./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/ntdrivers/floppy.i.cil-3.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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:44:49,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:44:49,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:44:49,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:44:49,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:44:49,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:44:49,059 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:44:49,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:44:49,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:44:49,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:44:49,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:44:49,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:44:49,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:44:49,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:44:49,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:44:49,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:44:49,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:44:49,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:44:49,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:44:49,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:44:49,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:44:49,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:44:49,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:44:49,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:44:49,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:44:49,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:44:49,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:44:49,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:44:49,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:44:49,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:44:49,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:44:49,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:44:49,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:44:49,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:44:49,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:44:49,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:44:49,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:44:49,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:44:49,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:44:49,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:44:49,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:44:49,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:44:49,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:44:49,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:44:49,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:44:49,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:44:49,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:44:49,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:44:49,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:44:49,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:44:49,126 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:44:49,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:44:49,126 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:44:49,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:44:49,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:44:49,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:44:49,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:44:49,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:44:49,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:44:49,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:44:49,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:44:49,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:44:49,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:44:49,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:44:49,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:44:49,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:44:49,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:44:49,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:44:49,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:44:49,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:44:49,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:44:49,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:44:49,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:44:49,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:44:49,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:44:49,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:44:49,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2021-12-14 11:44:49,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:44:49,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:44:49,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:44:49,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:44:49,395 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:44:49,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-12-14 11:44:49,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b979499/32f2620b448a4eb08bec304a189cd1fd/FLAG0dc4b128e [2021-12-14 11:44:50,099 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:44:50,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-12-14 11:44:50,152 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b979499/32f2620b448a4eb08bec304a189cd1fd/FLAG0dc4b128e [2021-12-14 11:44:50,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50b979499/32f2620b448a4eb08bec304a189cd1fd [2021-12-14 11:44:50,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:44:50,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:44:50,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:44:50,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:44:50,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:44:50,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:44:50" (1/1) ... [2021-12-14 11:44:50,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39dfea20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:50, skipping insertion in model container [2021-12-14 11:44:50,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:44:50" (1/1) ... [2021-12-14 11:44:50,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:44:50,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:44:51,210 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/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-12-14 11:44:51,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:44:51,733 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:44:51,786 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/ntdrivers/floppy.i.cil-3.c[77246,77259] [2021-12-14 11:44:52,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:44:52,103 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:44:52,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52 WrapperNode [2021-12-14 11:44:52,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:44:52,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:44:52,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:44:52,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:44:52,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,342 INFO L137 Inliner]: procedures = 128, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3086 [2021-12-14 11:44:52,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:44:52,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:44:52,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:44:52,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:44:52,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,391 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:44:52,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:44:52,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:44:52,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:44:52,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (1/1) ... [2021-12-14 11:44:52,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:44:52,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:44:52,629 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) [2021-12-14 11:44:52,658 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 [2021-12-14 11:44:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2021-12-14 11:44:52,680 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2021-12-14 11:44:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 11:44:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 11:44:52,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 11:44:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:44:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-14 11:44:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-14 11:44:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2021-12-14 11:44:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2021-12-14 11:44:52,681 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2021-12-14 11:44:52,681 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2021-12-14 11:44:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:44:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2021-12-14 11:44:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2021-12-14 11:44:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-14 11:44:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-14 11:44:52,682 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2021-12-14 11:44:52,682 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2021-12-14 11:44:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 11:44:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 11:44:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-14 11:44:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-14 11:44:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2021-12-14 11:44:52,683 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2021-12-14 11:44:52,683 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2021-12-14 11:44:52,684 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2021-12-14 11:44:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 11:44:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:44:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2021-12-14 11:44:52,684 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2021-12-14 11:44:52,684 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2021-12-14 11:44:52,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2021-12-14 11:44:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:44:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 11:44:52,685 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-14 11:44:52,685 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-14 11:44:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 11:44:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2021-12-14 11:44:52,686 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2021-12-14 11:44:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:44:52,686 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-14 11:44:52,687 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-14 11:44:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-14 11:44:52,687 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-14 11:44:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:44:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2021-12-14 11:44:52,687 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2021-12-14 11:44:52,687 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2021-12-14 11:44:52,688 