./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/product-lines/email_spec0_product05.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74a12e124f66b10df64ef68155d31c3be83012aab827a45870f5335a6569b75a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:41:45,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:41:45,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:41:45,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:41:45,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:41:45,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:41:45,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:41:45,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:41:45,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:41:45,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:41:45,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:41:45,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:41:45,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:41:45,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:41:45,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:41:45,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:41:45,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:41:45,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:41:45,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:41:45,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:41:45,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:41:45,103 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:41:45,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:41:45,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:41:45,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:41:45,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:41:45,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:41:45,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:41:45,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:41:45,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:41:45,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:41:45,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:41:45,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:41:45,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:41:45,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:41:45,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:41:45,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:41:45,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:41:45,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:41:45,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:41:45,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:41:45,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:41:45,141 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:41:45,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:41:45,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:41:45,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:41:45,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:41:45,144 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:41:45,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:41:45,145 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:41:45,145 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:41:45,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:41:45,146 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:41:45,146 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:41:45,146 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:41:45,146 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:41:45,146 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:41:45,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:41:45,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:41:45,147 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:41:45,147 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:41:45,147 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:41:45,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:41:45,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:41:45,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:41:45,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:41:45,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:41:45,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:41:45,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:41:45,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:41:45,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:41:45,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:41:45,149 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:41:45,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:41:45,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:41:45,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74a12e124f66b10df64ef68155d31c3be83012aab827a45870f5335a6569b75a [2021-12-28 00:41:45,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:41:45,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:41:45,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:41:45,440 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:41:45,441 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:41:45,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2021-12-28 00:41:45,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/495e4240a/b48ef0778f334ee1a07edbabbe7dfdee/FLAGf471f4a7e [2021-12-28 00:41:45,905 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:41:45,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/email_spec0_product05.cil.c [2021-12-28 00:41:45,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/495e4240a/b48ef0778f334ee1a07edbabbe7dfdee/FLAGf471f4a7e [2021-12-28 00:41:45,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/495e4240a/b48ef0778f334ee1a07edbabbe7dfdee [2021-12-28 00:41:45,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:41:45,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:41:45,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:41:45,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:41:45,938 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:41:45,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:41:45" (1/1) ... [2021-12-28 00:41:45,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f6e59b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:45, skipping insertion in model container [2021-12-28 00:41:45,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:41:45" (1/1) ... [2021-12-28 00:41:45,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:41:45,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:41:46,131 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/product-lines/email_spec0_product05.cil.c[4289,4302] [2021-12-28 00:41:46,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:41:46,357 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:41:46,375 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/product-lines/email_spec0_product05.cil.c[4289,4302] [2021-12-28 00:41:46,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:41:46,452 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:41:46,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46 WrapperNode [2021-12-28 00:41:46,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:41:46,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:41:46,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:41:46,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:41:46,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,505 INFO L137 Inliner]: procedures = 107, calls = 125, calls flagged for inlining = 37, calls inlined = 30, statements flattened = 580 [2021-12-28 00:41:46,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:41:46,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:41:46,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:41:46,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:41:46,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,537 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:41:46,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:41:46,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:41:46,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:41:46,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (1/1) ... [2021-12-28 00:41:46,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:41:46,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:41:46,570 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) [2021-12-28 00:41:46,596 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 [2021-12-28 00:41:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2021-12-28 00:41:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2021-12-28 00:41:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2021-12-28 00:41:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2021-12-28 00:41:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2021-12-28 00:41:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2021-12-28 00:41:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-12-28 00:41:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2021-12-28 00:41:46,624 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2021-12-28 00:41:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:41:46,624 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2021-12-28 00:41:46,625 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2021-12-28 00:41:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2021-12-28 00:41:46,625 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2021-12-28 00:41:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2021-12-28 00:41:46,625 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2021-12-28 00:41:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:41:46,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:41:46,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:41:46,801 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:41:46,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:41:47,088 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:41:47,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:41:47,093 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 00:41:47,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:41:47 BoogieIcfgContainer [2021-12-28 00:41:47,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:41:47,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:41:47,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:41:47,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:41:47,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:41:45" (1/3) ... [2021-12-28 00:41:47,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66125105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:41:47, skipping insertion in model container [2021-12-28 00:41:47,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:41:46" (2/3) ... [2021-12-28 00:41:47,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66125105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:41:47, skipping insertion in model container [2021-12-28 00:41:47,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:41:47" (3/3) ... [2021-12-28 00:41:47,108 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product05.cil.c [2021-12-28 00:41:47,111 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:41:47,111 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:41:47,140 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:41:47,144 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 [2021-12-28 00:41:47,145 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:41:47,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 110 states have internal predecessors, (160), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-28 00:41:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 00:41:47,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:47,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:47,164 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:47,168 INFO L85 PathProgramCache]: Analyzing trace with hash -222738457, now seen corresponding path program 1 times [2021-12-28 00:41:47,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:47,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749576998] [2021-12-28 00:41:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:47,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 00:41:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-28 00:41:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-28 00:41:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 00:41:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 00:41:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 00:41:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 00:41:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 00:41:47,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:47,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749576998] [2021-12-28 00:41:47,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749576998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:41:47,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518772988] [2021-12-28 