,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 20:28:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 5217 transitions. [2022-07-19 20:28:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-19 20:28:55,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:55,951 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:55,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 20:28:56,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 20:28:56,162 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1575033221, now seen corresponding path program 1 times [2022-07-19 20:28:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:56,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186044925] [2022-07-19 20:28:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 20:28:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 20:28:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 20:28:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 20:28:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 20:28:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 20:28:56,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:56,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186044925] [2022-07-19 20:28:56,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186044925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:56,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934986527] [2022-07-19 20:28:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:56,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:56,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:56,214 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) [2022-07-19 20:28:56,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 20:28:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:28:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:28:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:28:56,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:28:56,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934986527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:56,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:28:56,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 20:28:56,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479935168] [2022-07-19 20:28:56,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:28:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:56,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:28:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:56,304 INFO L87 Difference]: Start difference. First operand 3745 states and 5217 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 20:28:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:56,393 INFO L93 Difference]: Finished difference Result 4122 states and 5678 transitions. [2022-07-19 20:28:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:28:56,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-07-19 20:28:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:56,401 INFO L225 Difference]: With dead ends: 4122 [2022-07-19 20:28:56,401 INFO L226 Difference]: Without dead ends: 2804 [2022-07-19 20:28:56,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:28:56,404 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 61 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:56,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 595 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:28:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2022-07-19 20:28:56,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2804. [2022-07-19 20:28:56,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2349 states have (on average 1.4355044699872286) internal successors, (3372), 2384 states have internal predecessors, (3372), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2022-07-19 20:28:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 4043 transitions. [2022-07-19 20:28:56,536 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 4043 transitions. Word has length 103 [2022-07-19 20:28:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:56,536 INFO L495 AbstractCegarLoop]: Abstraction has 2804 states and 4043 transitions. [2022-07-19 20:28:56,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 20:28:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 4043 transitions. [2022-07-19 20:28:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 20:28:56,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:56,542 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] [2022-07-19 20:28:56,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 20:28:56,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 20:28:56,748 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:56,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1375832156, now seen corresponding path program 1 times [2022-07-19 20:28:56,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:56,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505830393] [2022-07-19 20:28:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:56,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:56,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 20:28:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:28:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:28:56,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 20:28:56,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:56,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505830393] [2022-07-19 20:28:56,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505830393] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:56,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583000615] [2022-07-19 20:28:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:56,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:56,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:56,817 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) [2022-07-19 20:28:56,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 20:28:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:28:56,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:28:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 20:28:56,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:28:56,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583000615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:56,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:28:56,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 20:28:56,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946971837] [2022-07-19 20:28:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:56,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:28:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:56,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:28:56,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:28:56,938 INFO L87 Difference]: Start difference. First operand 2804 states and 4043 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:28:57,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:57,087 INFO L93 Difference]: Finished difference Result 8245 states and 11965 transitions. [2022-07-19 20:28:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:28:57,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2022-07-19 20:28:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:57,102 INFO L225 Difference]: With dead ends: 8245 [2022-07-19 20:28:57,102 INFO L226 Difference]: Without dead ends: 5453 [2022-07-19 20:28:57,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:28:57,110 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 152 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:57,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 374 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:28:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2022-07-19 20:28:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 5397. [2022-07-19 20:28:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5397 states, 4528 states have (on average 1.4339664310954063) internal successors, (6493), 4596 states have internal predecessors, (6493), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2022-07-19 20:28:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5397 states to 5397 states and 7750 transitions. [2022-07-19 20:28:57,314 INFO L78 Accepts]: Start accepts. Automaton has 5397 states and 7750 transitions. Word has length 111 [2022-07-19 20:28:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:57,315 INFO L495 AbstractCegarLoop]: Abstraction has 5397 states and 7750 transitions. [2022-07-19 20:28:57,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 20:28:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 5397 states and 7750 transitions. [2022-07-19 20:28:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 20:28:57,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:57,322 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] [2022-07-19 20:28:57,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 20:28:57,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 20:28:57,535 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:57,536 INFO L85 PathProgramCache]: Analyzing