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2021-12-14 11:44:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 11:44:52,688 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-14 11:44:52,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-14 11:44:52,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:44:52,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:44:53,138 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:44:53,140 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:44:53,188 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,197 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-14 11:44:53,197 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-14 11:44:53,199 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-12-14 11:44:53,293 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-12-14 11:44:53,311 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,321 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-14 11:44:53,322 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-14 11:44:53,392 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,436 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2021-12-14 11:44:53,437 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2021-12-14 11:44:53,437 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,438 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,438 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,533 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2021-12-14 11:44:53,534 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2021-12-14 11:44:53,535 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2021-12-14 11:44:53,537 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,542 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:53,543 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,004 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2021-12-14 11:44:54,004 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2021-12-14 11:44:54,005 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2021-12-14 11:44:54,005 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2021-12-14 11:44:54,005 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2021-12-14 11:44:54,005 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2021-12-14 11:44:54,029 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,060 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-14 11:44:54,060 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-14 11:44:54,074 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,075 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,076 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,077 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,078 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,080 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,082 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:54,083 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-14 11:44:57,740 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2021-12-14 11:44:57,740 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2021-12-14 11:44:57,740 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2021-12-14 11:44:57,740 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2021-12-14 11:44:57,740 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2021-12-14 11:44:57,741 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2021-12-14 11:44:57,742 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2021-12-14 11:44:57,750 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:44:57,766 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:44:57,768 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 11:44:57,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:44:57 BoogieIcfgContainer [2021-12-14 11:44:57,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:44:57,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:44:57,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:44:57,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:44:57,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:44:50" (1/3) ... [2021-12-14 11:44:57,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dc3e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:44:57, skipping insertion in model container [2021-12-14 11:44:57,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:44:52" (2/3) ... [2021-12-14 11:44:57,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14dc3e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:44:57, skipping insertion in model container [2021-12-14 11:44:57,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:44:57" (3/3) ... [2021-12-14 11:44:57,787 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2021-12-14 11:44:57,794 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:44:57,794 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:44:57,845 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:44:57,850 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 [2021-12-14 11:44:57,850 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:44:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2021-12-14 11:44:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 11:44:57,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:44:57,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:44:57,890 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:44:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:44:57,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2021-12-14 11:44:57,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:44:57,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403295346] [2021-12-14 11:44:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:44:57,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:44:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:58,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:44:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:58,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:44:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:44:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:44:58,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:44:58,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403295346] [2021-12-14 11:44:58,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403295346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:44:58,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:44:58,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:44:58,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268087533] [2021-12-14 11:44:58,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:44:58,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:44:58,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:44:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:44:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:44:58,520 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:45:02,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:02,823 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2021-12-14 11:45:02,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 11:45:02,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-14 11:45:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:02,839 INFO L225 Difference]: With dead ends: 1174 [2021-12-14 11:45:02,839 INFO L226 Difference]: Without dead ends: 657 [2021-12-14 11:45:02,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:45:02,849 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 400 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 238 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:02,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 2225 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 716 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-12-14 11:45:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-12-14 11:45:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2021-12-14 11:45:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-14 11:45:02,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2021-12-14 11:45:02,934 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2021-12-14 11:45:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:02,935 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2021-12-14 11:45:02,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:45:02,935 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2021-12-14 11:45:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-14 11:45:02,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:02,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:02,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:45:02,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2021-12-14 11:45:02,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:02,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380463874] [2021-12-14 11:45:02,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:02,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:03,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:03,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:03,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:03,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380463874] [2021-12-14 11:45:03,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380463874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:03,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:03,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 11:45:03,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607115147] [2021-12-14 11:45:03,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:03,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:45:03,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:45:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:45:03,189 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:07,419 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:07,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:07,694 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2021-12-14 11:45:07,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 11:45:07,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-12-14 11:45:07,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:07,699 INFO L225 Difference]: With dead ends: 1217 [2021-12-14 11:45:07,699 INFO L226 Difference]: Without dead ends: 657 [2021-12-14 11:45:07,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 11:45:07,703 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 366 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:07,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 2901 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 850 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-12-14 11:45:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-12-14 11:45:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2021-12-14 11:45:07,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-14 11:45:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2021-12-14 11:45:07,735 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2021-12-14 11:45:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:07,736 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2021-12-14 11:45:07,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:07,736 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2021-12-14 11:45:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-14 11:45:07,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:07,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:07,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 11:45:07,738 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2021-12-14 11:45:07,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:07,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477308360] [2021-12-14 11:45:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:07,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:07,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:07,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:07,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477308360] [2021-12-14 11:45:07,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477308360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:07,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:07,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:45:07,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963871105] [2021-12-14 11:45:07,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:07,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:45:07,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:07,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:45:07,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:07,996 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:11,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:12,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:12,602 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2021-12-14 11:45:12,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 11:45:12,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-12-14 11:45:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:12,609 INFO L225 Difference]: With dead ends: 1542 [2021-12-14 11:45:12,609 INFO L226 Difference]: Without dead ends: 1127 [2021-12-14 11:45:12,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:45:12,612 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 1330 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:12,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 2484 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 973 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-12-14 11:45:12,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-12-14 11:45:12,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2021-12-14 11:45:12,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2021-12-14 11:45:12,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2021-12-14 11:45:12,656 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2021-12-14 11:45:12,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:12,657 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2021-12-14 11:45:12,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:12,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2021-12-14 11:45:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 11:45:12,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:12,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:12,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 11:45:12,665 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:12,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:12,666 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2021-12-14 11:45:12,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:12,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479455751] [2021-12-14 11:45:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:12,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:12,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:12,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-14 11:45:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:12,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:12,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479455751] [2021-12-14 11:45:12,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479455751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:12,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:12,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:45:12,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668654473] [2021-12-14 11:45:12,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:12,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:45:12,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:45:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:12,957 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 11:45:16,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:17,348 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2021-12-14 11:45:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 11:45:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2021-12-14 11:45:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:17,363 INFO L225 Difference]: With dead ends: 1879 [2021-12-14 11:45:17,363 INFO L226 Difference]: Without dead ends: 1860 [2021-12-14 11:45:17,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:45:17,367 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 1460 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:17,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1530 Valid, 2102 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 771 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-14 11:45:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-12-14 11:45:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2021-12-14 11:45:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2021-12-14 11:45:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2021-12-14 11:45:17,455 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2021-12-14 11:45:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:17,456 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2021-12-14 11:45:17,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 11:45:17,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2021-12-14 11:45:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 11:45:17,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:17,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:17,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 11:45:17,460 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2021-12-14 11:45:17,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:17,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455471559] [2021-12-14 11:45:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:17,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:17,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:17,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:17,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455471559] [2021-12-14 11:45:17,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455471559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:17,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:17,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:45:17,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805442958] [2021-12-14 11:45:17,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:17,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:45:17,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:45:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:17,658 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:21,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:21,793 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2021-12-14 11:45:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 11:45:21,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-14 11:45:21,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:21,805 INFO L225 Difference]: With dead ends: 1856 [2021-12-14 11:45:21,805 INFO L226 Difference]: Without dead ends: 1852 [2021-12-14 11:45:21,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:45:21,807 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 467 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 246 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:21,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 2099 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 711 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2021-12-14 11:45:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-12-14 11:45:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2021-12-14 11:45:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2021-12-14 11:45:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2021-12-14 11:45:21,874 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2021-12-14 11:45:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:21,874 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2021-12-14 11:45:21,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:21,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2021-12-14 11:45:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 11:45:21,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:21,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:21,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 11:45:21,876 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:21,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2021-12-14 11:45:21,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:21,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186027726] [2021-12-14 11:45:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:21,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:22,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:22,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:22,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:22,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186027726] [2021-12-14 11:45:22,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186027726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:22,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:22,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 11:45:22,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420513020] [2021-12-14 11:45:22,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:22,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 11:45:22,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 11:45:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:45:22,098 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:25,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:27,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:27,349 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2021-12-14 11:45:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 11:45:27,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-14 11:45:27,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:27,369 INFO L225 Difference]: With dead ends: 3293 [2021-12-14 11:45:27,370 INFO L226 Difference]: Without dead ends: 3290 [2021-12-14 11:45:27,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:45:27,374 INFO L933 BasicCegarLoop]: 1177 mSDtfsCounter, 925 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 310 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:27,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 3028 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1114 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-12-14 11:45:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-12-14 11:45:27,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2021-12-14 11:45:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2021-12-14 11:45:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2021-12-14 11:45:27,498 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2021-12-14 11:45:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:27,499 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2021-12-14 11:45:27,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-14 11:45:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2021-12-14 11:45:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 11:45:27,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:27,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:27,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 11:45:27,502 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:27,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2021-12-14 11:45:27,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:27,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132629370] [2021-12-14 11:45:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:27,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:27,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:27,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-14 11:45:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:27,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 11:45:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:27,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:27,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132629370] [2021-12-14 11:45:27,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132629370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:27,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:27,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 11:45:27,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119371306] [2021-12-14 11:45:27,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:27,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:45:27,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:27,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:45:27,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:45:27,812 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:45:32,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:33,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:33,901 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2021-12-14 11:45:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 11:45:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-12-14 11:45:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:33,923 INFO L225 Difference]: With dead ends: 3942 [2021-12-14 11:45:33,923 INFO L226 Difference]: Without dead ends: 3937 [2021-12-14 11:45:33,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-14 11:45:33,927 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1251 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 602 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:33,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 2952 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1590 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-12-14 11:45:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2021-12-14 11:45:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2021-12-14 11:45:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2021-12-14 11:45:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2021-12-14 11:45:34,066 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2021-12-14 11:45:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:34,066 INFO L470 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2021-12-14 11:45:34,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 11:45:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2021-12-14 11:45:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 11:45:34,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:34,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:34,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 11:45:34,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:34,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2021-12-14 11:45:34,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:34,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437723689] [2021-12-14 11:45:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:34,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:34,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:34,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:34,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:34,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437723689] [2021-12-14 11:45:34,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437723689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:34,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:34,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 11:45:34,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728093863] [2021-12-14 11:45:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:34,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:45:34,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:45:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:45:34,319 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:45:38,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:40,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:41,486 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2021-12-14 11:45:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 11:45:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-14 11:45:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:41,509 INFO L225 Difference]: With dead ends: 7046 [2021-12-14 11:45:41,509 INFO L226 Difference]: Without dead ends: 4021 [2021-12-14 11:45:41,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-14 11:45:41,524 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 2317 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 769 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:41,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2364 Valid, 2288 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1156 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2021-12-14 11:45:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2021-12-14 11:45:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2021-12-14 11:45:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2021-12-14 11:45:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2021-12-14 11:45:41,699 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2021-12-14 11:45:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:41,700 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2021-12-14 11:45:41,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-14 11:45:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2021-12-14 11:45:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 11:45:41,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:41,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:41,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 11:45:41,702 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:41,703 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2021-12-14 11:45:41,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:41,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235413822] [2021-12-14 11:45:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:41,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:41,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-14 11:45:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:41,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:41,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235413822] [2021-12-14 11:45:41,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235413822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:41,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:41,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 11:45:41,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359686014] [2021-12-14 11:45:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:41,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:45:41,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:45:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 11:45:41,941 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 11:45:45,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-14 11:45:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:45:47,103 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2021-12-14 11:45:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 11:45:47,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-12-14 11:45:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:45:47,158 INFO L225 Difference]: With dead ends: 10834 [2021-12-14 11:45:47,158 INFO L226 Difference]: Without dead ends: 7785 [2021-12-14 11:45:47,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-14 11:45:47,178 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 2093 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 707 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 2770 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-14 11:45:47,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2169 Valid, 2770 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1180 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-12-14 11:45:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-12-14 11:45:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2021-12-14 11:45:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2021-12-14 11:45:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2021-12-14 11:45:47,556 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2021-12-14 11:45:47,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:45:47,557 INFO L470 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2021-12-14 11:45:47,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 11:45:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2021-12-14 11:45:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-14 11:45:47,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:45:47,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:45:47,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 11:45:47,560 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:45:47,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:45:47,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2021-12-14 11:45:47,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:45:47,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442885595] [2021-12-14 11:45:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:45:47,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:45:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:47,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 11:45:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:47,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 11:45:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:47,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 11:45:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:47,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 11:45:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:45:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:45:47,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:45:47,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442885595] [2021-12-14 11:45:47,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442885595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:45:47,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:45:47,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 11:45:47,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865955420] [2021-12-14 11:45:47,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:45:47,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 11:45:47,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:45:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 11:45:47,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 11:45:47,908 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4)