./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.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.14.cil.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 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:11:52,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:11:52,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:11:52,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:11:52,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:11:52,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:11:52,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:11:52,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:11:52,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:11:52,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:11:52,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:11:52,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:11:52,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:11:52,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:11:52,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:11:52,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:11:52,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:11:52,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:11:52,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:11:52,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:11:52,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:11:52,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:11:52,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:11:52,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:11:52,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:11:52,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:11:52,678 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:11:52,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:11:52,679 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:11:52,680 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:11:52,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:11:52,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:11:52,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:11:52,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:11:52,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:11:52,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:11:52,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:11:52,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:11:52,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:11:52,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:11:52,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:11:52,690 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:11:52,724 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:11:52,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:11:52,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:11:52,725 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:11:52,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:11:52,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:11:52,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:11:52,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:11:52,727 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:11:52,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:11:52,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:11:52,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:11:52,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:11:52,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:11:52,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:11:52,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:11:52,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:11:52,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:11:52,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:11:52,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:11:52,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:11:52,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:11:52,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:11:52,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:11:52,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:11:52,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:11:52,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:11:52,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:11:52,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:11:52,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:11:52,732 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:11:52,732 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:11:52,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:11:52,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:11:52,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bef365bd29db1ac20249b1e3139137560ac4134ff54f631658e57cc437eb0ce [2021-12-22 13:11:52,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:11:52,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:11:52,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:11:52,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:11:52,982 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:11:52,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-22 13:11:53,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/355ae1d03/3b8890c7a11f41c693920f2a998a8390/FLAGcc135536c [2021-12-22 13:11:53,482 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:11:53,487 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-22 13:11:53,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/355ae1d03/3b8890c7a11f41c693920f2a998a8390/FLAGcc135536c [2021-12-22 13:11:53,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/355ae1d03/3b8890c7a11f41c693920f2a998a8390 [2021-12-22 13:11:53,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:11:53,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:11:53,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:11:53,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:11:53,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:11:53,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:53,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672d8cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53, skipping insertion in model container [2021-12-22 13:11:53,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:53,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:11:53,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:11:53,739 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.14.cil.c[913,926] [2021-12-22 13:11:53,771 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.14.cil.c[5977,5990] [2021-12-22 13:11:53,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:11:53,858 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:11:53,870 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.14.cil.c[913,926] [2021-12-22 13:11:53,884 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.14.cil.c[5977,5990] [2021-12-22 13:11:53,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:11:53,954 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:11:53,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53 WrapperNode [2021-12-22 13:11:53,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:11:53,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:11:53,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:11:53,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:11:53,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,065 INFO L137 Inliner]: procedures = 72, calls = 85, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 1058 [2021-12-22 13:11:54,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:11:54,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:11:54,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:11:54,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:11:54,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:11:54,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:11:54,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:11:54,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:11:54,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (1/1) ... [2021-12-22 13:11:54,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:11:54,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:54,192 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 13:11:54,215 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 13:11:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:11:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:11:54,229 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:11:54,229 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-22 13:11:54,229 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-22 13:11:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:11:54,230 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:11:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:11:54,230 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:11:54,230 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:11:54,230 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:11:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:11:54,231 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:11:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:11:54,231 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:11:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:11:54,231 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:11:54,231 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:11:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:11:54,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:11:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:11:54,232 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:11:54,232 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:11:54,232 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:11:54,401 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:11:54,403 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:11:55,018 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:11:55,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:11:55,030 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-22 13:11:55,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:11:55 BoogieIcfgContainer [2021-12-22 13:11:55,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:11:55,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:11:55,034 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:11:55,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:11:55,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:11:53" (1/3) ... [2021-12-22 13:11:55,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1d483f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:11:55, skipping insertion in model container [2021-12-22 13:11:55,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:11:53" (2/3) ... [2021-12-22 13:11:55,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1d483f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:11:55, skipping insertion in model container [2021-12-22 13:11:55,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:11:55" (3/3) ... [2021-12-22 13:11:55,040 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.14.cil.c [2021-12-22 13:11:55,044 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:11:55,044 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:11:55,083 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:11:55,088 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 13:11:55,089 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:11:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-22 13:11:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 13:11:55,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:55,122 