trace with hash 483275324, now seen corresponding path program 1 times [2022-07-19 20:28:57,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:57,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609795297] [2022-07-19 20:28:57,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:57,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 20:28:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:28:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-19 20:28:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 20:28:57,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:57,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609795297] [2022-07-19 20:28:57,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609795297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:57,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162557430] [2022-07-19 20:28:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:57,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:57,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:28:57,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 20:28:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:57,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:28:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:28:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 20:28:57,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:28:57,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162557430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:57,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:28:57,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:28:57,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531766925] [2022-07-19 20:28:57,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:57,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:28:57,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:28:57,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:28:57,688 INFO L87 Difference]: Start difference. First operand 5397 states and 7750 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 20:28:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:58,034 INFO L93 Difference]: Finished difference Result 15785 states and 22914 transitions. [2022-07-19 20:28:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:28:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2022-07-19 20:28:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:58,061 INFO L225 Difference]: With dead ends: 15785 [2022-07-19 20:28:58,061 INFO L226 Difference]: Without dead ends: 10401 [2022-07-19 20:28:58,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:28:58,072 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 153 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:58,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 544 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:28:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2022-07-19 20:28:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10401. [2022-07-19 20:28:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10401 states, 8719 states have (on average 1.4182819130634248) internal successors, (12366), 8836 states have internal predecessors, (12366), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2022-07-19 20:28:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10401 states to 10401 states and 14939 transitions. [2022-07-19 20:28:58,494 INFO L78 Accepts]: Start accepts. Automaton has 10401 states and 14939 transitions. Word has length 111 [2022-07-19 20:28:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:28:58,494 INFO L495 AbstractCegarLoop]: Abstraction has 10401 states and 14939 transitions. [2022-07-19 20:28:58,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 20:28:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 10401 states and 14939 transitions. [2022-07-19 20:28:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-19 20:28:58,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:28:58,516 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:28:58,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 20:28:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:58,734 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:28:58,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:28:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash 142639029, now seen corresponding path program 1 times [2022-07-19 20:28:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:28:58,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529661509] [2022-07-19 20:28:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:28:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:28:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:28:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:28:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:28:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:28:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 20:28:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:28:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-19 20:28:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:28:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-19 20:28:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 20:28:58,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:28:58,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529661509] [2022-07-19 20:28:58,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529661509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:28:58,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068239392] [2022-07-19 20:28:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:28:58,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:28:58,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:28:58,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:28:58,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 20:28:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:28:58,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:28:58,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:28:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 20:28:58,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:28:58,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068239392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:28:58,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:28:58,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 20:28:58,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987046043] [2022-07-19 20:28:58,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:28:58,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:28:58,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:28:58,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:28:58,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:28:58,980 INFO L87 Difference]: Start difference. First operand 10401 states and 14939 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 20:28:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:28:59,648 INFO L93 Difference]: Finished difference Result 30737 states and 44476 transitions. [2022-07-19 20:28:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:28:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2022-07-19 20:28:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:28:59,712 INFO L225 Difference]: With dead ends: 30737 [2022-07-19 20:28:59,712 INFO L226 Difference]: Without dead ends: 20353 [2022-07-19 20:28:59,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:28:59,742 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 110 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:28:59,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 395 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:28:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20353 states. [2022-07-19 20:29:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20353 to 20141. [2022-07-19 20:29:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20141 states, 16879 states have (on average 1.4133538716748621) internal successors, (23856), 17110 states have internal predecessors, (23856), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2022-07-19 20:29:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20141 states to 20141 states and 28765 transitions. [2022-07-19 20:29:00,597 INFO L78 Accepts]: Start accepts. Automaton has 20141 states and 28765 transitions. Word has length 143 [2022-07-19 20:29:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:00,598 INFO L495 AbstractCegarLoop]: Abstraction has 20141 states and 28765 transitions. [2022-07-19 20:29:00,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 20:29:00,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20141 states and 28765 transitions. [2022-07-19 20:29:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-19 20:29:00,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:00,647 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, 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] [2022-07-19 20:29:00,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:00,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:00,865 