./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2018/Problem13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/eca-rers2018/Problem13.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 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 05:29:00,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 05:29:00,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 05:29:01,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 05:29:01,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 05:29:01,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 05:29:01,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 05:29:01,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 05:29:01,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 05:29:01,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 05:29:01,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 05:29:01,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 05:29:01,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 05:29:01,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 05:29:01,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 05:29:01,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 05:29:01,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 05:29:01,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 05:29:01,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 05:29:01,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 05:29:01,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 05:29:01,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 05:29:01,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 05:29:01,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 05:29:01,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 05:29:01,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 05:29:01,073 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 05:29:01,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 05:29:01,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 05:29:01,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 05:29:01,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 05:29:01,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 05:29:01,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 05:29:01,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 05:29:01,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 05:29:01,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 05:29:01,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 05:29:01,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 05:29:01,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 05:29:01,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 05:29:01,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 05:29:01,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 05:29:01,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 05:29:01,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 05:29:01,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 05:29:01,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 05:29:01,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 05:29:01,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 05:29:01,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 05:29:01,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 05:29:01,099 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 05:29:01,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 05:29:01,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 05:29:01,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 05:29:01,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 05:29:01,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 05:29:01,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 05:29:01,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 05:29:01,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 05:29:01,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 05:29:01,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 05:29:01,102 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 05:29:01,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 05:29:01,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 05:29:01,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 05:29:01,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 05:29:01,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:29:01,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 05:29:01,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 05:29:01,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 05:29:01,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 05:29:01,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 05:29:01,104 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 05:29:01,104 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 05:29:01,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 05:29:01,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 05:29:01,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39257b2f2790dc593eb015569e826a332fcc3e3cd918d00daa305f748c1b3d75 [2021-12-17 05:29:01,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 05:29:01,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 05:29:01,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 05:29:01,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 05:29:01,319 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 05:29:01,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2018/Problem13.c [2021-12-17 05:29:01,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef5f8ae74/671869b426644755a23c38911f8c8a1c/FLAG96754f1a6 [2021-12-17 05:29:02,537 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 05:29:02,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem13.c [2021-12-17 05:29:02,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef5f8ae74/671869b426644755a23c38911f8c8a1c/FLAG96754f1a6 [2021-12-17 05:29:02,892 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef5f8ae74/671869b426644755a23c38911f8c8a1c [2021-12-17 05:29:02,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 05:29:02,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 05:29:02,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 05:29:02,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 05:29:02,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 05:29:02,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:29:02" (1/1) ... [2021-12-17 05:29:02,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41910498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:02, skipping insertion in model container [2021-12-17 05:29:02,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:29:02" (1/1) ... [2021-12-17 05:29:02,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 05:29:03,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 05:29:03,599 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/eca-rers2018/Problem13.c[778,791] [2021-12-17 05:29:03,621 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/eca-rers2018/Problem13.c[817,830] [2021-12-17 05:29:16,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:29:16,948 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 05:29:16,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem13.c[778,791] [2021-12-17 05:29:16,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2018/Problem13.c[817,830] [2021-12-17 05:29:18,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:29:18,780 INFO L208 MainTranslator]: Completed translation [2021-12-17 05:29:18,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18 WrapperNode [2021-12-17 05:29:18,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 05:29:18,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 05:29:18,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 05:29:18,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 05:29:18,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:19,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:20,268 INFO L137 Inliner]: procedures = 710, calls = 701, calls flagged for inlining = 597, calls inlined = 597, statements flattened = 108769 [2021-12-17 05:29:20,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 05:29:20,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 05:29:20,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 05:29:20,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 