./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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.06.cil-1.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 ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:10:31,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:10:31,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:10:31,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:10:31,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:10:31,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:10:31,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:10:31,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:10:31,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:10:31,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:10:31,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:10:31,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:10:31,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:10:31,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:10:31,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:10:31,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:10:31,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:10:31,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:10:31,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:10:31,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:10:31,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:10:31,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:10:31,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:10:31,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:10:31,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:10:31,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:10:31,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:10:31,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:10:31,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:10:31,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:10:31,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:10:31,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:10:31,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:10:31,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:10:31,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:10:31,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:10:31,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:10:31,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:10:31,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:10:31,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:10:31,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:10:31,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:10:31,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:10:31,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:10:31,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:10:31,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:10:31,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:10:31,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:10:31,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:10:31,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:10:31,404 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:10:31,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:10:31,405 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:10:31,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:10:31,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:10:31,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:10:31,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:10:31,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:10:31,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:10:31,406 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:10:31,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:10:31,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:10:31,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:10:31,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:10:31,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:10:31,412 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:10:31,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:10:31,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:10:31,413 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:10:31,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:10:31,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:10:31,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:10:31,414 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:10:31,414 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:10:31,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:10:31,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:10:31,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 [2021-12-22 13:10:31,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:10:31,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:10:31,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:10:31,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:10:31,625 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:10:31,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2021-12-22 13:10:31,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7efad3907/fc32694bf71a4831bc9eca361ec31cd5/FLAG6f3c7cc33 [2021-12-22 13:10:32,098 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:10:32,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2021-12-22 13:10:32,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7efad3907/fc32694bf71a4831bc9eca361ec31cd5/FLAG6f3c7cc33 [2021-12-22 13:10:32,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7efad3907/fc32694bf71a4831bc9eca361ec31cd5 [2021-12-22 13:10:32,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:10:32,135 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:10:32,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:10:32,136 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:10:32,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:10:32,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585e060e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32, skipping insertion in model container [2021-12-22 13:10:32,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:10:32,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:10:32,320 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.06.cil-1.c[913,926] [2021-12-22 13:10:32,345 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.06.cil-1.c[5977,5990] [2021-12-22 13:10:32,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:10:32,435 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:10:32,452 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.06.cil-1.c[913,926] [2021-12-22 13:10:32,464 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.06.cil-1.c[5977,5990] [2021-12-22 13:10:32,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:10:32,502 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:10:32,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32 WrapperNode [2021-12-22 13:10:32,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:10:32,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:10:32,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:10:32,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:10:32,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,544 INFO L137 Inliner]: procedures = 60, calls = 67, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 712 [2021-12-22 13:10:32,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:10:32,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:10:32,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:10:32,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:10:32,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:10:32,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:10:32,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:10:32,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:10:32,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (1/1) ... [2021-12-22 13:10:32,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:10:32,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:32,600 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) [2021-12-22 13:10:32,618 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 [2021-12-22 13:10:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:10:32,642 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:10:32,643 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:10:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-22 13:10:32,643 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-22 13:10:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:10:32,643 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:10:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:10:32,643 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:10:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:10:32,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:10:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:10:32,644 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:10:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:10:32,644 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:10:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:10:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:10:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:10:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:10:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:10:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:10:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:10:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:10:32,646 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:10:32,727 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:10:32,728 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:10:33,180 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:10:33,188 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:10:33,188 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-12-22 13:10:33,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:33 BoogieIcfgContainer [2021-12-22 13:10:33,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:10:33,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:10:33,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:10:33,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:10:33,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:10:32" (1/3) ... [2021-12-22 