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:00,865 INFO L85 PathProgramCache]: Analyzing trace with hash 28732006, now seen corresponding path program 1 times [2022-07-19 20:29:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:00,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78602827] [2022-07-19 20:29:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 20:29:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 20:29:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-19 20:29:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-19 20:29:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-19 20:29:00,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:00,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78602827] [2022-07-19 20:29:00,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78602827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:00,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070938697] [2022-07-19 20:29:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:00,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:00,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:00,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:00,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 20:29:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 20:29:01,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:01,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070938697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:01,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:01,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:01,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039734380] [2022-07-19 20:29:01,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:01,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:01,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:01,114 INFO L87 Difference]: Start difference. First operand 20141 states and 28765 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 20:29:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:01,965 INFO L93 Difference]: Finished difference Result 42657 states and 61614 transitions. [2022-07-19 20:29:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2022-07-19 20:29:01,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:02,033 INFO L225 Difference]: With dead ends: 42657 [2022-07-19 20:29:02,034 INFO L226 Difference]: Without dead ends: 22535 [2022-07-19 20:29:02,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:02,080 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 130 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:02,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 226 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22535 states. [2022-07-19 20:29:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22535 to 22535. [2022-07-19 20:29:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22535 states, 19061 states have (on average 1.3748491684591575) internal successors, (26206), 19292 states have internal predecessors, (26206), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2022-07-19 20:29:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22535 states to 22535 states and 31237 transitions. [2022-07-19 20:29:03,059 INFO L78 Accepts]: Start accepts. Automaton has 22535 states and 31237 transitions. Word has length 160 [2022-07-19 20:29:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:03,059 INFO L495 AbstractCegarLoop]: Abstraction has 22535 states and 31237 transitions. [2022-07-19 20:29:03,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 20:29:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 22535 states and 31237 transitions. [2022-07-19 20:29:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-19 20:29:03,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:03,096 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, 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] [2022-07-19 20:29:03,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 20:29:03,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:03,314 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash -124896125, now seen corresponding path program 1 times [2022-07-19 20:29:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:03,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343065862] [2022-07-19 20:29:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 20:29:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 20:29:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-19 20:29:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-19 20:29:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 20:29:03,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:03,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343065862] [2022-07-19 20:29:03,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343065862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:03,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230414507] [2022-07-19 20:29:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:03,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:03,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:03,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:03,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 20:29:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:29:03,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 20:29:03,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:03,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230414507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:03,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:03,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:03,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986542147] [2022-07-19 20:29:03,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:03,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:03,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:03,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:03,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:03,524 INFO L87 Difference]: Start difference. First operand 22535 states and 31237 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 20:29:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:04,545 INFO L93 Difference]: Finished difference Result 39568 states and 54775 transitions. [2022-07-19 20:29:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:04,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2022-07-19 20:29:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:04,621 INFO L225 Difference]: With dead ends: 39568 [2022-07-19 20:29:04,621 INFO L226 Difference]: Without dead ends: 24075 [2022-07-19 20:29:04,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:04,663 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 131 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:04,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 392 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24075 states. [2022-07-19 20:29:05,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24075 to 23935. [2022-07-19 20:29:05,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23935 states, 20349 states have (on average 1.350140056022409) internal successors, (27474), 20580 states have internal predecessors, (27474), 1945 states have call successors, (1945), 1449 states have call predecessors, (1945), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2022-07-19 20:29:05,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23935 states to 23935 states and 32637 transitions. [2022-07-19 20:29:05,909 INFO L78 Accepts]: Start accepts. Automaton has 23935 states and 32637 transitions. Word has length 160 [2022-07-19 20:29:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:05,910 INFO L495 AbstractCegarLoop]: Abstraction has 23935 states and 32637 transitions. [2022-07-19 20:29:05,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 20:29:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 23935 states and 32637 transitions. [2022-07-19 20:29:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 20:29:05,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:05,943 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, 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] [2022-07-19 20:29:05,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:06,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 20:29:06,159 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:06,160 INFO L85 PathProgramCache]: Analyzing trace with hash -402645848, now seen corresponding path program 1 times [2022-07-19 20:29:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:06,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437241596] [2022-07-19 20:29:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 20:29:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-19 20:29:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 20:29:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-19 20:29:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 20:29:06,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:06,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437241596] [2022-07-19 