05:29:20,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:20,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:20,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:20,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:20,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:21,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:21,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:21,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 05:29:21,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 05:29:21,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 05:29:21,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 05:29:21,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (1/1) ... [2021-12-17 05:29:21,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:29:21,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:29:21,480 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) [2021-12-17 05:29:21,486 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 [2021-12-17 05:29:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 05:29:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 05:29:21,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 05:29:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2021-12-17 05:29:21,508 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2021-12-17 05:29:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2021-12-17 05:29:21,511 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2021-12-17 05:29:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 05:29:21,813 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 05:29:21,814 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 05:29:33,840 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 05:29:33,874 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 05:29:33,875 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 05:29:33,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:29:33 BoogieIcfgContainer [2021-12-17 05:29:33,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 05:29:33,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 05:29:33,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 05:29:33,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 05:29:33,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:29:02" (1/3) ... [2021-12-17 05:29:33,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f1537b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:29:33, skipping insertion in model container [2021-12-17 05:29:33,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:29:18" (2/3) ... [2021-12-17 05:29:33,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f1537b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:29:33, skipping insertion in model container [2021-12-17 05:29:33,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:29:33" (3/3) ... [2021-12-17 05:29:33,888 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13.c [2021-12-17 05:29:33,891 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 05:29:33,891 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 05:29:33,939 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 05:29:33,943 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 [2021-12-17 05:29:33,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 05:29:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-17 05:29:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 05:29:34,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:29:34,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:29:34,002 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:29:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:29:34,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1914797321, now seen corresponding path program 1 times [2021-12-17 05:29:34,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:29:34,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957604530] [2021-12-17 05:29:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:29:34,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:29:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:29:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:29:34,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:29:34,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957604530] [2021-12-17 05:29:34,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957604530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:29:34,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:29:34,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:29:34,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49985144] [2021-12-17 05:29:34,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:29:34,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:29:34,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:29:34,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:29:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:29:34,333 INFO L87 Difference]: Start difference. First operand has 3533 states, 3428 states have (on average 1.8246791131855309) internal successors, (6255), 3430 states have internal predecessors, (6255), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:29:41,578 INFO L93 Difference]: Finished difference Result 9556 states and 17573 transitions. [2021-12-17 05:29:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:29:41,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 05:29:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:29:41,622 INFO L225 Difference]: With dead ends: 9556 [2021-12-17 05:29:41,622 INFO L226 Difference]: Without dead ends: 6016 [2021-12-17 05:29:41,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:29:41,635 INFO L933 BasicCegarLoop]: 6282 mSDtfsCounter, 4696 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 7368 mSolverCounterSat, 821 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4696 SdHoareTripleChecker+Valid, 9603 SdHoareTripleChecker+Invalid, 8189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 821 IncrementalHoareTripleChecker+Valid, 7368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:29:41,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4696 Valid, 9603 Invalid, 8189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [821 Valid, 7368 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-12-17 05:29:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6016 states. [2021-12-17 05:29:41,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6016 to 5245. [2021-12-17 05:29:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5245 states, 5143 states have (on average 1.7841726618705036) internal successors, (9176), 5242 states have internal predecessors, (9176), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5245 states to 5245 states and 9276 transitions. [2021-12-17 05:29:41,794 INFO L78 Accepts]: Start accepts. Automaton has 5245 states and 9276 transitions. Word has length 13 [2021-12-17 05:29:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:29:41,794 INFO L470 AbstractCegarLoop]: Abstraction has 5245 states and 9276 transitions. [2021-12-17 05:29:41,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5245 states and 9276 transitions. [2021-12-17 05:29:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 05:29:41,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:29:41,798 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] [2021-12-17 05:29:41,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 05:29:41,799 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:29:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:29:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash -873779178, now seen corresponding path program 1 times [2021-12-17 05:29:41,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:29:41,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847545684] [2021-12-17 05:29:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:29:41,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:29:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:29:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:29:41,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:29:41,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847545684] [2021-12-17 05:29:41,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847545684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:29:41,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:29:41,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:29:41,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307272804] [2021-12-17 