13:10:33,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf83b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:33, skipping insertion in model container [2021-12-22 13:10:33,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:32" (2/3) ... [2021-12-22 13:10:33,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf83b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:33, skipping insertion in model container [2021-12-22 13:10:33,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:33" (3/3) ... [2021-12-22 13:10:33,205 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2021-12-22 13:10:33,212 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:10:33,212 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:10:33,251 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:10:33,257 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:10:33,257 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:10:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-22 13:10:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 13:10:33,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:33,312 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:33,313 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash -953270584, now seen corresponding path program 1 times [2021-12-22 13:10:33,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:33,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304358393] [2021-12-22 13:10:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:33,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 13:10:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:33,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:33,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304358393] [2021-12-22 13:10:33,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304358393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:33,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:33,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:33,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116119908] [2021-12-22 13:10:33,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:33,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:33,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:33,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:33,534 INFO L87 Difference]: Start difference. First operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) 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) [2021-12-22 13:10:33,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:33,756 INFO L93 Difference]: Finished difference Result 674 states and 1072 transitions. [2021-12-22 13:10:33,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:33,759 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 [2021-12-22 13:10:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:33,771 INFO L225 Difference]: With dead ends: 674 [2021-12-22 13:10:33,771 INFO L226 Difference]: Without dead ends: 371 [2021-12-22 13:10:33,775 INFO L932 BasicCegarLoop]: 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 [2021-12-22 13:10:33,778 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 597 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:33,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 784 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-22 13:10:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 365. [2021-12-22 13:10:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 320 states have (on average 1.496875) internal successors, (479), 325 states have internal predecessors, (479), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2021-12-22 13:10:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 545 transitions. [2021-12-22 13:10:33,845 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 545 transitions. Word has length 44 [2021-12-22 13:10:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:33,845 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 545 transitions. [2021-12-22 13:10:33,846 INFO L471 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) [2021-12-22 13:10:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 545 transitions. [2021-12-22 13:10:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:10:33,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:33,849 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:33,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:10:33,849 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash 215630895, now seen corresponding path program 1 times [2021-12-22 13:10:33,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:33,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493211834] [2021-12-22 13:10:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:33,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:10:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:33,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:33,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493211834] [2021-12-22 13:10:33,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493211834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:33,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:33,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:33,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638479352] [2021-12-22 13:10:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:33,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:33,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:33,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:33,970 INFO L87 Difference]: Start difference. First operand 365 states and 545 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) [2021-12-22 13:10:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:34,207 INFO L93 Difference]: Finished difference Result 613 states and 885 transitions. [2021-12-22 13:10:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:34,210 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 [2021-12-22 13:10:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:34,216 INFO L225 Difference]: With dead ends: 613 [2021-12-22 13:10:34,216 INFO L226 Difference]: Without dead ends: 489 [2021-12-22 13:10:34,221 INFO L932 BasicCegarLoop]: 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 [2021-12-22 13:10:34,223 INFO L933 BasicCegarLoop]: 500 mSDtfsCounter, 249 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:34,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1022 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:10:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-12-22 13:10:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 432. [2021-12-22 13:10:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 381 states have (on average 1.4776902887139107) internal successors, (563), 386 states have internal predecessors, (563), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2021-12-22 13:10:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 635 transitions. [2021-12-22 13:10:34,255 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 635 transitions. Word has length 45 [2021-12-22 13:10:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:34,255 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 635 transitions. [2021-12-22 13:10:34,255 INFO L471 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) [2021-12-22 13:10:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 635 transitions. [2021-12-22 13:10:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:10:34,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:34,263 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:34,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:10:34,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1068726566, now seen corresponding path program 1 times [2021-12-22 13:10:34,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:34,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26624535] [2021-12-22 13:10:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:34,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:10:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:34,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:34,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26624535] [2021-12-22 13:10:34,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26624535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:34,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:34,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:34,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302940692] [2021-12-22 13:10:34,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:34,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:34,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:34,340 INFO L87 Difference]: Start difference. First operand 432 states and 635 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) [2021-12-22 13:10:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:34,465 INFO L93 Difference]: Finished difference Result 840 states and 1194 transitions. [2021-12-22 13:10:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:34,466 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 [2021-12-22 13:10:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:34,468 INFO L225 Difference]: With dead ends: 840 [2021-12-22 13:10:34,468 INFO L226 Difference]: Without dead ends: 649 [2021-12-22 13:10:34,469 INFO L932 BasicCegarLoop]: 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 [2021-12-22 13:10:34,470 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 606 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:34,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 785 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-22 13:10:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 597. [2021-12-22 13:10:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 527 states have (on average 1.4288425047438331) internal successors, (753), 535 states have internal predecessors, (753), 46 states have call successors, (46), 22 states have call predecessors, (46), 22 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2021-12-22 13:10:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 853 transitions. [2021-12-22 13:10:34,491 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 853 transitions. Word has length 45 [2021-12-22 13:10:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:34,491 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 