20:29:06,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437241596] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:06,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861184420] [2022-07-19 20:29:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:06,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:06,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:06,231 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:06,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 20:29:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:06,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 20:29:06,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:06,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861184420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:06,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:06,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551398485] [2022-07-19 20:29:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:06,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:06,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:06,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:06,338 INFO L87 Difference]: Start difference. First operand 23935 states and 32637 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 20:29:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:07,863 INFO L93 Difference]: Finished difference Result 70545 states and 97151 transitions. [2022-07-19 20:29:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:07,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2022-07-19 20:29:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:08,003 INFO L225 Difference]: With dead ends: 70545 [2022-07-19 20:29:08,004 INFO L226 Difference]: Without dead ends: 46629 [2022-07-19 20:29:08,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:08,059 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 163 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:08,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 553 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46629 states. [2022-07-19 20:29:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46629 to 46585. [2022-07-19 20:29:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46585 states, 39585 states have (on average 1.338890994063408) internal successors, (53000), 40046 states have internal predecessors, (53000), 3775 states have call successors, (3775), 2841 states have call predecessors, (3775), 3224 states have return successors, (7134), 3761 states have call predecessors, (7134), 3773 states have call successors, (7134) [2022-07-19 20:29:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46585 states to 46585 states and 63909 transitions. [2022-07-19 20:29:10,260 INFO L78 Accepts]: Start accepts. Automaton has 46585 states and 63909 transitions. Word has length 161 [2022-07-19 20:29:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:10,261 INFO L495 AbstractCegarLoop]: Abstraction has 46585 states and 63909 transitions. [2022-07-19 20:29:10,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 20:29:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 46585 states and 63909 transitions. [2022-07-19 20:29:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 20:29:10,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:10,338 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, 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] [2022-07-19 20:29:10,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 20:29:10,539 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1546394152, now seen corresponding path program 1 times [2022-07-19 20:29:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352331897] [2022-07-19 20:29:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:10,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 20:29:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-19 20:29:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-19 20:29:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-19 20:29:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-19 20:29:10,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:10,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352331897] [2022-07-19 20:29:10,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352331897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:10,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190762872] [2022-07-19 20:29:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:10,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:10,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:10,611 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:10,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 20:29:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:10,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 20:29:10,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:10,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190762872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:10,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:10,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:10,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330451429] [2022-07-19 20:29:10,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:10,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:10,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:10,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:10,777 INFO L87 Difference]: Start difference. First operand 46585 states and 63909 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 20:29:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:12,562 INFO L93 Difference]: Finished difference Result 76949 states and 107564 transitions. [2022-07-19 20:29:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2022-07-19 20:29:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:12,703 INFO L225 Difference]: With dead ends: 76949 [2022-07-19 20:29:12,703 INFO L226 Difference]: Without dead ends: 39401 [2022-07-19 20:29:12,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:12,756 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 125 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:12,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 224 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39401 states. [2022-07-19 20:29:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39401 to 28185. [2022-07-19 20:29:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28185 states, 24009 states have (on average 1.2966804115123496) internal successors, (31132), 24250 states have internal predecessors, (31132), 2255 states have call successors, (2255), 1729 states have call predecessors, (2255), 1920 states have return successors, (3778), 2237 states have call predecessors, (3778), 2253 states have call successors, (3778) [2022-07-19 20:29:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28185 states to 28185 states and 37165 transitions. [2022-07-19 20:29:14,429 INFO L78 Accepts]: Start accepts. Automaton has 28185 states and 37165 transitions. Word has length 161 [2022-07-19 20:29:14,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:14,429 INFO L495 AbstractCegarLoop]: Abstraction has 28185 states and 37165 transitions. [2022-07-19 20:29:14,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-19 20:29:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 28185 states and 37165 transitions. [2022-07-19 20:29:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 20:29:14,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:14,461 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, 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] [2022-07-19 20:29:14,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 20:29:14,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-19 20:29:14,669 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:14,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1993102869, now seen corresponding path program 1 times [2022-07-19 20:29:14,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:14,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849860914] [2022-07-19 20:29:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:14,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 20:29:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-19 20:29:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-19 20:29:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-19 20:29:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-19 20:29:14,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:14,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849860914] [2022-07-19 20:29:14,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849860914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:14,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128397129] [2022-07-19 20:29:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:14,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:14,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:14,734 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:14,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 20:29:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:29:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 20:29:14,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:14,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128397129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:14,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:14,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:14,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200948059] [2022-07-19 20:29:14,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:14,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:14,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:14,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:14,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:14,836 INFO L87 Difference]: Start difference. First operand 28185 states and 37165 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 20:29:17,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:17,118 INFO L93 Difference]: Finished difference Result 80093 states and 106937 transitions. [2022-07-19 20:29:17,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:17,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2022-07-19 20:29:17,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:17,269 INFO L225 Difference]: With dead ends: 80093 [2022-07-19 20:29:17,269 INFO L226 Difference]: Without dead ends: 51937 [2022-07-19 20:29:17,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:17,314 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 150 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:17,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 544 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51937 states. [2022-07-19 20:29:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51937 to 51933. [2022-07-19 20:29:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51933 states, 44065 states have (on average 1.2859185294451378) internal successors, (56664), 44546 states have internal predecessors, (56664), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2022-07-19 20:29:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51933 states to 51933 states and 69131 transitions. [2022-07-19 20:29:19,815 INFO L78 Accepts]: Start accepts. Automaton has 51933 states and 69131 transitions. Word has length 161 [2022-07-19 20:29:19,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:19,815 INFO L495 AbstractCegarLoop]: Abstraction has 51933 states and 69131 transitions. [2022-07-19 20:29:19,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-19 20:29:19,815 INFO L276 IsEmpty]: Start isEmpty. Operand 51933 states and 69131 transitions. [2022-07-19 20:29:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 20:29:19,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:19,867 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, 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] [2022-07-19 20:29:19,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 20:29:20,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 20:29:20,067 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash -129116033, now seen corresponding path program 1 times [2022-07-19 20:29:20,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:20,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313620727] [2022-07-19 20:29:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:20,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 20:29:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 20:29:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 20:29:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-19 20:29:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 20:29:20,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:20,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313620727] [2022-07-19 20:29:20,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313620727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:20,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22357135] [2022-07-19 20:29:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:20,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:20,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:20,127 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:20,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 20:29:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:20,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:29:20,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-19 20:29:20,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:20,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22357135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:20,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:20,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:20,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973865201] [2022-07-19 20:29:20,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:20,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:20,242 INFO L87 Difference]: Start difference. First operand 51933 states and 69131 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 20:29:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:22,810 INFO L93 Difference]: Finished difference Result 92895 states and 123871 transitions. [2022-07-19 20:29:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2022-07-19 20:29:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:22,945 INFO L225 Difference]: With dead ends: 92895 [2022-07-19 20:29:22,946 INFO L226 Difference]: Without dead ends: 52777 [2022-07-19 20:29:23,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:23,001 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 151 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:23,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 400 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52777 states. [2022-07-19 20:29:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52777 to 51933. [2022-07-19 20:29:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51933 states, 44065 states have (on average 1.2777487802110519) internal successors, (56304), 44546 states have internal predecessors, (56304), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2022-07-19 20:29:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51933 states to 51933 states and 68771 transitions. [2022-07-19 20:29:25,785 INFO L78 Accepts]: Start accepts. Automaton has 51933 states and 68771 transitions. Word has length 161 [2022-07-19 20:29:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:25,786 INFO L495 AbstractCegarLoop]: Abstraction has 51933 states and 68771 transitions. [2022-07-19 20:29:25,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 20:29:25,786 INFO L276 IsEmpty]: Start isEmpty. Operand 51933 states and 68771 transitions. [2022-07-19 20:29:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 20:29:25,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:25,845 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, 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] [2022-07-19 20:29:25,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 20:29:26,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:26,060 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1698954724, now seen corresponding path program 1 times [2022-07-19 20:29:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:26,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993457537] [2022-07-19 20:29:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 20:29:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 20:29:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-19 20:29:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-19 20:29:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 20:29:26,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:26,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993457537] [2022-07-19 20:29:26,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993457537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:29:26,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189160305] [2022-07-19 20:29:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:26,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:29:26,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:29:26,127 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:29:26,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 20:29:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 20:29:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:29:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 20:29:26,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:29:26,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189160305] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:26,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:29:26,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 20:29:26,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029952179] [2022-07-19 20:29:26,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:29:26,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:26,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:29:26,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:26,382 INFO L87 Difference]: Start difference. First operand 51933 states and 68771 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 20:29:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:28,610 INFO L93 Difference]: Finished difference Result 92605 states and 122981 transitions. [2022-07-19 20:29:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:29:28,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2022-07-19 20:29:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:28,749 INFO L225 Difference]: With dead ends: 92605 [2022-07-19 20:29:28,749 INFO L226 Difference]: Without dead ends: 53329 [2022-07-19 20:29:28,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:28,815 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 150 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:28,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 416 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:29:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53329 states. [2022-07-19 20:29:31,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53329 to 51813. [2022-07-19 20:29:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51813 states, 43945 states have (on average 1.2703151666856298) internal successors, (55824), 44426 states have internal predecessors, (55824), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2022-07-19 20:29:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51813 states to 51813 states and 68291 transitions. [2022-07-19 20:29:31,581 INFO L78 Accepts]: Start accepts. Automaton has 51813 states and 68291 transitions. Word has length 161 [2022-07-19 20:29:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:31,581 INFO L495 AbstractCegarLoop]: Abstraction has 51813 states and 68291 transitions. [2022-07-19 20:29:31,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 20:29:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 51813 states and 68291 transitions. [2022-07-19 20:29:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 20:29:31,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:31,635 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, 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] [2022-07-19 20:29:31,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 20:29:31,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 20:29:31,835 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:31,836 INFO L85 PathProgramCache]: Analyzing trace with hash 590012799, now seen corresponding path program 1 times [2022-07-19 20:29:31,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:31,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597548187] [2022-07-19 20:29:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:31,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 20:29:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 20:29:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-19 20:29:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-19 20:29:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-19 20:29:31,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:31,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597548187] [2022-07-19 20:29:31,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597548187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:31,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:31,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:29:31,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112112990] [2022-07-19 20:29:31,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:31,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:29:31,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:31,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:29:31,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:31,878 INFO L87 Difference]: Start difference. First operand 51813 states and 68291 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 20:29:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:34,560 INFO L93 Difference]: Finished difference Result 101193 states and 132294 transitions. [2022-07-19 20:29:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:29:34,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2022-07-19 20:29:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:34,695 INFO L225 Difference]: With dead ends: 101193 [2022-07-19 20:29:34,696 INFO L226 Difference]: Without dead ends: 49405 [2022-07-19 20:29:34,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:34,763 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 296 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:34,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 339 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 20:29:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49405 states. [2022-07-19 20:29:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49405 to 46687. [2022-07-19 20:29:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46687 states, 39903 states have (on average 1.27083176703506) internal successors, (50710), 40796 states have internal predecessors, (50710), 3255 states have call successors, (3255), 2473 states have call predecessors, (3255), 3528 states have return successors, (6773), 3449 states have call predecessors, (6773), 3253 states have call successors, (6773) [2022-07-19 20:29:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46687 states to 46687 states and 60738 transitions. [2022-07-19 20:29:37,175 INFO L78 Accepts]: Start accepts. Automaton has 46687 states and 60738 transitions. Word has length 161 [2022-07-19 20:29:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:29:37,175 INFO L495 AbstractCegarLoop]: Abstraction has 46687 states and 60738 transitions. [2022-07-19 20:29:37,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 20:29:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 46687 states and 60738 transitions. [2022-07-19 20:29:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-19 20:29:37,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:29:37,209 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, 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] [2022-07-19 20:29:37,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 20:29:37,209 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:29:37,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:29:37,209 INFO L85 PathProgramCache]: Analyzing trace with hash -806789094, now seen corresponding path program 1 times [2022-07-19 20:29:37,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:29:37,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041640759] [2022-07-19 20:29:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:29:37,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:29:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 20:29:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 20:29:37,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 20:29:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 20:29:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-19 20:29:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-19 20:29:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-19 20:29:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-19 20:29:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-19 20:29:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-19 20:29:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:29:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 20:29:37,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:29:37,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041640759] [2022-07-19 20:29:37,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041640759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:29:37,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:29:37,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:29:37,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946271359] [2022-07-19 20:29:37,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:29:37,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:29:37,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:29:37,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:29:37,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:29:37,260 INFO L87 Difference]: Start difference. First operand 46687 states and 60738 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-19 20:29:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:29:39,247 INFO L93 Difference]: Finished difference Result 84469 states and 109697 transitions. [2022-07-19 20:29:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:29:39,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2022-07-19 20:29:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:29:39,334 INFO L225 Difference]: With dead ends: 84469 [2022-07-19 20:29:39,334 INFO L226 Difference]: Without dead ends: 37799 [2022-07-19 20:29:39,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:29:39,388 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 296 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:29:39,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 337 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:29:39,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37799 states.