05:29:41,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:29:41,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:29:41,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:29:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:29:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:29:41,894 INFO L87 Difference]: Start difference. First operand 5245 states and 9276 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:29:46,455 INFO L93 Difference]: Finished difference Result 11853 states and 20876 transitions. [2021-12-17 05:29:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:29:46,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 05:29:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:29:46,473 INFO L225 Difference]: With dead ends: 11853 [2021-12-17 05:29:46,473 INFO L226 Difference]: Without dead ends: 6610 [2021-12-17 05:29:46,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:29:46,478 INFO L933 BasicCegarLoop]: 6516 mSDtfsCounter, 1904 mSDsluCounter, 3296 mSDsCounter, 0 mSdLazyCounter, 4502 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1904 SdHoareTripleChecker+Valid, 9812 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 4502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:29:46,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1904 Valid, 9812 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 4502 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 05:29:46,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2021-12-17 05:29:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6115. [2021-12-17 05:29:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6115 states, 6013 states have (on average 1.7490437385664395) internal successors, (10517), 6112 states have internal predecessors, (10517), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6115 states to 6115 states and 10617 transitions. [2021-12-17 05:29:46,566 INFO L78 Accepts]: Start accepts. Automaton has 6115 states and 10617 transitions. Word has length 22 [2021-12-17 05:29:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:29:46,566 INFO L470 AbstractCegarLoop]: Abstraction has 6115 states and 10617 transitions. [2021-12-17 05:29:46,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6115 states and 10617 transitions. [2021-12-17 05:29:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 05:29:46,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:29:46,568 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] [2021-12-17 05:29:46,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 05:29:46,568 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:29:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:29:46,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2028786272, now seen corresponding path program 1 times [2021-12-17 05:29:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:29:46,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075392950] [2021-12-17 05:29:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:29:46,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:29:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:29:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:29:46,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:29:46,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075392950] [2021-12-17 05:29:46,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075392950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:29:46,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:29:46,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:29:46,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127762483] [2021-12-17 05:29:46,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:29:46,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:29:46,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:29:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:29:46,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:46,638 INFO L87 Difference]: Start difference. First operand 6115 states and 10617 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:46,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:29:46,869 INFO L93 Difference]: Finished difference Result 17808 states and 30942 transitions. [2021-12-17 05:29:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:29:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-17 05:29:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:29:46,913 INFO L225 Difference]: With dead ends: 17808 [2021-12-17 05:29:46,914 INFO L226 Difference]: Without dead ends: 11695 [2021-12-17 05:29:46,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:46,928 INFO L933 BasicCegarLoop]: 6287 mSDtfsCounter, 6151 mSDsluCounter, 6031 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6151 SdHoareTripleChecker+Valid, 12318 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:29:46,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6151 Valid, 12318 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 05:29:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11695 states. [2021-12-17 05:29:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11695 to 11596. [2021-12-17 05:29:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11596 states, 11494 states have (on average 1.7502175047851052) internal successors, (20117), 11593 states have internal predecessors, (20117), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11596 states to 11596 states and 20217 transitions. [2021-12-17 05:29:47,116 INFO L78 Accepts]: Start accepts. Automaton has 11596 states and 20217 transitions. Word has length 32 [2021-12-17 05:29:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:29:47,117 INFO L470 AbstractCegarLoop]: Abstraction has 11596 states and 20217 transitions. [2021-12-17 05:29:47,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 11596 states and 20217 transitions. [2021-12-17 05:29:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-17 05:29:47,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:29:47,118 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] [2021-12-17 05:29:47,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 05:29:47,119 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:29:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:29:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash 342220768, now seen corresponding path program 1 times [2021-12-17 05:29:47,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:29:47,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255685790] [2021-12-17 05:29:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:29:47,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:29:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:29:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:29:47,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:29:47,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255685790] [2021-12-17 05:29:47,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255685790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:29:47,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:29:47,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:29:47,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732383169] [2021-12-17 05:29:47,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:29:47,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:29:47,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:29:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:29:47,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:47,166 INFO L87 Difference]: Start difference. First operand 11596 states and 20217 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:29:47,407 INFO L93 Difference]: Finished difference Result 34504 states and 60181 transitions. [2021-12-17 05:29:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:29:47,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-17 05:29:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:29:47,445 INFO L225 Difference]: With dead ends: 34504 [2021-12-17 05:29:47,445 INFO L226 Difference]: Without dead ends: 22910 [2021-12-17 05:29:47,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:47,468 INFO L933 BasicCegarLoop]: 6315 mSDtfsCounter, 6076 mSDsluCounter, 6151 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6076 SdHoareTripleChecker+Valid, 12466 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 