00:41:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:47,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:41:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:41:47,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:41:47,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 00:41:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:47,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-28 00:41:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:41:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 00:41:47,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:41:47,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518772988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:47,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:41:47,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 8 [2021-12-28 00:41:47,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163493531] [2021-12-28 00:41:47,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:47,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:41:47,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:41:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:41:47,820 INFO L87 Difference]: Start difference. First operand has 131 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 110 states have internal predecessors, (160), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:47,840 INFO L93 Difference]: Finished difference Result 212 states and 295 transitions. [2021-12-28 00:41:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:41:47,857 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2021-12-28 00:41:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:47,862 INFO L225 Difference]: With dead ends: 212 [2021-12-28 00:41:47,863 INFO L226 Difference]: Without dead ends: 124 [2021-12-28 00:41:47,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:41:47,867 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:47,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:41:47,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-28 00:41:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-28 00:41:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 102 states have (on average 1.4607843137254901) internal successors, (149), 103 states have internal predecessors, (149), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-28 00:41:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 176 transitions. [2021-12-28 00:41:47,925 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 176 transitions. Word has length 75 [2021-12-28 00:41:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:47,926 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 176 transitions. [2021-12-28 00:41:47,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:47,927 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 176 transitions. [2021-12-28 00:41:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 00:41:47,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:47,929 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:47,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 00:41:48,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-28 00:41:48,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash 61296615, now seen corresponding path program 1 times [2021-12-28 00:41:48,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:48,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748216790] [2021-12-28 00:41:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:48,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 00:41:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-28 00:41:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 00:41:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 00:41:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 00:41:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 00:41:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 00:41:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 00:41:48,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:48,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748216790] [2021-12-28 00:41:48,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748216790] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:41:48,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131801823] [2021-12-28 00:41:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:48,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:41:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:41:48,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:41:48,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 00:41:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 00:41:48,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:41:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 00:41:48,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:41:48,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131801823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:48,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:41:48,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-28 00:41:48,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204145542] [2021-12-28 00:41:48,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:48,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 00:41:48,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 00:41:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-28 00:41:48,599 INFO L87 Difference]: Start difference. First operand 124 states and 176 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:48,632 INFO L93 Difference]: Finished difference Result 202 states and 276 transitions. [2021-12-28 00:41:48,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 00:41:48,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2021-12-28 00:41:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:48,634 INFO L225 Difference]: With dead ends: 202 [2021-12-28 00:41:48,634 INFO L226 Difference]: Without dead ends: 127 [2021-12-28 00:41:48,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-28 00:41:48,636 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 1 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:48,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 346 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:41:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-28 00:41:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-12-28 00:41:48,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 105 states have internal predecessors, (151), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-28 00:41:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 178 transitions. [2021-12-28 00:41:48,646 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 178 transitions. Word has length 76 [2021-12-28 00:41:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:48,646 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 178 transitions. [2021-12-28 00:41:48,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:48,647 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 178 transitions. [2021-12-28 00:41:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 00:41:48,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:48,648 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:48,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 00:41:48,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-28 00:41:48,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash 274053016, now seen corresponding path program 1 times [2021-12-28 00:41:48,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129042985] [2021-12-28 00:41:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:48,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 00:41:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-28 00:41:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 00:41:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 00:41:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:48,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 00:41:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 00:41:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 00:41:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 00:41:49,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:49,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129042985] [2021-12-28 00:41:49,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129042985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:41:49,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159522819] [2021-12-28 00:41:49,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:49,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:41:49,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:41:49,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:41:49,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 00:41:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 00:41:49,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:41:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 00:41:49,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:41:49,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159522819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:49,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:41:49,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-28 00:41:49,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099063180] [2021-12-28 00:41:49,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:49,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:41:49,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:41:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 00:41:49,355 INFO L87 Difference]: Start difference. First operand 126 states and 178 transitions. Second operand has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 00:41:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:49,398 INFO L93 Difference]: Finished difference Result 245 states and 349 transitions. [2021-12-28 00:41:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:41:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 81 [2021-12-28 00:41:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:49,400 INFO L225 Difference]: With dead ends: 245 [2021-12-28 00:41:49,400 INFO L226 Difference]: Without dead ends: 128 [2021-12-28 00:41:49,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:41:49,402 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 73 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:49,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 592 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:41:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-28 00:41:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-12-28 00:41:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 107 states have internal predecessors, (152), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-28 00:41:49,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 181 transitions. [2021-12-28 00:41:49,412 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 181 transitions. Word has length 81 [2021-12-28 00:41:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:49,412 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 181 transitions. [2021-12-28 00:41:49,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.5) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 00:41:49,412 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 181 transitions. [2021-12-28 00:41:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 00:41:49,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:49,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:49,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 00:41:49,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:41:49,633 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:49,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:49,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1709648729, now seen corresponding path program 1 times [2021-12-28 00:41:49,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:49,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466210400] [2021-12-28 00:41:49,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:49,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 00:41:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 00:41:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 00:41:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 00:41:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 00:41:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 00:41:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 00:41:49,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:49,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466210400] [2021-12-28 00:41:49,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466210400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:49,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:49,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 00:41:49,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205524931] [2021-12-28 00:41:49,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:49,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 00:41:49,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:49,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 00:41:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:41:49,737 INFO L87 Difference]: Start difference. First operand 128 states and 181 transitions. Second operand has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 00:41:50,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:50,329 INFO L93 Difference]: Finished difference Result 342 states and 488 transitions. [2021-12-28 00:41:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 00:41:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 82 [2021-12-28 00:41:50,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:50,332 INFO L225 Difference]: With dead ends: 342 [2021-12-28 00:41:50,332 INFO L226 Difference]: Without dead ends: 233 [2021-12-28 00:41:50,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:41:50,333 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 295 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:50,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 631 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 00:41:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-28 00:41:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 128. [2021-12-28 00:41:50,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 105 states have (on average 1.4476190476190476) internal successors, (152), 107 states have internal predecessors, (152), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-28 00:41:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 180 transitions. [2021-12-28 00:41:50,347 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 180 transitions. Word has length 82 [2021-12-28 00:41:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:50,348 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 180 transitions. [2021-12-28 00:41:50,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 00:41:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 180 transitions. [2021-12-28 00:41:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-28 00:41:50,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:50,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:50,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 00:41:50,350 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash -24130620, now seen corresponding path program 2 times [2021-12-28 00:41:50,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:50,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774783226] [2021-12-28 00:41:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:50,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-28 00:41:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 00:41:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 00:41:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 00:41:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 00:41:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 00:41:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 00:41:50,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:50,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774783226] [2021-12-28 00:41:50,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774783226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:50,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:50,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 00:41:50,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268836422] [2021-12-28 00:41:50,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:50,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 00:41:50,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 00:41:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:41:50,421 INFO L87 Difference]: Start difference. First operand 128 states and 180 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 00:41:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:50,967 INFO L93 Difference]: Finished difference Result 344 states and 491 transitions. [2021-12-28 00:41:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 00:41:50,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2021-12-28 00:41:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:50,969 INFO L225 Difference]: With dead ends: 344 [2021-12-28 00:41:50,969 INFO L226 Difference]: Without dead ends: 235 [2021-12-28 00:41:50,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:41:50,970 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 292 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:50,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 630 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 00:41:50,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-28 00:41:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 130. [2021-12-28 00:41:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 106 states have (on average 1.4433962264150944) internal successors, (153), 109 states have internal predecessors, (153), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:50,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 183 transitions. [2021-12-28 00:41:50,983 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 183 transitions. Word has length 83 [2021-12-28 00:41:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:50,984 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 183 transitions. [2021-12-28 00:41:50,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 00:41:50,984 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 183 transitions. [2021-12-28 00:41:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 00:41:50,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:50,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:50,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 00:41:50,986 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:50,987 INFO L85 PathProgramCache]: Analyzing trace with hash 524770110, now seen corresponding path program 1 times [2021-12-28 00:41:50,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:50,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728882935] [2021-12-28 00:41:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:50,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 00:41:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 00:41:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 00:41:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 00:41:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 00:41:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-28 00:41:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:51,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:51,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728882935] [2021-12-28 00:41:51,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728882935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:41:51,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243788536] [2021-12-28 00:41:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:51,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:41:51,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:41:51,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:41:51,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 00:41:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 00:41:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:41:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:51,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:41:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:51,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243788536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:41:51,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 00:41:51,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2021-12-28 00:41:51,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675916833] [2021-12-28 00:41:51,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 00:41:51,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 00:41:51,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 00:41:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:51,485 INFO L87 Difference]: Start difference. First operand 130 states and 183 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 00:41:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:51,999 INFO L93 Difference]: Finished difference Result 424 states and 634 transitions. [2021-12-28 00:41:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 00:41:52,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2021-12-28 00:41:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:52,002 INFO L225 Difference]: With dead ends: 424 [2021-12-28 00:41:52,002 INFO L226 Difference]: Without dead ends: 349 [2021-12-28 00:41:52,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:41:52,003 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 572 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:52,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 746 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 00:41:52,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-28 00:41:52,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 220. [2021-12-28 00:41:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 196 states have (on average 1.6224489795918366) internal successors, (318), 199 states have internal predecessors, (318), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 348 transitions. [2021-12-28 00:41:52,021 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 348 transitions. Word has length 84 [2021-12-28 00:41:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:52,021 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 348 transitions. [2021-12-28 00:41:52,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 7 states have internal predecessors, (79), 2 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 00:41:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 348 transitions. [2021-12-28 00:41:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 00:41:52,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:52,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:52,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 00:41:52,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:41:52,241 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:52,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1301394876, now seen corresponding path program 1 times [2021-12-28 00:41:52,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:52,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742842665] [2021-12-28 00:41:52,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:52,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 00:41:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 00:41:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 00:41:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 00:41:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 00:41:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 00:41:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:52,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742842665] [2021-12-28 00:41:52,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742842665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:52,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:52,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:52,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413753238] [2021-12-28 00:41:52,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:52,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:52,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:52,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:52,355 INFO L87 Difference]: Start difference. First operand 220 states and 348 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:52,779 INFO L93 Difference]: Finished difference Result 614 states and 985 transitions. [2021-12-28 00:41:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-12-28 00:41:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:52,784 INFO L225 Difference]: With dead ends: 614 [2021-12-28 00:41:52,784 INFO L226 Difference]: Without dead ends: 422 [2021-12-28 00:41:52,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:52,785 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 287 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:52,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 558 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 00:41:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-28 00:41:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 309. [2021-12-28 00:41:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 285 states have (on average 1.6701754385964913) internal successors, (476), 288 states have internal predecessors, (476), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 506 transitions. [2021-12-28 00:41:52,802 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 506 transitions. Word has length 91 [2021-12-28 00:41:52,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:52,802 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 506 transitions. [2021-12-28 00:41:52,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 506 transitions. [2021-12-28 00:41:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 00:41:52,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:52,804 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:52,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 00:41:52,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1463575206, now seen corresponding path program 1 times [2021-12-28 00:41:52,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:52,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722930445] [2021-12-28 00:41:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:52,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 00:41:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 00:41:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-28 00:41:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 00:41:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 00:41:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 00:41:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:52,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722930445] [2021-12-28 00:41:52,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722930445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:52,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:52,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:52,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687413275] [2021-12-28 00:41:52,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:52,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:52,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:52,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:52,863 INFO L87 Difference]: Start difference. First operand 309 states and 506 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:53,229 INFO L93 Difference]: Finished difference Result 842 states and 1391 transitions. [2021-12-28 00:41:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:53,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 92 [2021-12-28 00:41:53,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:53,232 INFO L225 Difference]: With dead ends: 842 [2021-12-28 00:41:53,233 INFO L226 Difference]: Without dead ends: 569 [2021-12-28 00:41:53,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:53,234 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 285 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:53,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 555 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:41:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-12-28 00:41:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 456. [2021-12-28 00:41:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 432 states have (on average 1.6967592592592593) internal successors, (733), 435 states have internal predecessors, (733), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 763 transitions. [2021-12-28 00:41:53,253 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 763 transitions. Word has length 92 [2021-12-28 00:41:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:53,253 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 763 transitions. [2021-12-28 00:41:53,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 763 transitions. [2021-12-28 00:41:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 00:41:53,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:53,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:53,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 00:41:53,255 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:53,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:53,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1317896282, now seen corresponding path program 1 times [2021-12-28 00:41:53,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:53,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555542879] [2021-12-28 00:41:53,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:53,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 00:41:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 00:41:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-28 00:41:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 00:41:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-28 00:41:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 00:41:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:53,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:53,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555542879] [2021-12-28 00:41:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555542879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:53,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:53,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:53,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427176369] [2021-12-28 00:41:53,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:53,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:53,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:53,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:53,312 INFO L87 Difference]: Start difference. First operand 456 states and 763 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:53,690 INFO L93 Difference]: Finished difference Result 1204 states and 2026 transitions. [2021-12-28 00:41:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:53,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 93 [2021-12-28 00:41:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:53,693 INFO L225 Difference]: With dead ends: 1204 [2021-12-28 00:41:53,694 INFO L226 Difference]: Without dead ends: 803 [2021-12-28 00:41:53,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:53,695 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 283 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:53,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 555 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:41:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-12-28 00:41:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 690. [2021-12-28 00:41:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 666 states have (on average 1.7042042042042043) internal successors, (1135), 669 states have internal predecessors, (1135), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1165 transitions. [2021-12-28 00:41:53,720 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1165 transitions. Word has length 93 [2021-12-28 00:41:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:53,720 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1165 transitions. [2021-12-28 00:41:53,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1165 transitions. [2021-12-28 00:41:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-28 00:41:53,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:53,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:53,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 00:41:53,722 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:53,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1068484616, now seen corresponding path program 1 times [2021-12-28 00:41:53,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:53,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788594181] [2021-12-28 00:41:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:53,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 00:41:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 00:41:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 00:41:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 00:41:53,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 00:41:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 00:41:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:53,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:53,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788594181] [2021-12-28 00:41:53,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788594181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:53,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:53,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:53,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706369599] [2021-12-28 00:41:53,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:53,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:53,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:53,782 INFO L87 Difference]: Start difference. First operand 690 states and 1165 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:54,180 INFO L93 Difference]: Finished difference Result 1776 states and 3016 transitions. [2021-12-28 00:41:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 94 [2021-12-28 00:41:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:54,185 INFO L225 Difference]: With dead ends: 1776 [2021-12-28 00:41:54,185 INFO L226 Difference]: Without dead ends: 1179 [2021-12-28 00:41:54,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:54,187 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 281 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:54,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 555 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:41:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-12-28 00:41:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1066. [2021-12-28 00:41:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1042 states have (on average 1.7005758157389634) internal successors, (1772), 1045 states have internal predecessors, (1772), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1802 transitions. [2021-12-28 00:41:54,222 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1802 transitions. Word has length 94 [2021-12-28 00:41:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:54,223 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 1802 transitions. [2021-12-28 00:41:54,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:54,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1802 transitions. [2021-12-28 00:41:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-28 00:41:54,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:54,225 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:54,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 00:41:54,225 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1648648952, now seen corresponding path program 1 times [2021-12-28 00:41:54,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:54,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330662240] [2021-12-28 00:41:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:54,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 00:41:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 00:41:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 00:41:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 00:41:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-28 00:41:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-28 00:41:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:54,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:54,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330662240] [2021-12-28 00:41:54,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330662240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:54,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:54,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:54,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288521275] [2021-12-28 00:41:54,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:54,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:54,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:54,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:54,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:54,291 INFO L87 Difference]: Start difference. First operand 1066 states and 1802 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:54,685 INFO L93 Difference]: Finished difference Result 2711 states and 4617 transitions. [2021-12-28 00:41:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:54,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 95 [2021-12-28 00:41:54,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:54,691 INFO L225 Difference]: With dead ends: 2711 [2021-12-28 00:41:54,692 INFO L226 Difference]: Without dead ends: 1803 [2021-12-28 00:41:54,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:54,694 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 279 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:54,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 554 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:41:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-12-28 00:41:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1690. [2021-12-28 00:41:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1666 states have (on average 1.6920768307322929) internal successors, (2819), 1669 states have internal predecessors, (2819), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2849 transitions. [2021-12-28 00:41:54,774 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2849 transitions. Word has length 95 [2021-12-28 00:41:54,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:54,774 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2849 transitions. [2021-12-28 00:41:54,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2849 transitions. [2021-12-28 00:41:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-28 00:41:54,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:54,777 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:54,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 00:41:54,778 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:54,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:54,778 INFO L85 PathProgramCache]: Analyzing trace with hash -48945814, now seen corresponding path program 1 times [2021-12-28 00:41:54,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:54,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306291031] [2021-12-28 00:41:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:54,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 00:41:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 00:41:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 00:41:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 00:41:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 00:41:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 00:41:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:54,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:54,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306291031] [2021-12-28 00:41:54,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306291031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:54,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:54,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:54,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027232574] [2021-12-28 00:41:54,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:54,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:54,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:54,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:54,835 INFO L87 Difference]: Start difference. First operand 1690 states and 2849 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:55,257 INFO L93 Difference]: Finished difference Result 4038 states and 6896 transitions. [2021-12-28 00:41:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 96 [2021-12-28 00:41:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:55,266 INFO L225 Difference]: With dead ends: 4038 [2021-12-28 00:41:55,266 INFO L226 Difference]: Without dead ends: 2686 [2021-12-28 00:41:55,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:55,269 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 277 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:55,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 546 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:41:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-12-28 00:41:55,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2573. [2021-12-28 00:41:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2549 states have (on average 1.6881129854845038) internal successors, (4303), 2552 states have internal predecessors, (4303), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4333 transitions. [2021-12-28 00:41:55,379 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4333 transitions. Word has length 96 [2021-12-28 00:41:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:55,379 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4333 transitions. [2021-12-28 00:41:55,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4333 transitions. [2021-12-28 00:41:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-28 00:41:55,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:55,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:55,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 00:41:55,385 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1971076502, now seen corresponding path program 1 times [2021-12-28 00:41:55,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:55,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911034044] [2021-12-28 00:41:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:55,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 00:41:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 00:41:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 00:41:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 00:41:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 00:41:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 00:41:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:55,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:55,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911034044] [2021-12-28 00:41:55,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911034044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:55,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:55,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:55,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589480568] [2021-12-28 00:41:55,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:55,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:55,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:55,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:55,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:55,463 INFO L87 Difference]: Start difference. First operand 2573 states and 4333 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:55,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:55,909 INFO L93 Difference]: Finished difference Result 6547 states and 11148 transitions. [2021-12-28 00:41:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 97 [2021-12-28 00:41:55,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:55,923 INFO L225 Difference]: With dead ends: 6547 [2021-12-28 00:41:55,924 INFO L226 Difference]: Without dead ends: 4455 [2021-12-28 00:41:55,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:55,928 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 277 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:55,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 549 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:41:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4455 states. [2021-12-28 00:41:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4455 to 4342. [2021-12-28 00:41:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4342 states, 4318 states have (on average 1.6764705882352942) internal successors, (7239), 4321 states have internal predecessors, (7239), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4342 states to 4342 states and 7269 transitions. [2021-12-28 00:41:56,102 INFO L78 Accepts]: Start accepts. Automaton has 4342 states and 7269 transitions. Word has length 97 [2021-12-28 00:41:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:56,102 INFO L470 AbstractCegarLoop]: Abstraction has 4342 states and 7269 transitions. [2021-12-28 00:41:56,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:56,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4342 states and 7269 transitions. [2021-12-28 00:41:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-28 00:41:56,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:56,110 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:56,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 00:41:56,110 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash -18541512, now seen corresponding path program 1 times [2021-12-28 00:41:56,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:56,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308047037] [2021-12-28 00:41:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:56,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 00:41:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-28 00:41:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 00:41:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 00:41:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 00:41:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 00:41:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:56,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:56,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308047037] [2021-12-28 00:41:56,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308047037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:56,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:56,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:56,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883366144] [2021-12-28 00:41:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:56,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:56,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:56,170 INFO L87 Difference]: Start difference. First operand 4342 states and 7269 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:56,773 INFO L93 Difference]: Finished difference Result 11343 states and 19176 transitions. [2021-12-28 00:41:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 98 [2021-12-28 00:41:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:56,796 INFO L225 Difference]: With dead ends: 11343 [2021-12-28 00:41:56,796 INFO L226 Difference]: Without dead ends: 7706 [2021-12-28 00:41:56,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:56,801 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 273 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:56,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 554 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 00:41:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-12-28 00:41:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 7593. [2021-12-28 00:41:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7569 states have (on average 1.6628352490421456) internal successors, (12586), 7572 states have internal predecessors, (12586), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 12616 transitions. [2021-12-28 00:41:57,052 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 12616 transitions. Word has length 98 [2021-12-28 00:41:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:57,053 INFO L470 AbstractCegarLoop]: Abstraction has 7593 states and 12616 transitions. [2021-12-28 00:41:57,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 12616 transitions. [2021-12-28 00:41:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 00:41:57,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:57,065 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:57,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 00:41:57,065 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:57,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1347268801, now seen corresponding path program 2 times [2021-12-28 00:41:57,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:57,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013587752] [2021-12-28 00:41:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:57,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 00:41:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 00:41:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 00:41:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 00:41:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 00:41:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 00:41:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-28 00:41:57,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:57,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013587752] [2021-12-28 00:41:57,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013587752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:57,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:57,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:57,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910775835] [2021-12-28 00:41:57,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:57,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:57,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:57,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:57,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:57,125 INFO L87 Difference]: Start difference. First operand 7593 states and 12616 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:57,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:57,795 INFO L93 Difference]: Finished difference Result 14154 states and 23639 transitions. [2021-12-28 00:41:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:57,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 99 [2021-12-28 00:41:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:57,828 INFO L225 Difference]: With dead ends: 14154 [2021-12-28 00:41:57,828 INFO L226 Difference]: Without dead ends: 7706 [2021-12-28 00:41:57,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:57,841 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 287 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:57,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 785 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 00:41:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-12-28 00:41:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 7593. [2021-12-28 00:41:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7593 states, 7569 states have (on average 1.6447351037125115) internal successors, (12449), 7572 states have internal predecessors, (12449), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7593 states to 7593 states and 12479 transitions. [2021-12-28 00:41:58,090 INFO L78 Accepts]: Start accepts. Automaton has 7593 states and 12479 transitions. Word has length 99 [2021-12-28 00:41:58,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:58,090 INFO L470 AbstractCegarLoop]: Abstraction has 7593 states and 12479 transitions. [2021-12-28 00:41:58,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 7593 states and 12479 transitions. [2021-12-28 00:41:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-28 00:41:58,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:58,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:58,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 00:41:58,102 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:58,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:58,103 INFO L85 PathProgramCache]: Analyzing trace with hash -62251596, now seen corresponding path program 1 times [2021-12-28 00:41:58,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:58,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102099479] [2021-12-28 00:41:58,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:58,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 00:41:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 00:41:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-28 00:41:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-28 00:41:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 00:41:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 00:41:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:58,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:58,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102099479] [2021-12-28 00:41:58,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102099479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:58,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:58,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:58,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733919844] [2021-12-28 00:41:58,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:58,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:58,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:58,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:58,160 INFO L87 Difference]: Start difference. First operand 7593 states and 12479 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:41:58,957 INFO L93 Difference]: Finished difference Result 20417 states and 33780 transitions. [2021-12-28 00:41:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:41:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 99 [2021-12-28 00:41:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:41:59,019 INFO L225 Difference]: With dead ends: 20417 [2021-12-28 00:41:59,020 INFO L226 Difference]: Without dead ends: 13817 [2021-12-28 00:41:59,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:41:59,043 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 272 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 00:41:59,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 552 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 00:41:59,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13817 states. [2021-12-28 00:41:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13817 to 13704. [2021-12-28 00:41:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13704 states, 13680 states have (on average 1.6266812865497076) internal successors, (22253), 13683 states have internal predecessors, (22253), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:41:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13704 states to 13704 states and 22283 transitions. [2021-12-28 00:41:59,722 INFO L78 Accepts]: Start accepts. Automaton has 13704 states and 22283 transitions. Word has length 99 [2021-12-28 00:41:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:41:59,723 INFO L470 AbstractCegarLoop]: Abstraction has 13704 states and 22283 transitions. [2021-12-28 00:41:59,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:41:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 13704 states and 22283 transitions. [2021-12-28 00:41:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-28 00:41:59,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:41:59,740 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:41:59,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 00:41:59,740 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:41:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:41:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -814529510, now seen corresponding path program 1 times [2021-12-28 00:41:59,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:41:59,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982896723] [2021-12-28 00:41:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:41:59,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:41:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:41:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:41:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:41:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-28 00:41:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 00:41:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 00:41:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 00:41:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 00:41:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-28 00:41:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:41:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:41:59,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:41:59,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982896723] [2021-12-28 00:41:59,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982896723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:41:59,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:41:59,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:41:59,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491983939] [2021-12-28 00:41:59,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:41:59,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:41:59,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:41:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:41:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:41:59,800 INFO L87 Difference]: Start difference. First operand 13704 states and 22283 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:42:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:42:00,743 INFO L93 Difference]: Finished difference Result 37829 states and 61752 transitions. [2021-12-28 00:42:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:42:00,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 100 [2021-12-28 00:42:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:42:00,800 INFO L225 Difference]: With dead ends: 37829 [2021-12-28 00:42:00,800 INFO L226 Difference]: Without dead ends: 25478 [2021-12-28 00:42:00,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:42:00,821 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 269 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:42:00,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 555 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:42:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25478 states. [2021-12-28 00:42:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25478 to 25365. [2021-12-28 00:42:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25365 states, 25341 states have (on average 1.605066887652421) internal successors, (40674), 25344 states have internal predecessors, (40674), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:42:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25365 states to 25365 states and 40704 transitions. [2021-12-28 00:42:01,589 INFO L78 Accepts]: Start accepts. Automaton has 25365 states and 40704 transitions. Word has length 100 [2021-12-28 00:42:01,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:42:01,589 INFO L470 AbstractCegarLoop]: Abstraction has 25365 states and 40704 transitions. [2021-12-28 00:42:01,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:42:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 25365 states and 40704 transitions. [2021-12-28 00:42:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-28 00:42:01,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:42:01,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:42:01,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 00:42:01,707 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:42:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:42:01,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1099912658, now seen corresponding path program 1 times [2021-12-28 00:42:01,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:42:01,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598513957] [2021-12-28 00:42:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:01,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:42:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:42:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:42:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:42:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-28 00:42:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 00:42:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 00:42:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-28 00:42:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-28 00:42:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-28 00:42:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:42:01,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:42:01,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598513957] [2021-12-28 00:42:01,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598513957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:42:01,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:42:01,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:42:01,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345946886] [2021-12-28 00:42:01,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:42:01,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:42:01,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:42:01,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:42:01,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:42:01,773 INFO L87 Difference]: Start difference. First operand 25365 states and 40704 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:42:03,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:42:03,130 INFO L93 Difference]: Finished difference Result 47982 states and 76863 transitions. [2021-12-28 00:42:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:42:03,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 101 [2021-12-28 00:42:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:42:03,253 INFO L225 Difference]: With dead ends: 47982 [2021-12-28 00:42:03,253 INFO L226 Difference]: Without dead ends: 47907 [2021-12-28 00:42:03,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:42:03,272 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 267 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:42:03,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 554 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:42:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47907 states. [2021-12-28 00:42:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47907 to 47794. [2021-12-28 00:42:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47794 states, 47770 states have (on average 1.5801130416579443) internal successors, (75482), 47773 states have internal predecessors, (75482), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:42:04,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47794 states to 47794 states and 75512 transitions. [2021-12-28 00:42:04,655 INFO L78 Accepts]: Start accepts. Automaton has 47794 states and 75512 transitions. Word has length 101 [2021-12-28 00:42:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:42:04,655 INFO L470 AbstractCegarLoop]: Abstraction has 47794 states and 75512 transitions. [2021-12-28 00:42:04,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:42:04,655 INFO L276 IsEmpty]: Start isEmpty. Operand 47794 states and 75512 transitions. [2021-12-28 00:42:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 00:42:04,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:42:04,680 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:42:04,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 00:42:04,680 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:42:04,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:42:04,681 INFO L85 PathProgramCache]: Analyzing trace with hash 220444072, now seen corresponding path program 1 times [2021-12-28 00:42:04,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:42:04,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392771228] [2021-12-28 00:42:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:04,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:42:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:42:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:42:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:42:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 00:42:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 00:42:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 00:42:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 00:42:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 00:42:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 00:42:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:42:04,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:42:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392771228] [2021-12-28 00:42:04,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392771228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:42:04,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138345599] [2021-12-28 00:42:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:04,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:42:04,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:42:04,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:42:04,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 00:42:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 00:42:04,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:42:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 00:42:05,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:42:05,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138345599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:42:05,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:42:05,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 00:42:05,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918820629] [2021-12-28 00:42:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:42:05,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 00:42:05,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:42:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 00:42:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:42:05,067 INFO L87 Difference]: Start difference. First operand 47794 states and 75512 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:42:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:42:06,570 INFO L93 Difference]: Finished difference Result 93375 states and 147900 transitions. [2021-12-28 00:42:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 00:42:06,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 102 [2021-12-28 00:42:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:42:06,689 INFO L225 Difference]: With dead ends: 93375 [2021-12-28 00:42:06,689 INFO L226 Difference]: Without dead ends: 47768 [2021-12-28 00:42:06,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:42:06,748 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 55 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:42:06,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 409 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:42:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47768 states. [2021-12-28 00:42:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47768 to 47760. [2021-12-28 00:42:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47760 states, 47736 states have (on average 1.5586349924585219) internal successors, (74403), 47739 states have internal predecessors, (74403), 14 states have call successors, (14), 7 states have call predecessors, (14), 9 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2021-12-28 00:42:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47760 states to 47760 states and 74433 transitions. [2021-12-28 00:42:08,275 INFO L78 Accepts]: Start accepts. Automaton has 47760 states and 74433 transitions. Word has length 102 [2021-12-28 00:42:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:42:08,276 INFO L470 AbstractCegarLoop]: Abstraction has 47760 states and 74433 transitions. [2021-12-28 00:42:08,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:42:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 47760 states and 74433 transitions. [2021-12-28 00:42:08,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-28 00:42:08,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:42:08,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:42:08,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 00:42:08,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:42:08,520 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:42:08,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:42:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2054476804, now seen corresponding path program 1 times [2021-12-28 00:42:08,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:42:08,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080070665] [2021-12-28 00:42:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:08,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:42:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:42:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:42:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:42:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 00:42:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 00:42:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 00:42:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 00:42:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-28 00:42:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 00:42:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 00:42:08,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:42:08,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080070665] [2021-12-28 00:42:08,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080070665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:42:08,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639636536] [2021-12-28 00:42:08,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:08,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:42:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:42:08,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:42:08,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 00:42:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 00:42:08,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:42:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 00:42:09,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:42:09,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639636536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:42:09,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:42:09,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 28 [2021-12-28 00:42:09,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427814618] [2021-12-28 00:42:09,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:42:09,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 00:42:09,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:42:09,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 00:42:09,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-12-28 00:42:09,219 INFO L87 Difference]: Start difference. First operand 47760 states and 74433 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-28 00:42:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:42:11,093 INFO L93 Difference]: Finished difference Result 48022 states and 74780 transitions. [2021-12-28 00:42:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 00:42:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 102 [2021-12-28 00:42:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:42:11,213 INFO L225 Difference]: With dead ends: 48022 [2021-12-28 00:42:11,214 INFO L226 Difference]: Without dead ends: 47953 [2021-12-28 00:42:11,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-12-28 00:42:11,232 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 455 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:42:11,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 1919 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 00:42:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47953 states. [2021-12-28 00:42:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47953 to 47867. [2021-12-28 00:42:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47867 states, 47822 states have (on average 1.5582158839028062) internal successors, (74517), 47826 states have internal predecessors, (74517), 26 states have call successors, (26), 13 states have call predecessors, (26), 18 states have return successors, (34), 27 states have call predecessors, (34), 24 states have call successors, (34) [2021-12-28 00:42:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47867 states to 47867 states and 74577 transitions. [2021-12-28 00:42:12,914 INFO L78 Accepts]: Start accepts. Automaton has 47867 states and 74577 transitions. Word has length 102 [2021-12-28 00:42:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:42:12,914 INFO L470 AbstractCegarLoop]: Abstraction has 47867 states and 74577 transitions. [2021-12-28 00:42:12,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 10 states have internal predecessors, (79), 5 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-28 00:42:12,914 INFO L276 IsEmpty]: Start isEmpty. Operand 47867 states and 74577 transitions. [2021-12-28 00:42:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 00:42:12,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:42:12,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:42:12,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 00:42:13,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:42:13,156 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:42:13,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:42:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1759949049, now seen corresponding path program 1 times [2021-12-28 00:42:13,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:42:13,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814762174] [2021-12-28 00:42:13,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:13,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:42:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:42:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:42:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:42:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 00:42:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 00:42:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 00:42:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 00:42:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 00:42:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 00:42:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:42:13,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:42:13,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814762174] [2021-12-28 00:42:13,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814762174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:42:13,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:42:13,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 00:42:13,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28446256] [2021-12-28 00:42:13,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:42:13,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 00:42:13,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:42:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 00:42:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:42:13,239 INFO L87 Difference]: Start difference. First operand 47867 states and 74577 transitions. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:42:16,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:42:16,691 INFO L93 Difference]: Finished difference Result 94271 states and 147072 transitions. [2021-12-28 00:42:16,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-28 00:42:16,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2021-12-28 00:42:16,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:42:16,950 INFO L225 Difference]: With dead ends: 94271 [2021-12-28 00:42:16,951 INFO L226 Difference]: Without dead ends: 94104 [2021-12-28 00:42:16,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2021-12-28 00:42:16,984 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 608 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 00:42:16,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 698 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 00:42:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94104 states. [2021-12-28 00:42:20,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94104 to 93626. [2021-12-28 00:42:20,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93626 states, 93533 states have (on average 1.5607860327371088) internal successors, (145985), 93542 states have internal predecessors, (145985), 55 states have call successors, (55), 24 states have call predecessors, (55), 37 states have return successors, (76), 59 states have call predecessors, (76), 51 states have call successors, (76) [2021-12-28 00:42:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93626 states to 93626 states and 146116 transitions. [2021-12-28 00:42:20,394 INFO L78 Accepts]: Start accepts. Automaton has 93626 states and 146116 transitions. Word has length 103 [2021-12-28 00:42:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:42:20,394 INFO L470 AbstractCegarLoop]: Abstraction has 93626 states and 146116 transitions. [2021-12-28 00:42:20,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-28 00:42:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 93626 states and 146116 transitions. [2021-12-28 00:42:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 00:42:20,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:42:20,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:42:20,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 00:42:20,434 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:42:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:42:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash 85103677, now seen corresponding path program 1 times [2021-12-28 00:42:20,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:42:20,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842709612] [2021-12-28 00:42:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:20,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:42:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:42:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:42:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:42:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 00:42:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 00:42:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 00:42:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 00:42:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 00:42:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 00:42:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-28 00:42:20,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:42:20,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842709612] [2021-12-28 00:42:20,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842709612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:42:20,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:42:20,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-28 00:42:20,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512135993] [2021-12-28 00:42:20,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:42:20,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 00:42:20,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:42:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 00:42:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-28 00:42:20,538 INFO L87 Difference]: Start difference. First operand 93626 states and 146116 transitions. Second operand has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-28 00:42:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:42:24,493 INFO L93 Difference]: Finished difference Result 94992 states and 148071 transitions. [2021-12-28 00:42:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 00:42:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 103 [2021-12-28 00:42:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:42:24,766 INFO L225 Difference]: With dead ends: 94992 [2021-12-28 00:42:24,766 INFO L226 Difference]: Without dead ends: 94228 [2021-12-28 00:42:24,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2021-12-28 00:42:24,794 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 522 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:42:24,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 1084 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 00:42:24,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94228 states. [2021-12-28 00:42:27,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94228 to 93650. [2021-12-28 00:42:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93650 states, 93551 states have (on average 1.5606781327831878) internal successors, (146003), 93557 states have internal predecessors, (146003), 63 states have call successors, (63), 28 states have call predecessors, (63), 35 states have return successors, (84), 64 states have call predecessors, (84), 59 states have call successors, (84) [2021-12-28 00:42:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93650 states to 93650 states and 146150 transitions. [2021-12-28 00:42:28,134 INFO L78 Accepts]: Start accepts. Automaton has 93650 states and 146150 transitions. Word has length 103 [2021-12-28 00:42:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:42:28,134 INFO L470 AbstractCegarLoop]: Abstraction has 93650 states and 146150 transitions. [2021-12-28 00:42:28,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-28 00:42:28,135 INFO L276 IsEmpty]: Start isEmpty. Operand 93650 states and 146150 transitions. [2021-12-28 00:42:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 00:42:28,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:42:28,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:42:28,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 00:42:28,203 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:42:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:42:28,203 INFO L85 PathProgramCache]: Analyzing trace with hash -628188738, now seen corresponding path program 1 times [2021-12-28 00:42:28,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:42:28,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451387424] [2021-12-28 00:42:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:28,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:42:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:42:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:42:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:42:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 00:42:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 00:42:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 00:42:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 00:42:28,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 00:42:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 00:42:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 00:42:28,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:42:28,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451387424] [2021-12-28 00:42:28,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451387424] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:42:28,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364855646] [2021-12-28 00:42:28,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:28,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:42:28,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:42:28,276 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:42:28,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 00:42:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:28,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 00:42:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:42:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 00:42:28,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:42:28,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364855646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:42:28,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:42:28,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-12-28 00:42:28,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212600011] [2021-12-28 00:42:28,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:42:28,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:42:28,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:42:28,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:42:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 00:42:28,578 INFO L87 Difference]: Start difference. First operand 93650 states and 146150 transitions. Second operand has 5 states, 4 states have (on average 19.5) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 00:42:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:42:31,061 INFO L93 Difference]: Finished difference Result 93848 states and 146414 transitions. [2021-12-28 00:42:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:42:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 19.5) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-12-28 00:42:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:42:31,286 INFO L225 Difference]: With dead ends: 93848 [2021-12-28 00:42:31,286 INFO L226 Difference]: Without dead ends: 93658 [2021-12-28 00:42:31,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:42:31,311 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 7 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:42:31,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 666 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:42:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93658 states. [2021-12-28 00:42:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93658 to 93654. [2021-12-28 00:42:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93654 states, 93553 states have (on average 1.560666146462433) internal successors, (146005), 93561 states have internal predecessors, (146005), 63 states have call successors, (63), 28 states have call predecessors, (63), 37 states have return successors, (88), 64 states have call predecessors, (88), 59 states have call successors, (88) [2021-12-28 00:42:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93654 states to 93654 states and 146156 transitions. [2021-12-28 00:42:34,553 INFO L78 Accepts]: Start accepts. Automaton has 93654 states and 146156 transitions. Word has length 103 [2021-12-28 00:42:34,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:42:34,553 INFO L470 AbstractCegarLoop]: Abstraction has 93654 states and 146156 transitions. [2021-12-28 00:42:34,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 19.5) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 00:42:34,553 INFO L276 IsEmpty]: Start isEmpty. Operand 93654 states and 146156 transitions. [2021-12-28 00:42:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 00:42:34,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:42:34,777 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:42:34,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 00:42:34,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:42:34,993 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:42:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:42:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1821411392, now seen corresponding path program 1 times [2021-12-28 00:42:34,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:42:34,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136103773] [2021-12-28 00:42:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:34,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:42:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-28 00:42:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 00:42:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 00:42:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 00:42:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 00:42:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 00:42:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 00:42:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-28 00:42:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 00:42:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 00:42:35,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:42:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136103773] [2021-12-28 00:42:35,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136103773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:42:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070784268] [2021-12-28 00:42:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:42:35,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:42:35,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:42:35,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:42:35,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 00:42:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:42:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-28 00:42:35,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:42:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-28 00:42:35,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:42:35,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070784268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:42:35,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:42:35,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2021-12-28 00:42:35,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915727006] [2021-12-28 00:42:35,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:42:35,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 00:42:35,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:42:35,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 00:42:35,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:42:35,476 INFO L87 Difference]: Start difference. First operand 93654 states and 146156 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 6 states have internal predecessors, (75), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9)