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 13:11:55,123 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:55,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2140149972, now seen corresponding path program 1 times [2021-12-22 13:11:55,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:55,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009132711] [2021-12-22 13:11:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:55,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:55,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 13:11:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,433 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 13:11:55,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009132711] [2021-12-22 13:11:55,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009132711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:55,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:55,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:55,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592933842] [2021-12-22 13:11:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:55,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:55,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:55,478 INFO L87 Difference]: Start difference. First operand has 460 states, 413 states have (on average 1.6513317191283292) internal successors, (682), 420 states have internal predecessors, (682), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) 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 13:11:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:55,816 INFO L93 Difference]: Finished difference Result 964 states and 1568 transitions. [2021-12-22 13:11:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:55,818 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 13:11:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:55,835 INFO L225 Difference]: With dead ends: 964 [2021-12-22 13:11:55,836 INFO L226 Difference]: Without dead ends: 519 [2021-12-22 13:11:55,845 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 13:11:55,849 INFO L933 BasicCegarLoop]: 713 mSDtfsCounter, 953 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:55,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1133 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:11:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-22 13:11:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 513. [2021-12-22 13:11:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 462 states have (on average 1.5346320346320346) internal successors, (709), 467 states have internal predecessors, (709), 38 states have call successors, (38), 12 states have call predecessors, (38), 11 states have return successors, (40), 34 states have call predecessors, (40), 34 states have call successors, (40) [2021-12-22 13:11:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 787 transitions. [2021-12-22 13:11:55,919 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 787 transitions. Word has length 44 [2021-12-22 13:11:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:55,920 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 787 transitions. [2021-12-22 13:11:55,920 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 13:11:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 787 transitions. [2021-12-22 13:11:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:11:55,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:55,923 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 13:11:55,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:11:55,924 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:55,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1297015323, now seen corresponding path program 1 times [2021-12-22 13:11:55,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:55,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192885178] [2021-12-22 13:11:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:55,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:55,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:11:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:56,005 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 13:11:56,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:56,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192885178] [2021-12-22 13:11:56,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192885178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:56,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:56,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:56,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530655784] [2021-12-22 13:11:56,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:56,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:56,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:56,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:56,011 INFO L87 Difference]: Start difference. First operand 513 states and 787 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 13:11:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:56,522 INFO L93 Difference]: Finished difference Result 761 states and 1127 transitions. [2021-12-22 13:11:56,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:56,523 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 13:11:56,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:56,529 INFO L225 Difference]: With dead ends: 761 [2021-12-22 13:11:56,530 INFO L226 Difference]: Without dead ends: 637 [2021-12-22 13:11:56,534 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 13:11:56,535 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 369 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:56,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 1496 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:11:56,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-12-22 13:11:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 580. [2021-12-22 13:11:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 523 states have (on average 1.5162523900573615) internal successors, (793), 528 states have internal predecessors, (793), 41 states have call successors, (41), 15 states have call predecessors, (41), 14 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2021-12-22 13:11:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 877 transitions. [2021-12-22 13:11:56,579 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 877 transitions. Word has length 45 [2021-12-22 13:11:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:56,580 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 877 transitions. [2021-12-22 13:11:56,580 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 13:11:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 877 transitions. [2021-12-22 13:11:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 13:11:56,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:56,588 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 13:11:56,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:11:56,589 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:56,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1713594512, now seen corresponding path program 1 times [2021-12-22 13:11:56,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:56,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213999637] [2021-12-22 13:11:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:56,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:56,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:56,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 13:11:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:56,677 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 13:11:56,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:56,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213999637] [2021-12-22 13:11:56,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213999637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:56,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:56,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:56,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477714030] [2021-12-22 13:11:56,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:56,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:56,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:56,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:56,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:56,680 INFO L87 Difference]: Start difference. First operand 580 states and 877 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 13:11:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:56,863 INFO L93 Difference]: Finished difference Result 988 states and 1436 transitions. [2021-12-22 13:11:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:56,863 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 13:11:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:56,868 INFO L225 Difference]: With dead ends: 988 [2021-12-22 13:11:56,868 INFO L226 Difference]: Without dead ends: 797 [2021-12-22 13:11:56,869 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 13:11:56,870 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 962 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:56,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 1137 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:11:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-12-22 13:11:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 745. [2021-12-22 13:11:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 669 states have (on average 1.4693572496263079) internal successors, (983), 677 states have internal predecessors, (983), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (60), 46 states have call predecessors, (60), 48 states have call successors, (60) [2021-12-22 13:11:56,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1095 transitions. [2021-12-22 13:11:56,903 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1095 transitions. Word has length 45 [2021-12-22 13:11:56,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:56,904 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1095 transitions. [2021-12-22 13:11:56,904 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 13:11:56,904 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1095 transitions. [2021-12-22 13:11:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 13:11:56,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:56,906 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 13:11:56,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:11:56,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:56,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1877488540, now seen corresponding path program 1 times [2021-12-22 13:11:56,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:56,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876140336] [2021-12-22 13:11:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:56,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:56,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:56,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 13:11:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:56,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:11:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:56,965 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 13:11:56,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:56,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876140336] [2021-12-22 13:11:56,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876140336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:56,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:56,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:56,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7793683] [2021-12-22 13:11:56,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:56,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:56,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:56,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:56,968 INFO L87 Difference]: Start difference. First operand 745 states and 1095 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 13:11:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:57,393 INFO L93 Difference]: Finished difference Result 1329 states and 1880 transitions. [2021-12-22 13:11:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:57,394 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 13:11:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:57,399 INFO L225 Difference]: With dead ends: 1329 [2021-12-22 13:11:57,399 INFO L226 Difference]: Without dead ends: 973 [2021-12-22 13:11:57,400 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 13:11:57,401 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 353 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:57,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1523 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:11:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-22 13:11:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 935. [2021-12-22 13:11:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 835 states have (on average 1.4167664670658682) internal successors, (1183), 845 states have internal predecessors, (1183), 66 states have call successors, (66), 30 states have call predecessors, (66), 32 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2021-12-22 13:11:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1333 transitions. [2021-12-22 13:11:57,436 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1333 transitions. Word has length 62 [2021-12-22 13:11:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:57,436 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1333 transitions. [2021-12-22 13:11:57,436 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 13:11:57,437 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1333 transitions. [2021-12-22 13:11:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 13:11:57,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:57,438 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 13:11:57,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:11:57,439 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:57,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:57,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1022869652, now seen corresponding path program 1 times [2021-12-22 13:11:57,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:57,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159767708] [2021-12-22 13:11:57,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:57,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 13:11:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:11:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,490 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 13:11:57,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159767708] [2021-12-22 13:11:57,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159767708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:11:57,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:11:57,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 13:11:57,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213179316] [2021-12-22 13:11:57,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:57,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:57,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:11:57,494 INFO L87 Difference]: Start difference. First operand 935 states and 1333 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 13:11:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:57,667 INFO L93 Difference]: Finished difference Result 1588 states and 2186 transitions. [2021-12-22 13:11:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:11:57,668 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 13:11:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:57,674 INFO L225 Difference]: With dead ends: 1588 [2021-12-22 13:11:57,674 INFO L226 Difference]: Without dead ends: 1134 [2021-12-22 13:11:57,675 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 13:11:57,677 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 949 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:57,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 1134 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:11:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-12-22 13:11:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1079. [2021-12-22 13:11:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 963 states have (on average 1.3852544132917965) internal successors, (1334), 975 states have internal predecessors, (1334), 74 states have call successors, (74), 36 states have call predecessors, (74), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-22 13:11:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1506 transitions. [2021-12-22 13:11:57,721 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1506 transitions. Word has length 67 [2021-12-22 13:11:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:57,722 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1506 transitions. [2021-12-22 13:11:57,722 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 13:11:57,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1506 transitions. [2021-12-22 13:11:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:11:57,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:57,724 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 13:11:57,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:11:57,725 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash 604966393, now seen corresponding path program 1 times [2021-12-22 13:11:57,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:57,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757737461] [2021-12-22 13:11:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:57,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:11:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:11:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,851 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 13:11:57,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:57,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757737461] [2021-12-22 13:11:57,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757737461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741649641] [2021-12-22 13:11:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:57,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:57,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:57,859 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 13:11:57,862 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 13:11:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:57,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 13:11:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:11:58,192 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 13:11:58,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:11:58,315 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 13:11:58,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741649641] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:58,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 13:11:58,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-22 13:11:58,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094613095] [2021-12-22 13:11:58,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:11:58,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:11:58,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:58,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:11:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:11:58,316 INFO L87 Difference]: Start difference. First operand 1079 states and 1506 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 13:11:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:11:58,466 INFO L93 Difference]: Finished difference Result 1135 states and 1574 transitions. [2021-12-22 13:11:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:11:58,467 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 13:11:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:11:58,473 INFO L225 Difference]: With dead ends: 1135 [2021-12-22 13:11:58,473 INFO L226 Difference]: Without dead ends: 1132 [2021-12-22 13:11:58,474 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 13:11:58,477 INFO L933 BasicCegarLoop]: 721 mSDtfsCounter, 1271 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:11:58,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1271 Valid, 788 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:11:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-12-22 13:11:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1078. [2021-12-22 13:11:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 963 states have (on average 1.3831775700934579) internal successors, (1332), 974 states have internal predecessors, (1332), 73 states have call successors, (73), 36 states have call predecessors, (73), 40 states have return successors, (98), 68 states have call predecessors, (98), 70 states have call successors, (98) [2021-12-22 13:11:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1503 transitions. [2021-12-22 13:11:58,536 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1503 transitions. Word has length 68 [2021-12-22 13:11:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:11:58,537 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1503 transitions. [2021-12-22 13:11:58,537 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 13:11:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1503 transitions. [2021-12-22 13:11:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 13:11:58,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:11:58,539 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 13:11:58,567 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 13:11:58,757 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 13:11:58,757 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:11:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:11:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1572679607, now seen corresponding path program 1 times [2021-12-22 13:11:58,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:11:58,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391747760] [2021-12-22 13:11:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:58,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:11:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:11:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:58,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:11:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:58,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 13:11:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:58,842 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 13:11:58,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:11:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391747760] [2021-12-22 13:11:58,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391747760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:11:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85601308] [2021-12-22 13:11:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:11:58,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:11:58,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:11:58,845 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 13:11:58,846 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 13:11:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:11:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:11:58,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:11:59,290 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 13:11:59,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:11:59,416 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 13:11:59,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85601308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:11:59,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:11:59,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-22 13:11:59,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496816711] [2021-12-22 13:11:59,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:11:59,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 13:11:59,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:11:59,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 13:11:59,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:11:59,419 INFO L87 Difference]: Start difference. First operand 1078 states and 1503 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 13:12:00,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:00,909 INFO L93 Difference]: Finished difference Result 2778 states and 3723 transitions. [2021-12-22 13:12:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 13:12:00,910 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 13:12:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:00,920 INFO L225 Difference]: With dead ends: 2778 [2021-12-22 13:12:00,920 INFO L226 Difference]: Without dead ends: 2234 [2021-12-22 13:12:00,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 13:12:00,924 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 1316 mSDsluCounter, 3185 mSDsCounter, 0 mSdLazyCounter, 1872 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 4011 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:00,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1349 Valid, 4011 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1872 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:12:00,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-12-22 13:12:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1467. [2021-12-22 13:12:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1313 states have (on average 1.345011424219345) internal successors, (1766), 1332 states have internal predecessors, (1766), 93 states have call successors, (93), 50 states have call predecessors, (93), 59 states have return successors, (132), 85 states have call predecessors, (132), 90 states have call successors, (132) [2021-12-22 13:12:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1991 transitions. [2021-12-22 13:12:01,029 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1991 transitions. Word has length 69 [2021-12-22 13:12:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:01,030 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 1991 transitions. [2021-12-22 13:12:01,030 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 13:12:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1991 transitions. [2021-12-22 13:12:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-22 13:12:01,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:01,034 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 13:12:01,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:01,259 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 13:12:01,259 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:01,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash 498798882, now seen corresponding path program 1 times [2021-12-22 13:12:01,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:01,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759463326] [2021-12-22 13:12:01,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:01,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:01,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-22 13:12:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-22 13:12:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 13:12:01,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:01,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759463326] [2021-12-22 13:12:01,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759463326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:01,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121550170] [2021-12-22 13:12:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:01,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:01,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:01,356 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 13:12:01,357 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 13:12:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 13:12:01,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-22 13:12:01,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:01,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121550170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:01,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:01,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:12:01,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377141234] [2021-12-22 13:12:01,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:01,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:01,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:01,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:01,590 INFO L87 Difference]: Start difference. First operand 1467 states and 1991 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 13:12:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:01,649 INFO L93 Difference]: Finished difference Result 2190 states and 2929 transitions. [2021-12-22 13:12:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-22 13:12:01,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:01,656 INFO L225 Difference]: With dead ends: 2190 [2021-12-22 13:12:01,656 INFO L226 Difference]: Without dead ends: 1345 [2021-12-22 13:12:01,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:01,659 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 656 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:01,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 802 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-12-22 13:12:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1330. [2021-12-22 13:12:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1192 states have (on average 1.348993288590604) internal successors, (1608), 1210 states have internal predecessors, (1608), 85 states have call successors, (85), 44 states have call predecessors, (85), 51 states have return successors, (118), 76 states have call predecessors, (118), 82 states have call successors, (118) [2021-12-22 13:12:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 1811 transitions. [2021-12-22 13:12:01,715 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 1811 transitions. Word has length 88 [2021-12-22 13:12:01,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:01,715 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 1811 transitions. [2021-12-22 13:12:01,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 13:12:01,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 1811 transitions. [2021-12-22 13:12:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 13:12:01,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:01,723 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 13:12:01,749 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 13:12:01,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:01,940 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1813831709, now seen corresponding path program 1 times [2021-12-22 13:12:01,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:01,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723467746] [2021-12-22 13:12:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:01,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:12:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:01,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 13:12:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 13:12:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-22 13:12:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:12:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 13:12:02,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:02,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723467746] [2021-12-22 13:12:02,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723467746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:12:02,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597053435] [2021-12-22 13:12:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:02,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:02,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:12:02,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:12:02,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:12:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 13:12:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:12:02,297 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 13:12:02,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:12:02,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597053435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:02,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:12:02,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-22 13:12:02,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034953933] [2021-12-22 13:12:02,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:02,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:12:02,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:12:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:02,299 INFO L87 Difference]: Start difference. First operand 1330 states and 1811 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 13:12:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:02,344 INFO L93 Difference]: Finished difference Result 1709 states and 2279 transitions. [2021-12-22 13:12:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:12:02,345 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 13:12:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:02,347 INFO L225 Difference]: With dead ends: 1709 [2021-12-22 13:12:02,347 INFO L226 Difference]: Without dead ends: 383 [2021-12-22 13:12:02,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:02,351 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 62 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1412 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 13:12:02,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1412 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:12:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-22 13:12:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-12-22 13:12:02,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5804597701149425) internal successors, (550), 350 states have internal predecessors, (550), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-22 13:12:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 604 transitions. [2021-12-22 13:12:02,364 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 604 transitions. Word has length 103 [2021-12-22 13:12:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:02,364 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 604 transitions. [2021-12-22 13:12:02,365 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 13:12:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 604 transitions. [2021-12-22 13:12:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:02,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:02,367 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:02,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:12:02,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:12:02,583 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash -659936082, now seen corresponding path program 1 times [2021-12-22 13:12:02,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:02,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643300625] [2021-12-22 13:12:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:02,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:02,726 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 13:12:02,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:02,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643300625] [2021-12-22 13:12:02,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643300625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:02,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:02,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:12:02,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103648388] [2021-12-22 13:12:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:02,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:12:02,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:12:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:12:02,729 INFO L87 Difference]: Start difference. First operand 383 states and 604 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 13:12:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:04,055 INFO L93 Difference]: Finished difference Result 901 states and 1444 transitions. [2021-12-22 13:12:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:12:04,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:04,059 INFO L225 Difference]: With dead ends: 901 [2021-12-22 13:12:04,059 INFO L226 Difference]: Without dead ends: 525 [2021-12-22 13:12:04,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:04,060 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1042 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:04,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 1085 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-22 13:12:04,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2021-12-22 13:12:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5775862068965518) internal successors, (549), 350 states have internal predecessors, (549), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-22 13:12:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 603 transitions. [2021-12-22 13:12:04,107 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 603 transitions. Word has length 179 [2021-12-22 13:12:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:04,107 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 603 transitions. [2021-12-22 13:12:04,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 13:12:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 603 transitions. [2021-12-22 13:12:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:04,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:04,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:04,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:12:04,110 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:04,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1308528852, now seen corresponding path program 1 times [2021-12-22 13:12:04,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:04,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049824685] [2021-12-22 13:12:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:04,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:04,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:04,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:04,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:04,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:04,241 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 13:12:04,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:04,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049824685] [2021-12-22 13:12:04,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049824685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:04,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:04,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:12:04,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461217550] [2021-12-22 13:12:04,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:04,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:12:04,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:04,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:12:04,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:12:04,244 INFO L87 Difference]: Start difference. First operand 383 states and 603 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 13:12:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:05,499 INFO L93 Difference]: Finished difference Result 893 states and 1427 transitions. [2021-12-22 13:12:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 13:12:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:05,503 INFO L225 Difference]: With dead ends: 893 [2021-12-22 13:12:05,503 INFO L226 Difference]: Without dead ends: 525 [2021-12-22 13:12:05,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:12:05,504 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 1033 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:05,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1083 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-22 13:12:05,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 383. [2021-12-22 13:12:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 348 states have (on average 1.5747126436781609) internal successors, (548), 350 states have internal predecessors, (548), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-22 13:12:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 602 transitions. [2021-12-22 13:12:05,529 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 602 transitions. Word has length 179 [2021-12-22 13:12:05,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:05,529 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 602 transitions. [2021-12-22 13:12:05,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 13:12:05,530 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 602 transitions. [2021-12-22 13:12:05,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:05,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:05,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:05,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:12:05,532 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:05,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:05,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1807085654, now seen corresponding path program 1 times [2021-12-22 13:12:05,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:05,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252966416] [2021-12-22 13:12:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:05,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:05,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:05,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:05,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:05,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:05,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:05,677 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 13:12:05,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:05,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252966416] [2021-12-22 13:12:05,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252966416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:05,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:05,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:12:05,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681741066] [2021-12-22 13:12:05,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:12:05,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:12:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:12:05,681 INFO L87 Difference]: Start difference. First operand 383 states and 602 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 13:12:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:08,252 INFO L93 Difference]: Finished difference Result 1409 states and 2265 transitions. [2021-12-22 13:12:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:12:08,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:08,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:08,257 INFO L225 Difference]: With dead ends: 1409 [2021-12-22 13:12:08,258 INFO L226 Difference]: Without dead ends: 1047 [2021-12-22 13:12:08,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:08,260 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 1564 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:08,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 1745 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 13:12:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-12-22 13:12:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 762. [2021-12-22 13:12:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 699 states have (on average 1.5879828326180256) internal successors, (1110), 702 states have internal predecessors, (1110), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (50), 47 states have call predecessors, (50), 47 states have call successors, (50) [2021-12-22 13:12:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1209 transitions. [2021-12-22 13:12:08,308 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1209 transitions. Word has length 179 [2021-12-22 13:12:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:08,309 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1209 transitions. [2021-12-22 13:12:08,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 13:12:08,309 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1209 transitions. [2021-12-22 13:12:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:08,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:08,311 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:08,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:12:08,311 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash -826130840, now seen corresponding path program 1 times [2021-12-22 13:12:08,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:08,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125916892] [2021-12-22 13:12:08,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:08,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:08,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:08,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:08,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:08,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:08,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:08,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:08,443 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 13:12:08,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:08,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125916892] [2021-12-22 13:12:08,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125916892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:08,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:08,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:08,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702926091] [2021-12-22 13:12:08,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:08,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:08,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:08,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:08,445 INFO L87 Difference]: Start difference. First operand 762 states and 1209 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:11,541 INFO L93 Difference]: Finished difference Result 2328 states and 3751 transitions. [2021-12-22 13:12:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:11,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:11,548 INFO L225 Difference]: With dead ends: 2328 [2021-12-22 13:12:11,548 INFO L226 Difference]: Without dead ends: 1587 [2021-12-22 13:12:11,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:11,550 INFO L933 BasicCegarLoop]: 1025 mSDtfsCounter, 1591 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:11,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 3012 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 13:12:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-12-22 13:12:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1114. [2021-12-22 13:12:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1023 states have (on average 1.5816226783968719) internal successors, (1618), 1027 states have internal predecessors, (1618), 70 states have call successors, (70), 19 states have call predecessors, (70), 20 states have return successors, (73), 69 states have call predecessors, (73), 68 states have call successors, (73) [2021-12-22 13:12:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1761 transitions. [2021-12-22 13:12:11,647 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1761 transitions. Word has length 179 [2021-12-22 13:12:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:11,648 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1761 transitions. [2021-12-22 13:12:11,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1761 transitions. [2021-12-22 13:12:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:11,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:11,650 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:11,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:12:11,650 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1699364842, now seen corresponding path program 1 times [2021-12-22 13:12:11,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:11,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312059280] [2021-12-22 13:12:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:11,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:11,798 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 13:12:11,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312059280] [2021-12-22 13:12:11,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312059280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:11,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:11,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:11,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353881439] [2021-12-22 13:12:11,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:11,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:11,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:11,800 INFO L87 Difference]: Start difference. First operand 1114 states and 1761 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:14,843 INFO L93 Difference]: Finished difference Result 3683 states and 5923 transitions. [2021-12-22 13:12:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:14,856 INFO L225 Difference]: With dead ends: 3683 [2021-12-22 13:12:14,857 INFO L226 Difference]: Without dead ends: 2590 [2021-12-22 13:12:14,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:14,860 INFO L933 BasicCegarLoop]: 1017 mSDtfsCounter, 1588 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3083 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1607 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 3083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:14,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1607 Valid, 3000 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 3083 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 13:12:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-12-22 13:12:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 1819. [2021-12-22 13:12:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.575956937799043) internal successors, (2635), 1678 states have internal predecessors, (2635), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-22 13:12:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2870 transitions. [2021-12-22 13:12:15,013 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2870 transitions. Word has length 179 [2021-12-22 13:12:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:15,014 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2870 transitions. [2021-12-22 13:12:15,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2870 transitions. [2021-12-22 13:12:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:15,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:15,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:15,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:12:15,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:15,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1088095784, now seen corresponding path program 1 times [2021-12-22 13:12:15,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:15,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071657361] [2021-12-22 13:12:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:15,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:15,164 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 13:12:15,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:15,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071657361] [2021-12-22 13:12:15,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071657361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:15,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:15,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:15,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500960513] [2021-12-22 13:12:15,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:15,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:15,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:15,167 INFO L87 Difference]: Start difference. First operand 1819 states and 2870 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:16,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:16,594 INFO L93 Difference]: Finished difference Result 4376 states and 7023 transitions. [2021-12-22 13:12:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:16,607 INFO L225 Difference]: With dead ends: 4376 [2021-12-22 13:12:16,607 INFO L226 Difference]: Without dead ends: 2578 [2021-12-22 13:12:16,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:16,613 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1295 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:16,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 1407 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-12-22 13:12:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1819. [2021-12-22 13:12:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.5729665071770336) internal successors, (2630), 1678 states have internal predecessors, (2630), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-22 13:12:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2865 transitions. [2021-12-22 13:12:16,779 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2865 transitions. Word has length 179 [2021-12-22 13:12:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:16,779 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2865 transitions. [2021-12-22 13:12:16,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2865 transitions. [2021-12-22 13:12:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:16,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:16,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:16,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:12:16,782 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:16,783 INFO L85 PathProgramCache]: Analyzing trace with hash -317095894, now seen corresponding path program 1 times [2021-12-22 13:12:16,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:16,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208317039] [2021-12-22 13:12:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:16,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:16,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:16,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:16,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:16,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:16,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:16,919 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 13:12:16,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208317039] [2021-12-22 13:12:16,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208317039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:16,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:16,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:16,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799362570] [2021-12-22 13:12:16,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:16,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:16,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:16,922 INFO L87 Difference]: Start difference. First operand 1819 states and 2865 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:18,353 INFO L93 Difference]: Finished difference Result 4370 states and 6997 transitions. [2021-12-22 13:12:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:18,363 INFO L225 Difference]: With dead ends: 4370 [2021-12-22 13:12:18,363 INFO L226 Difference]: Without dead ends: 2572 [2021-12-22 13:12:18,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:18,368 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 1296 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:18,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 1401 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:12:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-12-22 13:12:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 1819. [2021-12-22 13:12:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.569976076555024) internal successors, (2625), 1678 states have internal predecessors, (2625), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-22 13:12:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2860 transitions. [2021-12-22 13:12:18,548 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2860 transitions. Word has length 179 [2021-12-22 13:12:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:18,548 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2860 transitions. [2021-12-22 13:12:18,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2860 transitions. [2021-12-22 13:12:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:18,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:18,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:18,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:12:18,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:18,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1577237992, now seen corresponding path program 1 times [2021-12-22 13:12:18,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:18,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218822053] [2021-12-22 13:12:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:18,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:18,708 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 13:12:18,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218822053] [2021-12-22 13:12:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218822053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:18,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:18,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:18,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026298221] [2021-12-22 13:12:18,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:18,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:18,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:18,711 INFO L87 Difference]: Start difference. First operand 1819 states and 2860 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:20,232 INFO L93 Difference]: Finished difference Result 4358 states and 6959 transitions. [2021-12-22 13:12:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:20,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:20,241 INFO L225 Difference]: With dead ends: 4358 [2021-12-22 13:12:20,241 INFO L226 Difference]: Without dead ends: 2560 [2021-12-22 13:12:20,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:20,246 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 1125 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:20,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 1594 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:12:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-12-22 13:12:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 1819. [2021-12-22 13:12:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1672 states have (on average 1.5669856459330143) internal successors, (2620), 1678 states have internal predecessors, (2620), 112 states have call successors, (112), 31 states have call predecessors, (112), 34 states have return successors, (123), 113 states have call predecessors, (123), 110 states have call successors, (123) [2021-12-22 13:12:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 2855 transitions. [2021-12-22 13:12:20,425 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 2855 transitions. Word has length 179 [2021-12-22 13:12:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:20,426 INFO L470 AbstractCegarLoop]: Abstraction has 1819 states and 2855 transitions. [2021-12-22 13:12:20,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 2855 transitions. [2021-12-22 13:12:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:20,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:20,428 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:20,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:12:20,429 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash 654070566, now seen corresponding path program 1 times [2021-12-22 13:12:20,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:20,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650378819] [2021-12-22 13:12:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:20,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:20,593 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 13:12:20,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650378819] [2021-12-22 13:12:20,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650378819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:20,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:20,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:20,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210272009] [2021-12-22 13:12:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:20,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:20,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:20,596 INFO L87 Difference]: Start difference. First operand 1819 states and 2855 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:23,760 INFO L93 Difference]: Finished difference Result 6263 states and 9956 transitions. [2021-12-22 13:12:23,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:23,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:23,776 INFO L225 Difference]: With dead ends: 6263 [2021-12-22 13:12:23,776 INFO L226 Difference]: Without dead ends: 4465 [2021-12-22 13:12:23,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:23,781 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 1563 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:23,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 2972 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3005 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 13:12:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2021-12-22 13:12:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 3248. [2021-12-22 13:12:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2989 states have (on average 1.5617263298762127) internal successors, (4668), 2999 states have internal predecessors, (4668), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-22 13:12:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5093 transitions. [2021-12-22 13:12:24,045 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5093 transitions. Word has length 179 [2021-12-22 13:12:24,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:24,045 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 5093 transitions. [2021-12-22 13:12:24,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5093 transitions. [2021-12-22 13:12:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:24,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:24,049 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:24,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:12:24,049 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:24,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1039932968, now seen corresponding path program 1 times [2021-12-22 13:12:24,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:24,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554587845] [2021-12-22 13:12:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:24,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:24,189 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 13:12:24,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:24,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554587845] [2021-12-22 13:12:24,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554587845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:24,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:24,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:24,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826124141] [2021-12-22 13:12:24,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:24,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:24,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:24,205 INFO L87 Difference]: Start difference. First operand 3248 states and 5093 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:25,683 INFO L93 Difference]: Finished difference Result 7712 states and 12262 transitions. [2021-12-22 13:12:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:25,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:25,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:25,695 INFO L225 Difference]: With dead ends: 7712 [2021-12-22 13:12:25,695 INFO L226 Difference]: Without dead ends: 4485 [2021-12-22 13:12:25,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:25,702 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 1361 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:25,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 1351 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:12:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2021-12-22 13:12:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 3248. [2021-12-22 13:12:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 2989 states have (on average 1.5587152893944463) internal successors, (4659), 2999 states have internal predecessors, (4659), 196 states have call successors, (196), 55 states have call predecessors, (196), 62 states have return successors, (229), 201 states have call predecessors, (229), 194 states have call successors, (229) [2021-12-22 13:12:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 5084 transitions. [2021-12-22 13:12:26,057 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 5084 transitions. Word has length 179 [2021-12-22 13:12:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:26,057 INFO L470 AbstractCegarLoop]: Abstraction has 3248 states and 5084 transitions. [2021-12-22 13:12:26,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 5084 transitions. [2021-12-22 13:12:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:26,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:26,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:26,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:12:26,061 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:26,061 INFO L85 PathProgramCache]: Analyzing trace with hash 775285478, now seen corresponding path program 1 times [2021-12-22 13:12:26,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:26,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085339305] [2021-12-22 13:12:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:26,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:26,204 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 13:12:26,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:26,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085339305] [2021-12-22 13:12:26,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085339305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:26,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:26,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:26,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263584569] [2021-12-22 13:12:26,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:26,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:26,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:26,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:26,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:26,206 INFO L87 Difference]: Start difference. First operand 3248 states and 5084 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:29,658 INFO L93 Difference]: Finished difference Result 11464 states and 18144 transitions. [2021-12-22 13:12:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:29,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:29,686 INFO L225 Difference]: With dead ends: 11464 [2021-12-22 13:12:29,686 INFO L226 Difference]: Without dead ends: 8237 [2021-12-22 13:12:29,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:29,694 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 1555 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 2978 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 3064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:29,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 2961 Invalid, 3064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2978 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 13:12:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8237 states. [2021-12-22 13:12:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8237 to 6114. [2021-12-22 13:12:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.554075652637187) internal successors, (8751), 5649 states have internal predecessors, (8751), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-22 13:12:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9574 transitions. [2021-12-22 13:12:30,343 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9574 transitions. Word has length 179 [2021-12-22 13:12:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:30,343 INFO L470 AbstractCegarLoop]: Abstraction has 6114 states and 9574 transitions. [2021-12-22 13:12:30,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9574 transitions. [2021-12-22 13:12:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:30,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:30,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:30,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:12:30,347 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1588556184, now seen corresponding path program 1 times [2021-12-22 13:12:30,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:30,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372140841] [2021-12-22 13:12:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:30,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:30,504 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 13:12:30,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:30,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372140841] [2021-12-22 13:12:30,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372140841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:30,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:30,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:30,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657093949] [2021-12-22 13:12:30,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:30,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:30,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:30,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:30,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:30,506 INFO L87 Difference]: Start difference. First operand 6114 states and 9574 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:32,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:32,642 INFO L93 Difference]: Finished difference Result 14408 states and 22861 transitions. [2021-12-22 13:12:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:32,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:32,663 INFO L225 Difference]: With dead ends: 14408 [2021-12-22 13:12:32,663 INFO L226 Difference]: Without dead ends: 8315 [2021-12-22 13:12:32,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:32,676 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 1123 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:32,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1143 Valid, 1580 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:12:32,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2021-12-22 13:12:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 6114. [2021-12-22 13:12:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.5510566506837151) internal successors, (8734), 5649 states have internal predecessors, (8734), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-22 13:12:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9557 transitions. [2021-12-22 13:12:33,263 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9557 transitions. Word has length 179 [2021-12-22 13:12:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:33,263 INFO L470 AbstractCegarLoop]: Abstraction has 6114 states and 9557 transitions. [2021-12-22 13:12:33,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9557 transitions. [2021-12-22 13:12:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:33,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:33,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:33,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:12:33,268 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:33,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1383232166, now seen corresponding path program 1 times [2021-12-22 13:12:33,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:33,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187785422] [2021-12-22 13:12:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:33,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:33,387 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 13:12:33,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:33,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187785422] [2021-12-22 13:12:33,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187785422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:33,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:33,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:33,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389604614] [2021-12-22 13:12:33,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:33,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:33,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:33,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:33,389 INFO L87 Difference]: Start difference. First operand 6114 states and 9557 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:35,795 INFO L93 Difference]: Finished difference Result 14390 states and 22774 transitions. [2021-12-22 13:12:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:12:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:35,821 INFO L225 Difference]: With dead ends: 14390 [2021-12-22 13:12:35,822 INFO L226 Difference]: Without dead ends: 8297 [2021-12-22 13:12:35,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:12:35,838 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 1121 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:35,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 1576 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 13:12:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2021-12-22 13:12:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 6114. [2021-12-22 13:12:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6114 states, 5631 states have (on average 1.5480376487302432) internal successors, (8717), 5649 states have internal predecessors, (8717), 364 states have call successors, (364), 103 states have call predecessors, (364), 118 states have return successors, (459), 377 states have call predecessors, (459), 362 states have call successors, (459) [2021-12-22 13:12:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6114 states to 6114 states and 9540 transitions. [2021-12-22 13:12:36,491 INFO L78 Accepts]: Start accepts. Automaton has 6114 states and 9540 transitions. Word has length 179 [2021-12-22 13:12:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:36,491 INFO L470 AbstractCegarLoop]: Abstraction has 6114 states and 9540 transitions. [2021-12-22 13:12:36,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:36,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6114 states and 9540 transitions. [2021-12-22 13:12:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:36,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:36,496 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:36,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:12:36,496 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:36,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1014755672, now seen corresponding path program 1 times [2021-12-22 13:12:36,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:36,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480726872] [2021-12-22 13:12:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:36,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:36,632 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 13:12:36,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:36,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480726872] [2021-12-22 13:12:36,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480726872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:36,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:36,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:36,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466704385] [2021-12-22 13:12:36,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:36,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:36,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:36,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:36,634 INFO L87 Difference]: Start difference. First operand 6114 states and 9540 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:12:41,121 INFO L93 Difference]: Finished difference Result 21844 states and 34408 transitions. [2021-12-22 13:12:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:12:41,121 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:12:41,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:12:41,166 INFO L225 Difference]: With dead ends: 21844 [2021-12-22 13:12:41,166 INFO L226 Difference]: Without dead ends: 15751 [2021-12-22 13:12:41,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:12:41,184 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 1543 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 2929 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 2942 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:12:41,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1562 Valid, 2942 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2929 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 13:12:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15751 states. [2021-12-22 13:12:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15751 to 11893. [2021-12-22 13:12:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11893 states, 10962 states have (on average 1.5437876299945266) internal successors, (16923), 10996 states have internal predecessors, (16923), 700 states have call successors, (700), 199 states have call predecessors, (700), 230 states have return successors, (973), 729 states have call predecessors, (973), 698 states have call successors, (973) [2021-12-22 13:12:42,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11893 states to 11893 states and 18596 transitions. [2021-12-22 13:12:42,426 INFO L78 Accepts]: Start accepts. Automaton has 11893 states and 18596 transitions. Word has length 179 [2021-12-22 13:12:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:12:42,426 INFO L470 AbstractCegarLoop]: Abstraction has 11893 states and 18596 transitions. [2021-12-22 13:12:42,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 13:12:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 11893 states and 18596 transitions. [2021-12-22 13:12:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:12:42,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:12:42,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:12:42,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:12:42,433 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:12:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:12:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -676468122, now seen corresponding path program 1 times [2021-12-22 13:12:42,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:12:42,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933952067] [2021-12-22 13:12:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:12:42,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:12:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:12:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:12:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:12:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:12:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:12:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:12:42,577 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 13:12:42,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:12:42,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933952067] [2021-12-22 13:12:42,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933952067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:12:42,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:12:42,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:12:42,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096456581] [2021-12-22 13:12:42,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:12:42,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:12:42,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:12:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:12:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:12:42,580 INFO L87 Difference]: Start difference. First operand 11893 states and 18596 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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)