05:29:47,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6076 Valid, 12466 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 05:29:47,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22910 states. [2021-12-17 05:29:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22910 to 22809. [2021-12-17 05:29:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22809 states, 22707 states have (on average 1.7501651473114017) internal successors, (39741), 22806 states have internal predecessors, (39741), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22809 states to 22809 states and 39841 transitions. [2021-12-17 05:29:47,763 INFO L78 Accepts]: Start accepts. Automaton has 22809 states and 39841 transitions. Word has length 32 [2021-12-17 05:29:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:29:47,764 INFO L470 AbstractCegarLoop]: Abstraction has 22809 states and 39841 transitions. [2021-12-17 05:29:47,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 22809 states and 39841 transitions. [2021-12-17 05:29:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 05:29:47,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:29:47,767 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] [2021-12-17 05:29:47,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 05:29:47,768 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:29:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:29:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2018208297, now seen corresponding path program 1 times [2021-12-17 05:29:47,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:29:47,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135640415] [2021-12-17 05:29:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:29:47,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:29:47,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:29:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:29:47,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:29:47,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135640415] [2021-12-17 05:29:47,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135640415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:29:47,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:29:47,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:29:47,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048113668] [2021-12-17 05:29:47,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:29:47,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:29:47,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:29:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:29:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:47,851 INFO L87 Difference]: Start difference. First operand 22809 states and 39841 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:29:48,126 INFO L93 Difference]: Finished difference Result 67983 states and 118693 transitions. [2021-12-17 05:29:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:29:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-17 05:29:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:29:48,203 INFO L225 Difference]: With dead ends: 67983 [2021-12-17 05:29:48,204 INFO L226 Difference]: Without dead ends: 45176 [2021-12-17 05:29:48,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:48,240 INFO L933 BasicCegarLoop]: 6306 mSDtfsCounter, 6132 mSDsluCounter, 6148 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6132 SdHoareTripleChecker+Valid, 12454 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:29:48,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6132 Valid, 12454 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 05:29:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45176 states. [2021-12-17 05:29:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45176 to 45074. [2021-12-17 05:29:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45074 states, 44972 states have (on average 1.748332295650627) internal successors, (78626), 45071 states have internal predecessors, (78626), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45074 states to 45074 states and 78726 transitions. [2021-12-17 05:29:48,882 INFO L78 Accepts]: Start accepts. Automaton has 45074 states and 78726 transitions. Word has length 33 [2021-12-17 05:29:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:29:48,882 INFO L470 AbstractCegarLoop]: Abstraction has 45074 states and 78726 transitions. [2021-12-17 05:29:48,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 45074 states and 78726 transitions. [2021-12-17 05:29:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 05:29:48,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:29:48,884 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] [2021-12-17 05:29:48,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 05:29:48,884 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:29:48,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:29:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1860746363, now seen corresponding path program 1 times [2021-12-17 05:29:48,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:29:48,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653083035] [2021-12-17 05:29:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:29:48,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:29:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:29:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:29:48,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:29:48,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653083035] [2021-12-17 05:29:48,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653083035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:29:48,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:29:48,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:29:48,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96834062] [2021-12-17 05:29:48,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:29:48,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:29:48,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:29:48,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:29:48,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:48,940 INFO L87 Difference]: Start difference. First operand 45074 states and 78726 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:29:52,335 INFO L93 Difference]: Finished difference Result 119282 states and 210384 transitions. [2021-12-17 05:29:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:29:52,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-17 05:29:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:29:52,469 INFO L225 Difference]: With dead ends: 119282 [2021-12-17 05:29:52,469 INFO L226 Difference]: Without dead ends: 74210 [2021-12-17 05:29:52,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:52,519 INFO L933 BasicCegarLoop]: 7496 mSDtfsCounter, 4604 mSDsluCounter, 4345 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4604 SdHoareTripleChecker+Valid, 11841 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2122 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:29:52,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4604 Valid, 11841 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2122 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 05:29:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74210 states. [2021-12-17 05:29:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74210 to 72380. [2021-12-17 05:29:53,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72380 states, 72278 states have (on average 1.7643266277428817) internal successors, (127522), 72377 states have internal predecessors, (127522), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72380 states to 72380 states and 127622 transitions. [2021-12-17 05:29:53,444 INFO L78 Accepts]: Start accepts. Automaton has 72380 states and 127622 transitions. Word has length 34 [2021-12-17 05:29:53,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:29:53,445 INFO L470 AbstractCegarLoop]: Abstraction has 72380 states and 127622 transitions. [2021-12-17 05:29:53,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand 72380 states and 127622 transitions. [2021-12-17 05:29:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 05:29:53,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:29:53,448 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] [2021-12-17 05:29:53,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 