853 transitions. [2021-12-22 13:10:34,491 INFO L471 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) [2021-12-22 13:10:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 853 transitions. [2021-12-22 13:10:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 13:10:34,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:34,493 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:34,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:10:34,493 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash -642295496, now seen corresponding path program 1 times [2021-12-22 13:10:34,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:34,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686203305] [2021-12-22 13:10:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:34,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:10:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:10:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:10:34,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:34,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686203305] [2021-12-22 13:10:34,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686203305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:34,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:34,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:34,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558487408] [2021-12-22 13:10:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:34,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:34,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:34,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:34,558 INFO L87 Difference]: Start difference. First operand 597 states and 853 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) [2021-12-22 13:10:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:34,786 INFO L93 Difference]: Finished difference Result 1181 states and 1638 transitions. [2021-12-22 13:10:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:34,786 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 [2021-12-22 13:10:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:34,789 INFO L225 Difference]: With dead ends: 1181 [2021-12-22 13:10:34,790 INFO L226 Difference]: Without dead ends: 825 [2021-12-22 13:10:34,790 INFO L932 BasicCegarLoop]: 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 [2021-12-22 13:10:34,791 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 233 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:34,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1055 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:10:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-12-22 13:10:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 787. [2021-12-22 13:10:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 693 states have (on average 1.3751803751803753) internal successors, (953), 703 states have internal predecessors, (953), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2021-12-22 13:10:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1091 transitions. [2021-12-22 13:10:34,813 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1091 transitions. Word has length 62 [2021-12-22 13:10:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:34,813 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1091 transitions. [2021-12-22 13:10:34,813 INFO L471 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) [2021-12-22 13:10:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1091 transitions. [2021-12-22 13:10:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 13:10:34,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:34,815 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:34,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:10:34,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash -897620696, now seen corresponding path program 1 times [2021-12-22 13:10:34,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:34,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665968266] [2021-12-22 13:10:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:34,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:10:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:10:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:10:34,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:34,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665968266] [2021-12-22 13:10:34,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665968266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:34,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:34,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:34,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601572945] [2021-12-22 13:10:34,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:34,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:34,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:34,859 INFO L87 Difference]: Start difference. First operand 787 states and 1091 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) [2021-12-22 13:10:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:34,968 INFO L93 Difference]: Finished difference Result 1440 states and 1944 transitions. [2021-12-22 13:10:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:34,968 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 [2021-12-22 13:10:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:34,972 INFO L225 Difference]: With dead ends: 1440 [2021-12-22 13:10:34,972 INFO L226 Difference]: Without dead ends: 986 [2021-12-22 13:10:34,973 INFO L932 BasicCegarLoop]: 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 [2021-12-22 13:10:34,974 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 593 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:34,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 782 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-12-22 13:10:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 931. [2021-12-22 13:10:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 821 states have (on average 1.3447015834348355) internal successors, (1104), 833 states have internal predecessors, (1104), 68 states have call successors, (68), 36 states have call predecessors, (68), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2021-12-22 13:10:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1264 transitions. [2021-12-22 13:10:34,999 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1264 transitions. Word has length 67 [2021-12-22 13:10:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:35,000 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1264 transitions. [2021-12-22 13:10:35,000 INFO L471 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) [2021-12-22 13:10:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1264 transitions. [2021-12-22 13:10:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:10:35,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:35,002 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:35,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:10:35,002 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:35,003 INFO L85 PathProgramCache]: Analyzing trace with hash -252493793, now seen corresponding path program 1 times [2021-12-22 13:10:35,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:35,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416312900] [2021-12-22 13:10:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:35,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:10:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:10:35,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:35,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416312900] [2021-12-22 13:10:35,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416312900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:35,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776267068] [2021-12-22 13:10:35,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:35,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:35,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:35,068 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) [2021-12-22 13:10:35,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:10:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:10:35,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:35,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:10:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:10:35,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776267068] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:35,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:10:35,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-22 13:10:35,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449622585] [2021-12-22 13:10:35,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:35,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:35,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:35,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:35,481 INFO L87 Difference]: Start difference. First operand 931 states and 1264 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) [2021-12-22 13:10:35,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:35,598 INFO L93 Difference]: Finished difference Result 987 states and 1332 transitions. [2021-12-22 13:10:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:10:35,599 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 [2021-12-22 13:10:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:35,603 INFO L225 Difference]: With dead ends: 987 [2021-12-22 13:10:35,603 INFO L226 Difference]: Without dead ends: 984 [2021-12-22 13:10:35,604 INFO L932 BasicCegarLoop]: 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 [2021-12-22 13:10:35,609 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 811 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:35,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 546 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-12-22 13:10:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 930. [2021-12-22 13:10:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 821 states have (on average 1.3422655298416566) internal successors, (1102), 832 states have internal predecessors, (1102), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2021-12-22 13:10:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1261 transitions. [2021-12-22 13:10:35,645 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1261 transitions. Word has length 68 [2021-12-22 13:10:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:35,647 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 1261 transitions. [2021-12-22 13:10:35,647 INFO L471 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) [2021-12-22 13:10:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1261 transitions. [2021-12-22 13:10:35,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:10:35,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:35,649 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:35,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:35,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-22 13:10:35,864 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:35,865 INFO L85 PathProgramCache]: Analyzing trace with hash 761646347, now seen corresponding path program 1 times [2021-12-22 13:10:35,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:35,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047138013] [2021-12-22 13:10:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:35,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:10:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:10:35,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:35,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047138013] [2021-12-22 13:10:35,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047138013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:35,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872727258] [2021-12-22 13:10:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:35,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:35,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:35,972 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) [2021-12-22 13:10:35,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:10:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:36,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:10:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:36,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:10:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:10:36,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872727258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:10:36,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:10:36,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-22 13:10:36,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794333312] [2021-12-22 13:10:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:10:36,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:10:36,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:10:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:10:36,466 INFO L87 Difference]: Start difference. First operand 930 states and 1261 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) [2021-12-22 13:10:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:37,332 INFO L93 Difference]: Finished difference Result 2630 states and 3481 transitions. [2021-12-22 13:10:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 13:10:37,332 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 [2021-12-22 13:10:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:37,342 INFO L225 Difference]: With dead ends: 2630 [2021-12-22 13:10:37,355 INFO L226 Difference]: Without dead ends: 2086 [2021-12-22 13:10:37,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 13:10:37,359 INFO L933 BasicCegarLoop]: 571 mSDtfsCounter, 1343 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 2857 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:37,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 2857 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:10:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-12-22 13:10:37,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1319. [2021-12-22 13:10:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1171 states have (on average 1.3116994022203246) internal successors, (1536), 1190 states have internal predecessors, (1536), 87 states have call successors, (87), 50 states have call predecessors, (87), 59 states have return successors, (126), 79 states have call predecessors, (126), 84 states have call successors, (126) [2021-12-22 13:10:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1749 transitions. [2021-12-22 13:10:37,425 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1749 transitions. Word has length 69 [2021-12-22 13:10:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:37,425 INFO L470 AbstractCegarLoop]: Abstraction has 1319 states and 1749 transitions. [2021-12-22 13:10:37,426 INFO L471 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) [2021-12-22 13:10:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1749 transitions. [2021-12-22 13:10:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 13:10:37,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:37,428 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:37,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 13:10:37,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-22 13:10:37,644 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:37,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:37,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1915961298, now seen corresponding path program 1 times [2021-12-22 13:10:37,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:37,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951280639] [2021-12-22 13:10:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:37,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:10:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:10:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 13:10:37,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:37,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951280639] [2021-12-22 13:10:37,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951280639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:37,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:37,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:10:37,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342855481] [2021-12-22 13:10:37,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:37,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:10:37,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:37,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:10:37,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:10:37,713 INFO L87 Difference]: Start difference. First operand 1319 states and 1749 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 13:10:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:37,822 INFO L93 Difference]: Finished difference Result 2084 states and 2736 transitions. [2021-12-22 13:10:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:10:37,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-22 13:10:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:37,828 INFO L225 Difference]: With dead ends: 2084 [2021-12-22 13:10:37,828 INFO L226 Difference]: Without dead ends: 1239 [2021-12-22 13:10:37,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:10:37,830 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 608 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:37,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 799 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:10:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-12-22 13:10:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1182. [2021-12-22 13:10:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1050 states have (on average 1.3123809523809524) internal successors, (1378), 1068 states have internal predecessors, (1378), 79 states have call successors, (79), 44 states have call predecessors, (79), 51 states have return successors, (112), 70 states have call predecessors, (112), 76 states have call successors, (112) [2021-12-22 13:10:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1569 transitions. [2021-12-22 13:10:37,870 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1569 transitions. Word has length 88 [2021-12-22 13:10:37,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:37,870 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 1569 transitions. [2021-12-22 13:10:37,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 13:10:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1569 transitions. [2021-12-22 13:10:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 13:10:37,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:37,873 INFO L514 BasicCegarLoop]: 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] [2021-12-22 13:10:37,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:10:37,873 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1247723609, now seen corresponding path program 1 times [2021-12-22 13:10:37,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:37,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437280947] [2021-12-22 13:10:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:37,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:10:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:10:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:10:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:10:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:10:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:10:37,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437280947] [2021-12-22 13:10:37,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437280947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:10:37,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321929005] [2021-12-22 13:10:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:37,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:10:37,920 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) [2021-12-22 13:10:37,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:10:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:10:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:10:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 13:10:38,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:10:38,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321929005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:38,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:10:38,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-22 13:10:38,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579549788] [2021-12-22 13:10:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:38,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:10:38,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:38,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:10:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:10:38,124 INFO L87 Difference]: Start difference. First operand 1182 states and 1569 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) [2021-12-22 13:10:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:38,152 INFO L93 Difference]: Finished difference Result 1561 states and 2037 transitions. [2021-12-22 13:10:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:10:38,153 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 [2021-12-22 13:10:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:38,154 INFO L225 Difference]: With dead ends: 1561 [2021-12-22 13:10:38,154 INFO L226 Difference]: Without dead ends: 235 [2021-12-22 13:10:38,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:10:38,156 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 62 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 928 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 [2021-12-22 13:10:38,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 928 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:10:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-22 13:10:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2021-12-22 13:10:38,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5533980582524272) internal successors, (320), 208 states have internal predecessors, (320), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 13:10:38,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 362 transitions. [2021-12-22 13:10:38,162 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 362 transitions. Word has length 103 [2021-12-22 13:10:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:38,162 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 362 transitions. [2021-12-22 13:10:38,162 INFO L471 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) [2021-12-22 13:10:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 362 transitions. [2021-12-22 13:10:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:38,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:38,163 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:38,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:10:38,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:10:38,380 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash 490472779, now seen corresponding path program 1 times [2021-12-22 13:10:38,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:38,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357552960] [2021-12-22 13:10:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:38,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:38,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:38,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357552960] [2021-12-22 13:10:38,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357552960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:38,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:38,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:10:38,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193753601] [2021-12-22 13:10:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:38,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:10:38,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:38,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:10:38,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:10:38,453 INFO L87 Difference]: Start difference. First operand 235 states and 362 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:10:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:38,936 INFO L93 Difference]: Finished difference Result 536 states and 840 transitions. [2021-12-22 13:10:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:10:38,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2021-12-22 13:10:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:38,938 INFO L225 Difference]: With dead ends: 536 [2021-12-22 13:10:38,938 INFO L226 Difference]: Without dead ends: 311 [2021-12-22 13:10:38,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:10:38,939 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 591 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:38,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 661 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:10:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-22 13:10:38,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 235. [2021-12-22 13:10:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 208 states have internal predecessors, (319), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-22 13:10:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 361 transitions. [2021-12-22 13:10:38,948 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 361 transitions. Word has length 113 [2021-12-22 13:10:38,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:38,948 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 361 transitions. [2021-12-22 13:10:38,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:10:38,948 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 361 transitions. [2021-12-22 13:10:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:38,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:38,949 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:38,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:10:38,949 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:38,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1937785843, now seen corresponding path program 1 times [2021-12-22 13:10:38,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:38,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616095458] [2021-12-22 13:10:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:38,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:38,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:39,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616095458] [2021-12-22 13:10:39,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616095458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:39,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:39,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:10:39,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274312909] [2021-12-22 13:10:39,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:39,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:10:39,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:39,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:10:39,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:10:39,016 INFO L87 Difference]: Start difference. First operand 235 states and 361 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-12-22 13:10:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:39,916 INFO L93 Difference]: Finished difference Result 833 states and 1312 transitions. [2021-12-22 13:10:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:10:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2021-12-22 13:10:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:39,919 INFO L225 Difference]: With dead ends: 833 [2021-12-22 13:10:39,919 INFO L226 Difference]: Without dead ends: 613 [2021-12-22 13:10:39,919 INFO L932 BasicCegarLoop]: 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 [2021-12-22 13:10:39,920 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 879 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:39,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 1072 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:10:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-12-22 13:10:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 460. [2021-12-22 13:10:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 409 states have (on average 1.5623471882640587) internal successors, (639), 412 states have internal predecessors, (639), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2021-12-22 13:10:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 714 transitions. [2021-12-22 13:10:39,936 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 714 transitions. Word has length 113 [2021-12-22 13:10:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:39,936 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 714 transitions. [2021-12-22 13:10:39,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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) [2021-12-22 13:10:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 714 transitions. [2021-12-22 13:10:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:39,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:39,937 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:39,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:10:39,938 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -943533047, now seen corresponding path program 1 times [2021-12-22 13:10:39,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:39,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129272035] [2021-12-22 13:10:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:39,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:39,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:40,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:40,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:40,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129272035] [2021-12-22 13:10:40,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129272035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:40,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:40,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:40,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353190163] [2021-12-22 13:10:40,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:40,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:40,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:40,005 INFO L87 Difference]: Start difference. First operand 460 states and 714 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:41,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:41,334 INFO L93 Difference]: Finished difference Result 1366 states and 2152 transitions. [2021-12-22 13:10:41,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:41,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:10:41,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:41,338 INFO L225 Difference]: With dead ends: 1366 [2021-12-22 13:10:41,338 INFO L226 Difference]: Without dead ends: 921 [2021-12-22 13:10:41,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:41,339 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 883 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:41,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 1840 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:10:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-12-22 13:10:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 670. [2021-12-22 13:10:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 597 states have (on average 1.5561139028475712) internal successors, (929), 601 states have internal predecessors, (929), 52 states have call successors, (52), 19 states have call predecessors, (52), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-22 13:10:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1036 transitions. [2021-12-22 13:10:41,364 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1036 transitions. Word has length 113 [2021-12-22 13:10:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:41,364 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1036 transitions. [2021-12-22 13:10:41,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1036 transitions. [2021-12-22 13:10:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:41,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:41,366 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:41,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:10:41,366 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash 407852171, now seen corresponding path program 1 times [2021-12-22 13:10:41,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:41,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025037668] [2021-12-22 13:10:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:41,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:41,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:41,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025037668] [2021-12-22 13:10:41,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025037668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:41,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:41,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:41,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599680724] [2021-12-22 13:10:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:41,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:41,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:41,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:41,438 INFO L87 Difference]: Start difference. First operand 670 states and 1036 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:42,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:42,684 INFO L93 Difference]: Finished difference Result 2151 states and 3382 transitions. [2021-12-22 13:10:42,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:42,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:10:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:42,690 INFO L225 Difference]: With dead ends: 2151 [2021-12-22 13:10:42,691 INFO L226 Difference]: Without dead ends: 1496 [2021-12-22 13:10:42,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:42,693 INFO L933 BasicCegarLoop]: 441 mSDtfsCounter, 946 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:42,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 1276 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:10:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-12-22 13:10:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1091. [2021-12-22 13:10:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 974 states have (on average 1.5503080082135523) internal successors, (1510), 980 states have internal predecessors, (1510), 82 states have call successors, (82), 31 states have call predecessors, (82), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2021-12-22 13:10:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1685 transitions. [2021-12-22 13:10:42,759 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1685 transitions. Word has length 113 [2021-12-22 13:10:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:42,759 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1685 transitions. [2021-12-22 13:10:42,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1685 transitions. [2021-12-22 13:10:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:42,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:42,761 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:42,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:10:42,761 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1211122743, now seen corresponding path program 1 times [2021-12-22 13:10:42,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:42,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858700144] [2021-12-22 13:10:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:42,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:42,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:42,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858700144] [2021-12-22 13:10:42,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858700144] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:42,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:42,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:42,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436954077] [2021-12-22 13:10:42,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:42,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:42,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:42,846 INFO L87 Difference]: Start difference. First operand 1091 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:44,147 INFO L93 Difference]: Finished difference Result 3664 states and 5743 transitions. [2021-12-22 13:10:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:44,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:10:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:44,157 INFO L225 Difference]: With dead ends: 3664 [2021-12-22 13:10:44,158 INFO L226 Difference]: Without dead ends: 2588 [2021-12-22 13:10:44,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:44,161 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 878 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:44,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 1824 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:10:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-12-22 13:10:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1934. [2021-12-22 13:10:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1729 states have (on average 1.545401966454598) internal successors, (2672), 1739 states have internal predecessors, (2672), 142 states have call successors, (142), 55 states have call predecessors, (142), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2021-12-22 13:10:44,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2989 transitions. [2021-12-22 13:10:44,267 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2989 transitions. Word has length 113 [2021-12-22 13:10:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:44,267 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 2989 transitions. [2021-12-22 13:10:44,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2989 transitions. [2021-12-22 13:10:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:44,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:44,269 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:44,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:10:44,269 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:44,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2094631733, now seen corresponding path program 1 times [2021-12-22 13:10:44,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:44,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167024728] [2021-12-22 13:10:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:44,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:44,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:44,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167024728] [2021-12-22 13:10:44,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167024728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:44,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:44,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:44,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453338743] [2021-12-22 13:10:44,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:44,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:44,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:44,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:44,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:44,342 INFO L87 Difference]: Start difference. First operand 1934 states and 2989 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:45,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:45,851 INFO L93 Difference]: Finished difference Result 6682 states and 10469 transitions. [2021-12-22 13:10:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:10:45,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:45,868 INFO L225 Difference]: With dead ends: 6682 [2021-12-22 13:10:45,868 INFO L226 Difference]: Without dead ends: 4763 [2021-12-22 13:10:45,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:45,874 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 873 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1712 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:45,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 1816 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1712 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:10:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2021-12-22 13:10:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 3634. [2021-12-22 13:10:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3253 states have (on average 1.5431909007070397) internal successors, (5020), 3271 states have internal predecessors, (5020), 262 states have call successors, (262), 103 states have call predecessors, (262), 118 states have return successors, (357), 275 states have call predecessors, (357), 260 states have call successors, (357) [2021-12-22 13:10:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5639 transitions. [2021-12-22 13:10:46,033 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5639 transitions. Word has length 113 [2021-12-22 13:10:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:46,033 INFO L470 AbstractCegarLoop]: Abstraction has 3634 states and 5639 transitions. [2021-12-22 13:10:46,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5639 transitions. [2021-12-22 13:10:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:46,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:46,036 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:46,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:10:46,036 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:46,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 259753549, now seen corresponding path program 1 times [2021-12-22 13:10:46,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:46,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941573271] [2021-12-22 13:10:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:46,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:46,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:46,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941573271] [2021-12-22 13:10:46,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941573271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:46,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:46,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:46,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845870466] [2021-12-22 13:10:46,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:46,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:46,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:46,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:46,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:46,130 INFO L87 Difference]: Start difference. First operand 3634 states and 5639 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:47,724 INFO L93 Difference]: Finished difference Result 12736 states and 20013 transitions. [2021-12-22 13:10:47,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:10:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:10:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:47,755 INFO L225 Difference]: With dead ends: 12736 [2021-12-22 13:10:47,755 INFO L226 Difference]: Without dead ends: 9117 [2021-12-22 13:10:47,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:10:47,765 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 872 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1811 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:47,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 1811 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:10:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2021-12-22 13:10:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 7047. [2021-12-22 13:10:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 6314 states have (on average 1.5416534684827368) internal successors, (9734), 6348 states have internal predecessors, (9734), 502 states have call successors, (502), 199 states have call predecessors, (502), 230 states have return successors, (775), 531 states have call predecessors, (775), 500 states have call successors, (775) [2021-12-22 13:10:48,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11011 transitions. [2021-12-22 13:10:48,131 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11011 transitions. Word has length 113 [2021-12-22 13:10:48,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:48,131 INFO L470 AbstractCegarLoop]: Abstraction has 7047 states and 11011 transitions. [2021-12-22 13:10:48,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11011 transitions. [2021-12-22 13:10:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:48,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:48,136 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:48,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:10:48,136 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2136816779, now seen corresponding path program 1 times [2021-12-22 13:10:48,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:48,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741008664] [2021-12-22 13:10:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:48,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:48,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:48,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:48,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:48,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:48,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:48,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:48,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741008664] [2021-12-22 13:10:48,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741008664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:48,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:48,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:48,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387003399] [2021-12-22 13:10:48,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:48,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:48,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:48,219 INFO L87 Difference]: Start difference. First operand 7047 states and 11011 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:50,560 INFO L93 Difference]: Finished difference Result 27819 states and 43773 transitions. [2021-12-22 13:10:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:10:50,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:10:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:50,617 INFO L225 Difference]: With dead ends: 27819 [2021-12-22 13:10:50,617 INFO L226 Difference]: Without dead ends: 20787 [2021-12-22 13:10:50,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:10:50,638 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 1123 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:50,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 1796 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:10:50,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20787 states. [2021-12-22 13:10:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20787 to 13808. [2021-12-22 13:10:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 12403 states have (on average 1.54349754091752) internal successors, (19144), 12469 states have internal predecessors, (19144), 950 states have call successors, (950), 391 states have call predecessors, (950), 454 states have return successors, (1741), 1011 states have call predecessors, (1741), 948 states have call successors, (1741) [2021-12-22 13:10:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 21835 transitions. [2021-12-22 13:10:51,480 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 21835 transitions. Word has length 113 [2021-12-22 13:10:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:51,480 INFO L470 AbstractCegarLoop]: Abstraction has 13808 states and 21835 transitions. [2021-12-22 13:10:51,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 21835 transitions. [2021-12-22 13:10:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:51,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:51,488 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:51,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:10:51,489 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:51,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1366083213, now seen corresponding path program 1 times [2021-12-22 13:10:51,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:51,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252210937] [2021-12-22 13:10:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:51,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:51,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:51,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:51,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:51,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:51,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:51,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252210937] [2021-12-22 13:10:51,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252210937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:51,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:51,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:51,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168846226] [2021-12-22 13:10:51,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:51,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:51,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:51,557 INFO L87 Difference]: Start difference. First operand 13808 states and 21835 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:10:55,264 INFO L93 Difference]: Finished difference Result 53954 states and 85811 transitions. [2021-12-22 13:10:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:10:55,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:10:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:10:55,400 INFO L225 Difference]: With dead ends: 53954 [2021-12-22 13:10:55,400 INFO L226 Difference]: Without dead ends: 40161 [2021-12-22 13:10:55,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:10:55,449 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 922 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:10:55,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 1879 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:10:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40161 states. [2021-12-22 13:10:57,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40161 to 26657. [2021-12-22 13:10:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26657 states, 23940 states have (on average 1.5389306599832915) internal successors, (36842), 24070 states have internal predecessors, (36842), 1814 states have call successors, (1814), 775 states have call predecessors, (1814), 902 states have return successors, (4127), 1939 states have call predecessors, (4127), 1812 states have call successors, (4127) [2021-12-22 13:10:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26657 states to 26657 states and 42783 transitions. [2021-12-22 13:10:57,433 INFO L78 Accepts]: Start accepts. Automaton has 26657 states and 42783 transitions. Word has length 113 [2021-12-22 13:10:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:10:57,433 INFO L470 AbstractCegarLoop]: Abstraction has 26657 states and 42783 transitions. [2021-12-22 13:10:57,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:10:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 26657 states and 42783 transitions. [2021-12-22 13:10:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:10:57,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:10:57,449 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:10:57,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:10:57,449 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:10:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:10:57,450 INFO L85 PathProgramCache]: Analyzing trace with hash 371389515, now seen corresponding path program 1 times [2021-12-22 13:10:57,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:10:57,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145214533] [2021-12-22 13:10:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:10:57,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:10:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:57,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:10:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:57,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:10:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:57,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:10:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:10:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:10:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:10:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:10:57,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:10:57,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145214533] [2021-12-22 13:10:57,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145214533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:10:57,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:10:57,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:10:57,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131898771] [2021-12-22 13:10:57,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:10:57,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:10:57,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:10:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:10:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:10:57,523 INFO L87 Difference]: Start difference. First operand 26657 states and 42783 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:11:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:03,852 INFO L93 Difference]: Finished difference Result 103121 states and 166425 transitions. [2021-12-22 13:11:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:11:03,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:11:03,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:04,151 INFO L225 Difference]: With dead ends: 103121 [2021-12-22 13:11:04,151 INFO L226 Difference]: Without dead ends: 76479 [2021-12-22 13:11:04,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:11:04,233 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 1043 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 1786 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:04,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1063 Valid, 1786 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:11:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76479 states. [2021-12-22 13:11:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76479 to 52930. [2021-12-22 13:11:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52930 states, 47653 states have (on average 1.5413929868004113) internal successors, (73452), 47911 states have internal predecessors, (73452), 3478 states have call successors, (3478), 1543 states have call predecessors, (3478), 1798 states have return successors, (10293), 3731 states have call predecessors, (10293), 3476 states have call successors, (10293) [2021-12-22 13:11:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52930 states to 52930 states and 87223 transitions. [2021-12-22 13:11:07,951 INFO L78 Accepts]: Start accepts. Automaton has 52930 states and 87223 transitions. Word has length 113 [2021-12-22 13:11:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:07,951 INFO L470 AbstractCegarLoop]: Abstraction has 52930 states and 87223 transitions. [2021-12-22 13:11:07,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:11:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 52930 states and 87223 transitions. [2021-12-22 13:11:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:11:07,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:07,978 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:07,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:11:07,978 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:07,979 INFO L85 PathProgramCache]: Analyzing trace with hash -214886707, now seen corresponding path program 1 times [2021-12-22 13:11:07,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:07,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888899948] [2021-12-22 13:11:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:07,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:08,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:11:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:08,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:11:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:08,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:11:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:08,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:11:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:08,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888899948] [2021-12-22 13:11:08,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888899948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:08,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:08,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:08,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408326098] [2021-12-22 13:11:08,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:08,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:08,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:08,050 INFO L87 Difference]: Start difference. First operand 52930 states and 87223 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:11:19,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:19,602 INFO L93 Difference]: Finished difference Result 200880 states and 333039 transitions. [2021-12-22 13:11:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:11:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2021-12-22 13:11:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:20,159 INFO L225 Difference]: With dead ends: 200880 [2021-12-22 13:11:20,160 INFO L226 Difference]: Without dead ends: 147965 [2021-12-22 13:11:20,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:11:20,311 INFO L933 BasicCegarLoop]: 476 mSDtfsCounter, 955 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:20,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 1307 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:11:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147965 states. [2021-12-22 13:11:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147965 to 105347. [2021-12-22 13:11:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105347 states, 95078 states have (on average 1.543974421001704) internal successors, (146798), 95592 states have internal predecessors, (146798), 6678 states have call successors, (6678), 3079 states have call predecessors, (6678), 3590 states have return successors, (26871), 7187 states have call predecessors, (26871), 6676 states have call successors, (26871) [2021-12-22 13:11:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105347 states to 105347 states and 180347 transitions. [2021-12-22 13:11:27,946 INFO L78 Accepts]: Start accepts. Automaton has 105347 states and 180347 transitions. Word has length 113 [2021-12-22 13:11:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:27,946 INFO L470 AbstractCegarLoop]: Abstraction has 105347 states and 180347 transitions. [2021-12-22 13:11:27,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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) [2021-12-22 13:11:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 105347 states and 180347 transitions. [2021-12-22 13:11:28,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 13:11:28,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:28,000 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:11:28,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:11:28,001 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:28,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2121505803, now seen corresponding path program 1 times [2021-12-22 13:11:28,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:28,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449452670] [2021-12-22 13:11:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:28,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:11:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 13:11:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 13:11:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:11:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-22 13:11:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:11:28,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:28,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449452670] [2021-12-22 13:11:28,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449452670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:28,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:28,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:11:28,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646818274] [2021-12-22 13:11:28,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:28,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:11:28,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:28,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:11:28,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:11:28,115 INFO L87 Difference]: Start difference. First operand 105347 states and 180347 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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)