05:29:53,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:29:53,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:29:53,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1849249746, now seen corresponding path program 1 times [2021-12-17 05:29:53,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:29:53,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206396106] [2021-12-17 05:29:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:29:53,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:29:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:29:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:29:53,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:29:53,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206396106] [2021-12-17 05:29:53,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206396106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:29:53,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:29:53,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:29:53,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230768078] [2021-12-17 05:29:53,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:29:53,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:29:53,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:29:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:29:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:53,506 INFO L87 Difference]: Start difference. First operand 72380 states and 127622 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:29:57,078 INFO L93 Difference]: Finished difference Result 173282 states and 306742 transitions. [2021-12-17 05:29:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:29:57,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 05:29:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:29:57,279 INFO L225 Difference]: With dead ends: 173282 [2021-12-17 05:29:57,280 INFO L226 Difference]: Without dead ends: 100904 [2021-12-17 05:29:57,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:29:57,334 INFO L933 BasicCegarLoop]: 9938 mSDtfsCounter, 4494 mSDsluCounter, 4418 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 883 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4494 SdHoareTripleChecker+Valid, 14356 SdHoareTripleChecker+Invalid, 2745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:29:57,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4494 Valid, 14356 Invalid, 2745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [883 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 05:29:57,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100904 states. [2021-12-17 05:29:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100904 to 97592. [2021-12-17 05:29:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97592 states, 97490 states have (on average 1.7635962662837215) internal successors, (171933), 97589 states have internal predecessors, (171933), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97592 states to 97592 states and 172033 transitions. [2021-12-17 05:29:58,757 INFO L78 Accepts]: Start accepts. Automaton has 97592 states and 172033 transitions. Word has length 35 [2021-12-17 05:29:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:29:58,757 INFO L470 AbstractCegarLoop]: Abstraction has 97592 states and 172033 transitions. [2021-12-17 05:29:58,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:29:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 97592 states and 172033 transitions. [2021-12-17 05:29:58,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 05:29:58,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:29:58,758 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] [2021-12-17 05:29:58,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 05:29:58,759 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:29:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:29:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash 900277528, now seen corresponding path program 1 times [2021-12-17 05:29:58,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:29:58,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264168915] [2021-12-17 05:29:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:29:58,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:29:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:29:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:29:58,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:29:58,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264168915] [2021-12-17 05:29:58,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264168915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:29:58,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:29:58,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:29:58,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738617844] [2021-12-17 05:29:58,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:29:58,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:29:58,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:29:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:29:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:29:58,854 INFO L87 Difference]: Start difference. First operand 97592 states and 172033 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:30:08,516 INFO L93 Difference]: Finished difference Result 222424 states and 391054 transitions. [2021-12-17 05:30:08,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:30:08,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-17 05:30:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:30:08,730 INFO L225 Difference]: With dead ends: 222424 [2021-12-17 05:30:08,731 INFO L226 Difference]: Without dead ends: 124834 [2021-12-17 05:30:08,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:30:08,792 INFO L933 BasicCegarLoop]: 7256 mSDtfsCounter, 2745 mSDsluCounter, 4467 mSDsCounter, 0 mSdLazyCounter, 12743 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 11723 SdHoareTripleChecker+Invalid, 13334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 12743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:30:08,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 11723 Invalid, 13334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 12743 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2021-12-17 05:30:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124834 states. [2021-12-17 05:30:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124834 to 116527. [2021-12-17 05:30:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116527 states, 116425 states have (on average 1.7467640111659868) internal successors, (203367), 116524 states have internal predecessors, (203367), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116527 states to 116527 states and 203467 transitions. [2021-12-17 05:30:10,562 INFO L78 Accepts]: Start accepts. Automaton has 116527 states and 203467 transitions. Word has length 36 [2021-12-17 05:30:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:30:10,567 INFO L470 AbstractCegarLoop]: Abstraction has 116527 states and 203467 transitions. [2021-12-17 05:30:10,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:10,571 INFO L276 IsEmpty]: Start isEmpty. Operand 116527 states and 203467 transitions. [2021-12-17 05:30:10,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 05:30:10,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:30:10,573 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] [2021-12-17 05:30:10,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 05:30:10,575 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:30:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:30:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash -620431340, now seen corresponding path program 1 times [2021-12-17 05:30:10,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:30:10,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972978320] [2021-12-17 05:30:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:30:10,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:30:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:30:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:30:10,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:30:10,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972978320] [2021-12-17 05:30:10,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972978320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:30:10,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:30:10,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:30:10,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489029660] [2021-12-17 05:30:10,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:30:10,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:30:10,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:30:10,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:30:10,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:30:10,679 INFO L87 Difference]: Start difference. First operand 116527 states and 203467 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:30:20,459 INFO L93 Difference]: Finished difference Result 309382 states and 537203 transitions. [2021-12-17 05:30:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:30:20,459 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-17 05:30:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:30:20,765 INFO L225 Difference]: With dead ends: 309382 [2021-12-17 05:30:20,765 INFO L226 Difference]: Without dead ends: 192857 [2021-12-17 05:30:20,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:30:20,848 INFO L933 BasicCegarLoop]: 7308 mSDtfsCounter, 2745 mSDsluCounter, 4611 mSDsCounter, 0 mSdLazyCounter, 12438 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2745 SdHoareTripleChecker+Valid, 11919 SdHoareTripleChecker+Invalid, 12970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 12438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:30:20,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2745 Valid, 11919 Invalid, 12970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 12438 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2021-12-17 05:30:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192857 states. [2021-12-17 05:30:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192857 to 168996. [2021-12-17 05:30:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168996 states, 168894 states have (on average 1.728137174796026) internal successors, (291872), 168993 states have internal predecessors, (291872), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168996 states to 168996 states and 291972 transitions. [2021-12-17 05:30:23,328 INFO L78 Accepts]: Start accepts. Automaton has 168996 states and 291972 transitions. Word has length 40 [2021-12-17 05:30:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:30:23,328 INFO L470 AbstractCegarLoop]: Abstraction has 168996 states and 291972 transitions. [2021-12-17 05:30:23,328 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 168996 states and 291972 transitions. [2021-12-17 05:30:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 05:30:23,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:30:23,330 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] [2021-12-17 05:30:23,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 05:30:23,330 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:30:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:30:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1470901934, now seen corresponding path program 1 times [2021-12-17 05:30:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:30:23,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184923715] [2021-12-17 05:30:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:30:23,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:30:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:30:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:30:23,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:30:23,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184923715] [2021-12-17 05:30:23,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184923715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:30:23,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:30:23,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:30:23,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808179450] [2021-12-17 05:30:23,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:30:23,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:30:23,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:30:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:30:23,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:30:23,378 INFO L87 Difference]: Start difference. First operand 168996 states and 291972 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:30:27,286 INFO L93 Difference]: Finished difference Result 477674 states and 824573 transitions. [2021-12-17 05:30:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:30:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-17 05:30:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:30:27,856 INFO L225 Difference]: With dead ends: 477674 [2021-12-17 05:30:27,856 INFO L226 Difference]: Without dead ends: 308680 [2021-12-17 05:30:27,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:30:27,973 INFO L933 BasicCegarLoop]: 9922 mSDtfsCounter, 5090 mSDsluCounter, 4767 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5090 SdHoareTripleChecker+Valid, 14689 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 801 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:30:27,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5090 Valid, 14689 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [801 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 05:30:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308680 states. [2021-12-17 05:30:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308680 to 305453. [2021-12-17 05:30:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305453 states, 305351 states have (on average 1.72039063241974) internal successors, (525323), 305450 states have internal predecessors, (525323), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305453 states to 305453 states and 525423 transitions. [2021-12-17 05:30:32,214 INFO L78 Accepts]: Start accepts. Automaton has 305453 states and 525423 transitions. Word has length 40 [2021-12-17 05:30:32,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:30:32,214 INFO L470 AbstractCegarLoop]: Abstraction has 305453 states and 525423 transitions. [2021-12-17 05:30:32,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 305453 states and 525423 transitions. [2021-12-17 05:30:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 05:30:32,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:30:32,215 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] [2021-12-17 05:30:32,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 05:30:32,216 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:30:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:30:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1687857598, now seen corresponding path program 1 times [2021-12-17 05:30:32,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:30:32,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57924948] [2021-12-17 05:30:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:30:32,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:30:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:30:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:30:32,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:30:32,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57924948] [2021-12-17 05:30:32,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57924948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:30:32,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:30:32,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:30:32,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406563421] [2021-12-17 05:30:32,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:30:32,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:30:32,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:30:32,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:30:32,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:30:32,275 INFO L87 Difference]: Start difference. First operand 305453 states and 525423 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:30:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:30:36,519 INFO L93 Difference]: Finished difference Result 909387 states and 1564129 transitions. [2021-12-17 05:30:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:30:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-17 05:30:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted.