./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-simplified/diskperf_simpl1.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:19:01,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:19:01,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:19:01,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:19:01,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:19:01,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:19:01,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:19:01,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:19:01,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:19:01,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:19:01,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:19:01,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:19:01,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:19:01,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:19:01,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:19:01,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:19:01,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:19:01,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:19:01,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:19:01,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:19:01,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:19:01,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:19:01,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:19:01,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:19:01,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:19:01,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:19:01,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:19:01,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:19:01,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:19:01,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:19:01,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:19:01,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:19:01,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:19:01,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:19:01,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:19:01,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:19:01,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:19:01,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:19:01,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:19:01,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:19:01,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:19:01,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:19:01,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:19:01,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:19:01,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:19:01,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:19:01,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:19:01,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:19:01,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:19:01,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:19:01,154 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:19:01,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:19:01,155 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:19:01,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:19:01,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:19:01,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:19:01,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:19:01,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:19:01,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:19:01,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:19:01,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:19:01,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:19:01,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:19:01,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:19:01,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:19:01,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:19:01,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:19:01,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:19:01,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:19:01,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:19:01,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:19:01,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:19:01,159 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:19:01,159 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:19:01,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:19:01,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:19:01,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c [2021-12-21 10:19:01,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:19:01,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:19:01,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:19:01,344 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:19:01,344 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:19:01,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-12-21 10:19:01,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60edc22b2/ac997b195e5a441d94e025c8ef97c3ea/FLAG6c1219de9 [2021-12-21 10:19:01,750 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:19:01,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-12-21 10:19:01,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60edc22b2/ac997b195e5a441d94e025c8ef97c3ea/FLAG6c1219de9 [2021-12-21 10:19:02,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60edc22b2/ac997b195e5a441d94e025c8ef97c3ea [2021-12-21 10:19:02,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:19:02,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:19:02,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:19:02,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:19:02,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:19:02,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e22eeb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02, skipping insertion in model container [2021-12-21 10:19:02,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:19:02,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:19:02,274 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-simplified/diskperf_simpl1.cil.c[2072,2085] [2021-12-21 10:19:02,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:19:02,363 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:19:02,379 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-simplified/diskperf_simpl1.cil.c[2072,2085] [2021-12-21 10:19:02,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:19:02,428 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:19:02,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02 WrapperNode [2021-12-21 10:19:02,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:19:02,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:19:02,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:19:02,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:19:02,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,478 INFO L137 Inliner]: procedures = 38, calls = 66, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 755 [2021-12-21 10:19:02,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:19:02,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:19:02,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:19:02,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:19:02,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:19:02,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:19:02,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:19:02,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:19:02,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (1/1) ... [2021-12-21 10:19:02,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:19:02,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:02,566 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) [2021-12-21 10:19:02,575 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 [2021-12-21 10:19:02,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:19:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-21 10:19:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-21 10:19:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-21 10:19:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-21 10:19:02,602 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-21 10:19:02,602 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-21 10:19:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2021-12-21 10:19:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2021-12-21 10:19:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2021-12-21 10:19:02,604 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2021-12-21 10:19:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-21 10:19:02,605 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-21 10:19:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:19:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-21 10:19:02,605 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-21 10:19:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2021-12-21 10:19:02,605 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2021-12-21 10:19:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2021-12-21 10:19:02,606 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2021-12-21 10:19:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:19:02,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:19:02,761 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:19:02,763 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:19:02,768 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:02,835 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-21 10:19:02,836 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-21 10:19:02,837 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:02,873 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-21 10:19:02,873 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-21 10:19:02,901 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:02,905 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:02,911 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,138 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !false; [2021-12-21 10:19:03,140 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume false; [2021-12-21 10:19:03,140 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2021-12-21 10:19:03,140 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2021-12-21 10:19:03,140 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##106: assume !false; [2021-12-21 10:19:03,140 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##105: assume false; [2021-12-21 10:19:03,141 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:19:03,171 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-21 10:19:03,171 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-21 10:19:03,209 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:19:03,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:19:03,218 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:19:03,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:19:03 BoogieIcfgContainer [2021-12-21 10:19:03,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:19:03,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:19:03,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:19:03,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:19:03,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:19:02" (1/3) ... [2021-12-21 10:19:03,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45068c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:19:03, skipping insertion in model container [2021-12-21 10:19:03,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:19:02" (2/3) ... [2021-12-21 10:19:03,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45068c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:19:03, skipping insertion in model container [2021-12-21 10:19:03,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:19:03" (3/3) ... [2021-12-21 10:19:03,229 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf_simpl1.cil.c [2021-12-21 10:19:03,233 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:19:03,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:19:03,263 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:19:03,267 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 [2021-12-21 10:19:03,267 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:19:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 205 states have internal predecessors, (276), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-21 10:19:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 10:19:03,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:03,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:03,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:03,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1911400740, now seen corresponding path program 1 times [2021-12-21 10:19:03,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:03,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389166205] [2021-12-21 10:19:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:03,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:03,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:03,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389166205] [2021-12-21 10:19:03,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389166205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:03,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:03,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:03,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386004883] [2021-12-21 10:19:03,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:03,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:03,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,473 INFO L87 Difference]: Start difference. First operand has 243 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 205 states have internal predecessors, (276), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:03,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:03,604 INFO L93 Difference]: Finished difference Result 449 states and 690 transitions. [2021-12-21 10:19:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:03,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 10:19:03,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:03,617 INFO L225 Difference]: With dead ends: 449 [2021-12-21 10:19:03,617 INFO L226 Difference]: Without dead ends: 236 [2021-12-21 10:19:03,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,626 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 8 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:03,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 635 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-21 10:19:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-12-21 10:19:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 183 states have (on average 1.4098360655737705) internal successors, (258), 198 states have internal predecessors, (258), 44 states have call successors, (44), 9 states have call predecessors, (44), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-21 10:19:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 332 transitions. [2021-12-21 10:19:03,719 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 332 transitions. Word has length 13 [2021-12-21 10:19:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:03,719 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 332 transitions. [2021-12-21 10:19:03,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 332 transitions. [2021-12-21 10:19:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:19:03,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:03,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:03,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:19:03,722 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:03,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1078790828, now seen corresponding path program 1 times [2021-12-21 10:19:03,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:03,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199024302] [2021-12-21 10:19:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:03,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:03,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:03,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199024302] [2021-12-21 10:19:03,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199024302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:03,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:03,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:03,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726886005] [2021-12-21 10:19:03,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:03,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:03,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:03,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:03,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,804 INFO L87 Difference]: Start difference. First operand 236 states and 332 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:03,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:03,936 INFO L93 Difference]: Finished difference Result 536 states and 777 transitions. [2021-12-21 10:19:03,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:03,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 10:19:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:03,942 INFO L225 Difference]: With dead ends: 536 [2021-12-21 10:19:03,942 INFO L226 Difference]: Without dead ends: 377 [2021-12-21 10:19:03,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:03,946 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 250 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:03,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 680 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-21 10:19:03,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 357. [2021-12-21 10:19:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 283 states have (on average 1.3851590106007068) internal successors, (392), 291 states have internal predecessors, (392), 59 states have call successors, (59), 16 states have call predecessors, (59), 14 states have return successors, (67), 51 states have call predecessors, (67), 48 states have call successors, (67) [2021-12-21 10:19:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 518 transitions. [2021-12-21 10:19:03,979 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 518 transitions. Word has length 15 [2021-12-21 10:19:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:03,980 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 518 transitions. [2021-12-21 10:19:03,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 518 transitions. [2021-12-21 10:19:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 10:19:03,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:03,982 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] [2021-12-21 10:19:03,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:19:03,982 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash -320586800, now seen corresponding path program 1 times [2021-12-21 10:19:03,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:03,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476443556] [2021-12-21 10:19:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:03,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476443556] [2021-12-21 10:19:04,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476443556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:04,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320972637] [2021-12-21 10:19:04,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:04,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,030 INFO L87 Difference]: Start difference. First operand 357 states and 518 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,062 INFO L93 Difference]: Finished difference Result 823 states and 1229 transitions. [2021-12-21 10:19:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:04,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 10:19:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,071 INFO L225 Difference]: With dead ends: 823 [2021-12-21 10:19:04,071 INFO L226 Difference]: Without dead ends: 550 [2021-12-21 10:19:04,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,077 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 255 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 578 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-12-21 10:19:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 519. [2021-12-21 10:19:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 411 states have (on average 1.389294403892944) internal successors, (571), 418 states have internal predecessors, (571), 84 states have call successors, (84), 24 states have call predecessors, (84), 23 states have return successors, (117), 77 states have call predecessors, (117), 74 states have call successors, (117) [2021-12-21 10:19:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 772 transitions. [2021-12-21 10:19:04,126 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 772 transitions. Word has length 20 [2021-12-21 10:19:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,126 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 772 transitions. [2021-12-21 10:19:04,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 772 transitions. [2021-12-21 10:19:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 10:19:04,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,131 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] [2021-12-21 10:19:04,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:19:04,131 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,132 INFO L85 PathProgramCache]: Analyzing trace with hash -175921138, now seen corresponding path program 1 times [2021-12-21 10:19:04,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967240507] [2021-12-21 10:19:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967240507] [2021-12-21 10:19:04,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967240507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:04,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010805014] [2021-12-21 10:19:04,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:04,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,194 INFO L87 Difference]: Start difference. First operand 519 states and 772 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,248 INFO L93 Difference]: Finished difference Result 534 states and 792 transitions. [2021-12-21 10:19:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:04,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-21 10:19:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,252 INFO L225 Difference]: With dead ends: 534 [2021-12-21 10:19:04,252 INFO L226 Difference]: Without dead ends: 530 [2021-12-21 10:19:04,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:04,263 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 21 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 557 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-21 10:19:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 529. [2021-12-21 10:19:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 422 states have (on average 1.386255924170616) internal successors, (585), 427 states have internal predecessors, (585), 83 states have call successors, (83), 25 states have call predecessors, (83), 23 states have return successors, (117), 77 states have call predecessors, (117), 74 states have call successors, (117) [2021-12-21 10:19:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 785 transitions. [2021-12-21 10:19:04,295 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 785 transitions. Word has length 24 [2021-12-21 10:19:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,296 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 785 transitions. [2021-12-21 10:19:04,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 785 transitions. [2021-12-21 10:19:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:19:04,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,301 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] [2021-12-21 10:19:04,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:19:04,301 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1035800982, now seen corresponding path program 1 times [2021-12-21 10:19:04,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220139057] [2021-12-21 10:19:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 10:19:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220139057] [2021-12-21 10:19:04,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220139057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:04,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169145676] [2021-12-21 10:19:04,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:04,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:04,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:04,443 INFO L87 Difference]: Start difference. First operand 529 states and 785 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:04,722 INFO L93 Difference]: Finished difference Result 582 states and 861 transitions. [2021-12-21 10:19:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:04,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-21 10:19:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:04,725 INFO L225 Difference]: With dead ends: 582 [2021-12-21 10:19:04,726 INFO L226 Difference]: Without dead ends: 571 [2021-12-21 10:19:04,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:04,727 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 410 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:04,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 798 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-21 10:19:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2021-12-21 10:19:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 447 states have (on average 1.3803131991051454) internal successors, (617), 454 states have internal predecessors, (617), 83 states have call successors, (83), 25 states have call predecessors, (83), 25 states have return successors, (126), 77 states have call predecessors, (126), 74 states have call successors, (126) [2021-12-21 10:19:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 826 transitions. [2021-12-21 10:19:04,762 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 826 transitions. Word has length 27 [2021-12-21 10:19:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:04,763 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 826 transitions. [2021-12-21 10:19:04,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 826 transitions. [2021-12-21 10:19:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 10:19:04,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:04,764 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] [2021-12-21 10:19:04,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:19:04,764 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1813713707, now seen corresponding path program 1 times [2021-12-21 10:19:04,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:04,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004928574] [2021-12-21 10:19:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:04,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 10:19:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:04,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:04,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:04,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004928574] [2021-12-21 10:19:04,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004928574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:04,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:04,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:04,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208476941] [2021-12-21 10:19:04,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:04,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:04,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:04,822 INFO L87 Difference]: Start difference. First operand 556 states and 826 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,078 INFO L93 Difference]: Finished difference Result 579 states and 854 transitions. [2021-12-21 10:19:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:05,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-21 10:19:05,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,081 INFO L225 Difference]: With dead ends: 579 [2021-12-21 10:19:05,081 INFO L226 Difference]: Without dead ends: 571 [2021-12-21 10:19:05,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:05,082 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 408 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 799 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:05,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-21 10:19:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2021-12-21 10:19:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 447 states have (on average 1.378076062639821) internal successors, (616), 454 states have internal predecessors, (616), 83 states have call successors, (83), 25 states have call predecessors, (83), 25 states have return successors, (126), 77 states have call predecessors, (126), 74 states have call successors, (126) [2021-12-21 10:19:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 825 transitions. [2021-12-21 10:19:05,100 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 825 transitions. Word has length 28 [2021-12-21 10:19:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,101 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 825 transitions. [2021-12-21 10:19:05,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 825 transitions. [2021-12-21 10:19:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:19:05,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,102 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] [2021-12-21 10:19:05,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:19:05,102 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,103 INFO L85 PathProgramCache]: Analyzing trace with hash 123360193, now seen corresponding path program 1 times [2021-12-21 10:19:05,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638212129] [2021-12-21 10:19:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 10:19:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638212129] [2021-12-21 10:19:05,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638212129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:05,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016142904] [2021-12-21 10:19:05,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:05,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:05,125 INFO L87 Difference]: Start difference. First operand 556 states and 825 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,284 INFO L93 Difference]: Finished difference Result 1018 states and 1542 transitions. [2021-12-21 10:19:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-12-21 10:19:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,288 INFO L225 Difference]: With dead ends: 1018 [2021-12-21 10:19:05,288 INFO L226 Difference]: Without dead ends: 989 [2021-12-21 10:19:05,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:05,289 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 417 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 777 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-12-21 10:19:05,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 949. [2021-12-21 10:19:05,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 759 states have (on average 1.391304347826087) internal successors, (1056), 766 states have internal predecessors, (1056), 141 states have call successors, (141), 47 states have call predecessors, (141), 48 states have return successors, (249), 137 states have call predecessors, (249), 132 states have call successors, (249) [2021-12-21 10:19:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1446 transitions. [2021-12-21 10:19:05,336 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1446 transitions. Word has length 29 [2021-12-21 10:19:05,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,337 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1446 transitions. [2021-12-21 10:19:05,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1446 transitions. [2021-12-21 10:19:05,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 10:19:05,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,338 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] [2021-12-21 10:19:05,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:19:05,338 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash -462412845, now seen corresponding path program 1 times [2021-12-21 10:19:05,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139131895] [2021-12-21 10:19:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 10:19:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139131895] [2021-12-21 10:19:05,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139131895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:05,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759597631] [2021-12-21 10:19:05,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:05,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:05,365 INFO L87 Difference]: Start difference. First operand 949 states and 1446 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,500 INFO L93 Difference]: Finished difference Result 985 states and 1494 transitions. [2021-12-21 10:19:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-21 10:19:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,504 INFO L225 Difference]: With dead ends: 985 [2021-12-21 10:19:05,504 INFO L226 Difference]: Without dead ends: 966 [2021-12-21 10:19:05,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:05,505 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 84 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1008 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-21 10:19:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 945. [2021-12-21 10:19:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 756 states have (on average 1.3915343915343916) internal successors, (1052), 763 states have internal predecessors, (1052), 140 states have call successors, (140), 47 states have call predecessors, (140), 48 states have return successors, (248), 136 states have call predecessors, (248), 131 states have call successors, (248) [2021-12-21 10:19:05,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1440 transitions. [2021-12-21 10:19:05,537 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1440 transitions. Word has length 30 [2021-12-21 10:19:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,537 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1440 transitions. [2021-12-21 10:19:05,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1440 transitions. [2021-12-21 10:19:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:19:05,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:19:05,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,539 INFO L85 PathProgramCache]: Analyzing trace with hash 415913558, now seen corresponding path program 1 times [2021-12-21 10:19:05,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236412045] [2021-12-21 10:19:05,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236412045] [2021-12-21 10:19:05,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236412045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:05,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84862876] [2021-12-21 10:19:05,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:05,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:05,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:05,562 INFO L87 Difference]: Start difference. First operand 945 states and 1440 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,582 INFO L93 Difference]: Finished difference Result 1334 states and 2062 transitions. [2021-12-21 10:19:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 10:19:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,584 INFO L225 Difference]: With dead ends: 1334 [2021-12-21 10:19:05,584 INFO L226 Difference]: Without dead ends: 510 [2021-12-21 10:19:05,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:05,590 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 264 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-21 10:19:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-12-21 10:19:05,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 408 states have (on average 1.3553921568627452) internal successors, (553), 414 states have internal predecessors, (553), 78 states have call successors, (78), 23 states have call predecessors, (78), 23 states have return successors, (123), 73 states have call predecessors, (123), 71 states have call successors, (123) [2021-12-21 10:19:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 754 transitions. [2021-12-21 10:19:05,606 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 754 transitions. Word has length 34 [2021-12-21 10:19:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,606 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 754 transitions. [2021-12-21 10:19:05,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 754 transitions. [2021-12-21 10:19:05,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:19:05,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:19:05,608 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2105808494, now seen corresponding path program 1 times [2021-12-21 10:19:05,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060164462] [2021-12-21 10:19:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060164462] [2021-12-21 10:19:05,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060164462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:05,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946560256] [2021-12-21 10:19:05,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:05,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:05,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:05,656 INFO L87 Difference]: Start difference. First operand 510 states and 754 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:05,794 INFO L93 Difference]: Finished difference Result 553 states and 805 transitions. [2021-12-21 10:19:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:05,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-21 10:19:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:05,797 INFO L225 Difference]: With dead ends: 553 [2021-12-21 10:19:05,797 INFO L226 Difference]: Without dead ends: 519 [2021-12-21 10:19:05,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:05,797 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 94 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:05,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1179 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-21 10:19:05,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2021-12-21 10:19:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 407 states have (on average 1.3513513513513513) internal successors, (550), 413 states have internal predecessors, (550), 77 states have call successors, (77), 23 states have call predecessors, (77), 23 states have return successors, (122), 72 states have call predecessors, (122), 70 states have call successors, (122) [2021-12-21 10:19:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 749 transitions. [2021-12-21 10:19:05,813 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 749 transitions. Word has length 34 [2021-12-21 10:19:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:05,813 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 749 transitions. [2021-12-21 10:19:05,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 749 transitions. [2021-12-21 10:19:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:19:05,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:05,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:05,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:19:05,814 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:05,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:05,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1486754927, now seen corresponding path program 1 times [2021-12-21 10:19:05,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:05,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146227277] [2021-12-21 10:19:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:05,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 10:19:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:05,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:05,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146227277] [2021-12-21 10:19:05,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146227277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:05,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:05,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:05,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179780963] [2021-12-21 10:19:05,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:05,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:05,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:05,846 INFO L87 Difference]: Start difference. First operand 508 states and 749 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,084 INFO L93 Difference]: Finished difference Result 720 states and 1102 transitions. [2021-12-21 10:19:06,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:19:06,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-21 10:19:06,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,088 INFO L225 Difference]: With dead ends: 720 [2021-12-21 10:19:06,088 INFO L226 Difference]: Without dead ends: 712 [2021-12-21 10:19:06,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:06,089 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 232 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 668 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:06,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-12-21 10:19:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 566. [2021-12-21 10:19:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 455 states have (on average 1.3516483516483517) internal successors, (615), 461 states have internal predecessors, (615), 84 states have call successors, (84), 25 states have call predecessors, (84), 26 states have return successors, (142), 80 states have call predecessors, (142), 77 states have call successors, (142) [2021-12-21 10:19:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 841 transitions. [2021-12-21 10:19:06,114 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 841 transitions. Word has length 34 [2021-12-21 10:19:06,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,114 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 841 transitions. [2021-12-21 10:19:06,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:06,114 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 841 transitions. [2021-12-21 10:19:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:06,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:19:06,115 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1608594996, now seen corresponding path program 1 times [2021-12-21 10:19:06,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804896823] [2021-12-21 10:19:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 10:19:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804896823] [2021-12-21 10:19:06,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804896823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:06,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980034764] [2021-12-21 10:19:06,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:06,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:06,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:06,160 INFO L87 Difference]: Start difference. First operand 566 states and 841 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,433 INFO L93 Difference]: Finished difference Result 583 states and 860 transitions. [2021-12-21 10:19:06,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:06,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-21 10:19:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,436 INFO L225 Difference]: With dead ends: 583 [2021-12-21 10:19:06,436 INFO L226 Difference]: Without dead ends: 579 [2021-12-21 10:19:06,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:06,437 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 66 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1471 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:06,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-21 10:19:06,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 574. [2021-12-21 10:19:06,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 463 states have (on average 1.349892008639309) internal successors, (625), 469 states have internal predecessors, (625), 84 states have call successors, (84), 25 states have call predecessors, (84), 26 states have return successors, (142), 80 states have call predecessors, (142), 77 states have call successors, (142) [2021-12-21 10:19:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 851 transitions. [2021-12-21 10:19:06,463 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 851 transitions. Word has length 35 [2021-12-21 10:19:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 851 transitions. [2021-12-21 10:19:06,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 851 transitions. [2021-12-21 10:19:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:06,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:19:06,465 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1608318166, now seen corresponding path program 1 times [2021-12-21 10:19:06,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603175055] [2021-12-21 10:19:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 10:19:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603175055] [2021-12-21 10:19:06,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603175055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:06,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373304268] [2021-12-21 10:19:06,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:06,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:06,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:06,517 INFO L87 Difference]: Start difference. First operand 574 states and 851 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,735 INFO L93 Difference]: Finished difference Result 1065 states and 1652 transitions. [2021-12-21 10:19:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-12-21 10:19:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,738 INFO L225 Difference]: With dead ends: 1065 [2021-12-21 10:19:06,738 INFO L226 Difference]: Without dead ends: 605 [2021-12-21 10:19:06,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:06,740 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 75 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1640 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-12-21 10:19:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 586. [2021-12-21 10:19:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 474 states have (on average 1.3544303797468353) internal successors, (642), 481 states have internal predecessors, (642), 84 states have call successors, (84), 25 states have call predecessors, (84), 27 states have return successors, (161), 80 states have call predecessors, (161), 77 states have call successors, (161) [2021-12-21 10:19:06,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 887 transitions. [2021-12-21 10:19:06,762 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 887 transitions. Word has length 35 [2021-12-21 10:19:06,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,762 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 887 transitions. [2021-12-21 10:19:06,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 887 transitions. [2021-12-21 10:19:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:19:06,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 10:19:06,764 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1299938960, now seen corresponding path program 1 times [2021-12-21 10:19:06,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047343118] [2021-12-21 10:19:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047343118] [2021-12-21 10:19:06,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047343118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:06,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26920864] [2021-12-21 10:19:06,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:06,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:06,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:06,784 INFO L87 Difference]: Start difference. First operand 586 states and 887 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:06,878 INFO L93 Difference]: Finished difference Result 610 states and 910 transitions. [2021-12-21 10:19:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:06,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 10:19:06,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:06,880 INFO L225 Difference]: With dead ends: 610 [2021-12-21 10:19:06,880 INFO L226 Difference]: Without dead ends: 582 [2021-12-21 10:19:06,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:06,881 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 270 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:06,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 410 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-12-21 10:19:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 580. [2021-12-21 10:19:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 468 states have (on average 1.3525641025641026) internal successors, (633), 476 states have internal predecessors, (633), 84 states have call successors, (84), 25 states have call predecessors, (84), 27 states have return successors, (159), 79 states have call predecessors, (159), 77 states have call successors, (159) [2021-12-21 10:19:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 876 transitions. [2021-12-21 10:19:06,911 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 876 transitions. Word has length 34 [2021-12-21 10:19:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:06,912 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 876 transitions. [2021-12-21 10:19:06,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:06,912 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 876 transitions. [2021-12-21 10:19:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 10:19:06,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:06,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:06,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:19:06,913 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1171529217, now seen corresponding path program 1 times [2021-12-21 10:19:06,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:06,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587356838] [2021-12-21 10:19:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:06,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 10:19:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:06,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:06,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587356838] [2021-12-21 10:19:06,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587356838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:06,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:06,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:06,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952035969] [2021-12-21 10:19:06,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:06,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:06,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:06,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:06,956 INFO L87 Difference]: Start difference. First operand 580 states and 876 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,341 INFO L93 Difference]: Finished difference Result 738 states and 1149 transitions. [2021-12-21 10:19:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:07,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-12-21 10:19:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,345 INFO L225 Difference]: With dead ends: 738 [2021-12-21 10:19:07,345 INFO L226 Difference]: Without dead ends: 721 [2021-12-21 10:19:07,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:07,346 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 662 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 768 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-21 10:19:07,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 567. [2021-12-21 10:19:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 457 states have (on average 1.3544857768052516) internal successors, (619), 464 states have internal predecessors, (619), 83 states have call successors, (83), 25 states have call predecessors, (83), 26 states have return successors, (140), 78 states have call predecessors, (140), 76 states have call successors, (140) [2021-12-21 10:19:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 842 transitions. [2021-12-21 10:19:07,373 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 842 transitions. Word has length 36 [2021-12-21 10:19:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,373 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 842 transitions. [2021-12-21 10:19:07,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 842 transitions. [2021-12-21 10:19:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 10:19:07,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,374 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] [2021-12-21 10:19:07,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 10:19:07,375 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2056934280, now seen corresponding path program 1 times [2021-12-21 10:19:07,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719800631] [2021-12-21 10:19:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 10:19:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719800631] [2021-12-21 10:19:07,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719800631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:07,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877292958] [2021-12-21 10:19:07,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:07,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:07,405 INFO L87 Difference]: Start difference. First operand 567 states and 842 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,567 INFO L93 Difference]: Finished difference Result 630 states and 904 transitions. [2021-12-21 10:19:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:07,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-12-21 10:19:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,568 INFO L225 Difference]: With dead ends: 630 [2021-12-21 10:19:07,569 INFO L226 Difference]: Without dead ends: 377 [2021-12-21 10:19:07,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:07,570 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 315 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 650 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-21 10:19:07,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2021-12-21 10:19:07,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 295 states have (on average 1.3016949152542372) internal successors, (384), 302 states have internal predecessors, (384), 47 states have call successors, (47), 17 states have call predecessors, (47), 16 states have return successors, (61), 40 states have call predecessors, (61), 40 states have call successors, (61) [2021-12-21 10:19:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 492 transitions. [2021-12-21 10:19:07,605 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 492 transitions. Word has length 39 [2021-12-21 10:19:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,605 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 492 transitions. [2021-12-21 10:19:07,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:07,606 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 492 transitions. [2021-12-21 10:19:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:07,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:07,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:19:07,606 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1922765712, now seen corresponding path program 1 times [2021-12-21 10:19:07,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894003746] [2021-12-21 10:19:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894003746] [2021-12-21 10:19:07,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894003746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:19:07,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747590342] [2021-12-21 10:19:07,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:19:07,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:19:07,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:07,627 INFO L87 Difference]: Start difference. First operand 359 states and 492 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,697 INFO L93 Difference]: Finished difference Result 504 states and 710 transitions. [2021-12-21 10:19:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:19:07,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-21 10:19:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,699 INFO L225 Difference]: With dead ends: 504 [2021-12-21 10:19:07,699 INFO L226 Difference]: Without dead ends: 491 [2021-12-21 10:19:07,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:19:07,700 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 161 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 638 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-21 10:19:07,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 375. [2021-12-21 10:19:07,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 310 states have (on average 1.2903225806451613) internal successors, (400), 317 states have internal predecessors, (400), 47 states have call successors, (47), 17 states have call predecessors, (47), 17 states have return successors, (62), 41 states have call predecessors, (62), 40 states have call successors, (62) [2021-12-21 10:19:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 509 transitions. [2021-12-21 10:19:07,719 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 509 transitions. Word has length 35 [2021-12-21 10:19:07,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,719 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 509 transitions. [2021-12-21 10:19:07,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 509 transitions. [2021-12-21 10:19:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:19:07,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,720 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:07,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 10:19:07,721 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1798212464, now seen corresponding path program 1 times [2021-12-21 10:19:07,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290069668] [2021-12-21 10:19:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290069668] [2021-12-21 10:19:07,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290069668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:07,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733709597] [2021-12-21 10:19:07,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:07,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:07,749 INFO L87 Difference]: Start difference. First operand 375 states and 509 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:07,841 INFO L93 Difference]: Finished difference Result 387 states and 521 transitions. [2021-12-21 10:19:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-21 10:19:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:07,842 INFO L225 Difference]: With dead ends: 387 [2021-12-21 10:19:07,842 INFO L226 Difference]: Without dead ends: 353 [2021-12-21 10:19:07,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:07,843 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 262 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:07,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 411 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:07,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-21 10:19:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2021-12-21 10:19:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 288 states have (on average 1.28125) internal successors, (369), 294 states have internal predecessors, (369), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (61), 40 states have call predecessors, (61), 40 states have call successors, (61) [2021-12-21 10:19:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 476 transitions. [2021-12-21 10:19:07,862 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 476 transitions. Word has length 35 [2021-12-21 10:19:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:07,862 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 476 transitions. [2021-12-21 10:19:07,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 476 transitions. [2021-12-21 10:19:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:19:07,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:07,863 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] [2021-12-21 10:19:07,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 10:19:07,863 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1722219638, now seen corresponding path program 1 times [2021-12-21 10:19:07,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:07,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559009890] [2021-12-21 10:19:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:07,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:07,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:07,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559009890] [2021-12-21 10:19:07,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559009890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:07,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:07,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:07,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705575714] [2021-12-21 10:19:07,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:07,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:07,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:07,903 INFO L87 Difference]: Start difference. First operand 351 states and 476 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:08,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,112 INFO L93 Difference]: Finished difference Result 355 states and 479 transitions. [2021-12-21 10:19:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-12-21 10:19:08,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,114 INFO L225 Difference]: With dead ends: 355 [2021-12-21 10:19:08,114 INFO L226 Difference]: Without dead ends: 324 [2021-12-21 10:19:08,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:08,115 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 60 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1424 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-21 10:19:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-12-21 10:19:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 263 states have (on average 1.2889733840304183) internal successors, (339), 269 states have internal predecessors, (339), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2021-12-21 10:19:08,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 444 transitions. [2021-12-21 10:19:08,130 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 444 transitions. Word has length 37 [2021-12-21 10:19:08,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,130 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 444 transitions. [2021-12-21 10:19:08,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:08,131 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 444 transitions. [2021-12-21 10:19:08,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 10:19:08,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:08,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 10:19:08,131 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash -70447595, now seen corresponding path program 1 times [2021-12-21 10:19:08,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932913381] [2021-12-21 10:19:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932913381] [2021-12-21 10:19:08,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932913381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:08,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259181038] [2021-12-21 10:19:08,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:08,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:08,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:08,190 INFO L87 Difference]: Start difference. First operand 324 states and 444 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,256 INFO L93 Difference]: Finished difference Result 345 states and 466 transitions. [2021-12-21 10:19:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:08,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-21 10:19:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,257 INFO L225 Difference]: With dead ends: 345 [2021-12-21 10:19:08,258 INFO L226 Difference]: Without dead ends: 323 [2021-12-21 10:19:08,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:08,258 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 43 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1424 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-21 10:19:08,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2021-12-21 10:19:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 262 states have (on average 1.286259541984733) internal successors, (337), 268 states have internal predecessors, (337), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2021-12-21 10:19:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 442 transitions. [2021-12-21 10:19:08,274 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 442 transitions. Word has length 36 [2021-12-21 10:19:08,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,274 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 442 transitions. [2021-12-21 10:19:08,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 442 transitions. [2021-12-21 10:19:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 10:19:08,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,275 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] [2021-12-21 10:19:08,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:19:08,275 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2018897985, now seen corresponding path program 1 times [2021-12-21 10:19:08,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328543490] [2021-12-21 10:19:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 10:19:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328543490] [2021-12-21 10:19:08,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328543490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:08,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537345575] [2021-12-21 10:19:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:08,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:08,303 INFO L87 Difference]: Start difference. First operand 323 states and 442 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,408 INFO L93 Difference]: Finished difference Result 352 states and 479 transitions. [2021-12-21 10:19:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-12-21 10:19:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,410 INFO L225 Difference]: With dead ends: 352 [2021-12-21 10:19:08,410 INFO L226 Difference]: Without dead ends: 322 [2021-12-21 10:19:08,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:08,411 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 79 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1079 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-21 10:19:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 308. [2021-12-21 10:19:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 249 states have (on average 1.2931726907630523) internal successors, (322), 255 states have internal predecessors, (322), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-12-21 10:19:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 425 transitions. [2021-12-21 10:19:08,426 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 425 transitions. Word has length 38 [2021-12-21 10:19:08,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,426 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 425 transitions. [2021-12-21 10:19:08,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 425 transitions. [2021-12-21 10:19:08,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:19:08,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,427 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] [2021-12-21 10:19:08,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 10:19:08,427 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash 233678808, now seen corresponding path program 1 times [2021-12-21 10:19:08,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098211834] [2021-12-21 10:19:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098211834] [2021-12-21 10:19:08,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098211834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:19:08,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803713205] [2021-12-21 10:19:08,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:08,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:08,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:08,467 INFO L87 Difference]: Start difference. First operand 308 states and 425 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,545 INFO L93 Difference]: Finished difference Result 323 states and 441 transitions. [2021-12-21 10:19:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 10:19:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,548 INFO L225 Difference]: With dead ends: 323 [2021-12-21 10:19:08,548 INFO L226 Difference]: Without dead ends: 319 [2021-12-21 10:19:08,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:08,549 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 46 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1090 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-21 10:19:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 315. [2021-12-21 10:19:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 256 states have (on average 1.2890625) internal successors, (330), 262 states have internal predecessors, (330), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-12-21 10:19:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 433 transitions. [2021-12-21 10:19:08,575 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 433 transitions. Word has length 37 [2021-12-21 10:19:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,575 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 433 transitions. [2021-12-21 10:19:08,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 433 transitions. [2021-12-21 10:19:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:19:08,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,576 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] [2021-12-21 10:19:08,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 10:19:08,576 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 233401978, now seen corresponding path program 1 times [2021-12-21 10:19:08,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897435783] [2021-12-21 10:19:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897435783] [2021-12-21 10:19:08,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897435783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:19:08,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340736924] [2021-12-21 10:19:08,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:19:08,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:19:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:19:08,608 INFO L87 Difference]: Start difference. First operand 315 states and 433 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:08,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,777 INFO L93 Difference]: Finished difference Result 431 states and 618 transitions. [2021-12-21 10:19:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:19:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 10:19:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,780 INFO L225 Difference]: With dead ends: 431 [2021-12-21 10:19:08,780 INFO L226 Difference]: Without dead ends: 402 [2021-12-21 10:19:08,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:08,781 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 345 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 501 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-21 10:19:08,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-12-21 10:19:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 233 states have (on average 1.3004291845493563) internal successors, (303), 239 states have internal predecessors, (303), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-12-21 10:19:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2021-12-21 10:19:08,800 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 37 [2021-12-21 10:19:08,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,800 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2021-12-21 10:19:08,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:08,800 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2021-12-21 10:19:08,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:19:08,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,801 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] [2021-12-21 10:19:08,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:19:08,801 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1150124824, now seen corresponding path program 1 times [2021-12-21 10:19:08,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178745298] [2021-12-21 10:19:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 10:19:08,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 10:19:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:08,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:08,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178745298] [2021-12-21 10:19:08,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178745298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:08,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:08,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:08,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725016323] [2021-12-21 10:19:08,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:08,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:08,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:08,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:08,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:08,832 INFO L87 Difference]: Start difference. First operand 292 states and 406 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:08,952 INFO L93 Difference]: Finished difference Result 544 states and 787 transitions. [2021-12-21 10:19:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:08,952 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), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-21 10:19:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:08,954 INFO L225 Difference]: With dead ends: 544 [2021-12-21 10:19:08,954 INFO L226 Difference]: Without dead ends: 310 [2021-12-21 10:19:08,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:08,955 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 112 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:08,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 639 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-21 10:19:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 302. [2021-12-21 10:19:08,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 243 states have (on average 1.3045267489711934) internal successors, (317), 248 states have internal predecessors, (317), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-12-21 10:19:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 420 transitions. [2021-12-21 10:19:08,986 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 420 transitions. Word has length 43 [2021-12-21 10:19:08,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:08,986 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 420 transitions. [2021-12-21 10:19:08,986 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), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 420 transitions. [2021-12-21 10:19:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-21 10:19:08,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:08,988 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] [2021-12-21 10:19:08,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 10:19:08,988 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:08,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1967801604, now seen corresponding path program 1 times [2021-12-21 10:19:08,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:08,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006838989] [2021-12-21 10:19:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:08,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 10:19:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:09,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006838989] [2021-12-21 10:19:09,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006838989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:09,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:09,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 10:19:09,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419377874] [2021-12-21 10:19:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:09,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:19:09,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:19:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:09,109 INFO L87 Difference]: Start difference. First operand 302 states and 420 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:09,461 INFO L93 Difference]: Finished difference Result 333 states and 468 transitions. [2021-12-21 10:19:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:19:09,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-12-21 10:19:09,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:09,463 INFO L225 Difference]: With dead ends: 333 [2021-12-21 10:19:09,463 INFO L226 Difference]: Without dead ends: 310 [2021-12-21 10:19:09,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:19:09,464 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 77 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:09,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1287 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-21 10:19:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 301. [2021-12-21 10:19:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 242 states have (on average 1.3016528925619835) internal successors, (315), 247 states have internal predecessors, (315), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2021-12-21 10:19:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 418 transitions. [2021-12-21 10:19:09,498 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 418 transitions. Word has length 43 [2021-12-21 10:19:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:09,498 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 418 transitions. [2021-12-21 10:19:09,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 418 transitions. [2021-12-21 10:19:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-21 10:19:09,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:09,499 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] [2021-12-21 10:19:09,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 10:19:09,499 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:09,499 INFO L85 PathProgramCache]: Analyzing trace with hash -896869873, now seen corresponding path program 1 times [2021-12-21 10:19:09,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:09,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90199123] [2021-12-21 10:19:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:09,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 10:19:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:09,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:09,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90199123] [2021-12-21 10:19:09,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90199123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:09,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:09,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 10:19:09,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895890237] [2021-12-21 10:19:09,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:09,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:19:09,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:09,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:19:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:19:09,586 INFO L87 Difference]: Start difference. First operand 301 states and 418 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:09,746 INFO L93 Difference]: Finished difference Result 569 states and 825 transitions. [2021-12-21 10:19:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:19:09,747 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-21 10:19:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:09,748 INFO L225 Difference]: With dead ends: 569 [2021-12-21 10:19:09,748 INFO L226 Difference]: Without dead ends: 326 [2021-12-21 10:19:09,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:09,750 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 61 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:09,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1194 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-21 10:19:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 313. [2021-12-21 10:19:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 252 states have (on average 1.2936507936507937) internal successors, (326), 257 states have internal predecessors, (326), 44 states have call successors, (44), 15 states have call predecessors, (44), 16 states have return successors, (77), 40 states have call predecessors, (77), 38 states have call successors, (77) [2021-12-21 10:19:09,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 447 transitions. [2021-12-21 10:19:09,770 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 447 transitions. Word has length 48 [2021-12-21 10:19:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:09,770 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 447 transitions. [2021-12-21 10:19:09,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 447 transitions. [2021-12-21 10:19:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 10:19:09,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:09,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:09,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 10:19:09,771 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1018197871, now seen corresponding path program 1 times [2021-12-21 10:19:09,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:09,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139497100] [2021-12-21 10:19:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:09,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 10:19:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:09,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:09,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139497100] [2021-12-21 10:19:09,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139497100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:09,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:09,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:09,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708034946] [2021-12-21 10:19:09,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:09,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:09,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:09,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:09,845 INFO L87 Difference]: Start difference. First operand 313 states and 447 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:10,102 INFO L93 Difference]: Finished difference Result 315 states and 448 transitions. [2021-12-21 10:19:10,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:10,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-21 10:19:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:10,104 INFO L225 Difference]: With dead ends: 315 [2021-12-21 10:19:10,104 INFO L226 Difference]: Without dead ends: 282 [2021-12-21 10:19:10,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:19:10,105 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 66 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:10,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1244 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:10,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-21 10:19:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2021-12-21 10:19:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 224 states have (on average 1.3169642857142858) internal successors, (295), 228 states have internal predecessors, (295), 42 states have call successors, (42), 14 states have call predecessors, (42), 15 states have return successors, (76), 39 states have call predecessors, (76), 37 states have call successors, (76) [2021-12-21 10:19:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 413 transitions. [2021-12-21 10:19:10,121 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 413 transitions. Word has length 44 [2021-12-21 10:19:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:10,121 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 413 transitions. [2021-12-21 10:19:10,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:19:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 413 transitions. [2021-12-21 10:19:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 10:19:10,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:10,125 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:10,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 10:19:10,126 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:10,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1224484534, now seen corresponding path program 1 times [2021-12-21 10:19:10,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:10,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756980483] [2021-12-21 10:19:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:10,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 10:19:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:10,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756980483] [2021-12-21 10:19:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756980483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:10,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:10,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:10,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513237109] [2021-12-21 10:19:10,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:10,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:10,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:10,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:10,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:10,167 INFO L87 Difference]: Start difference. First operand 282 states and 413 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 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) [2021-12-21 10:19:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:10,341 INFO L93 Difference]: Finished difference Result 441 states and 673 transitions. [2021-12-21 10:19:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:10,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 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 49 [2021-12-21 10:19:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:10,343 INFO L225 Difference]: With dead ends: 441 [2021-12-21 10:19:10,344 INFO L226 Difference]: Without dead ends: 438 [2021-12-21 10:19:10,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:19:10,344 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 140 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:10,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 796 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-21 10:19:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2021-12-21 10:19:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 228 states have (on average 1.3201754385964912) internal successors, (301), 232 states have internal predecessors, (301), 42 states have call successors, (42), 14 states have call predecessors, (42), 15 states have return successors, (76), 39 states have call predecessors, (76), 37 states have call successors, (76) [2021-12-21 10:19:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 419 transitions. [2021-12-21 10:19:10,362 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 419 transitions. Word has length 49 [2021-12-21 10:19:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:10,363 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 419 transitions. [2021-12-21 10:19:10,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 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) [2021-12-21 10:19:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 419 transitions. [2021-12-21 10:19:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 10:19:10,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:10,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:10,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 10:19:10,364 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:10,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2015471348, now seen corresponding path program 1 times [2021-12-21 10:19:10,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676955594] [2021-12-21 10:19:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:10,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 10:19:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:10,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:10,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676955594] [2021-12-21 10:19:10,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676955594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:10,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:10,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 10:19:10,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311596378] [2021-12-21 10:19:10,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:10,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 10:19:10,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 10:19:10,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:19:10,409 INFO L87 Difference]: Start difference. First operand 286 states and 419 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:10,584 INFO L93 Difference]: Finished difference Result 658 states and 979 transitions. [2021-12-21 10:19:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 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 49 [2021-12-21 10:19:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:10,586 INFO L225 Difference]: With dead ends: 658 [2021-12-21 10:19:10,586 INFO L226 Difference]: Without dead ends: 405 [2021-12-21 10:19:10,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:10,588 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 214 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:10,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 543 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-21 10:19:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 373. [2021-12-21 10:19:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 297 states have (on average 1.2996632996632997) internal successors, (386), 302 states have internal predecessors, (386), 53 states have call successors, (53), 18 states have call predecessors, (53), 22 states have return successors, (96), 52 states have call predecessors, (96), 49 states have call successors, (96) [2021-12-21 10:19:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 535 transitions. [2021-12-21 10:19:10,608 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 535 transitions. Word has length 49 [2021-12-21 10:19:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:10,608 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 535 transitions. [2021-12-21 10:19:10,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 10:19:10,609 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 535 transitions. [2021-12-21 10:19:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 10:19:10,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:10,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:10,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-21 10:19:10,610 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:10,610 INFO L85 PathProgramCache]: Analyzing trace with hash -726473774, now seen corresponding path program 1 times [2021-12-21 10:19:10,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:10,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833291122] [2021-12-21 10:19:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:10,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:10,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:10,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833291122] [2021-12-21 10:19:10,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833291122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:10,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:10,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:10,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052946139] [2021-12-21 10:19:10,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:10,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:10,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:10,733 INFO L87 Difference]: Start difference. First operand 373 states and 535 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 10:19:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:10,908 INFO L93 Difference]: Finished difference Result 691 states and 1016 transitions. [2021-12-21 10:19:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:19:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2021-12-21 10:19:10,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:10,910 INFO L225 Difference]: With dead ends: 691 [2021-12-21 10:19:10,910 INFO L226 Difference]: Without dead ends: 346 [2021-12-21 10:19:10,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:10,912 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 88 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:10,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1044 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-12-21 10:19:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2021-12-21 10:19:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 271 states have (on average 1.2767527675276753) internal successors, (346), 275 states have internal predecessors, (346), 52 states have call successors, (52), 18 states have call predecessors, (52), 22 states have return successors, (96), 52 states have call predecessors, (96), 49 states have call successors, (96) [2021-12-21 10:19:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 494 transitions. [2021-12-21 10:19:10,951 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 494 transitions. Word has length 50 [2021-12-21 10:19:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:10,952 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 494 transitions. [2021-12-21 10:19:10,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 10:19:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 494 transitions. [2021-12-21 10:19:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 10:19:10,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:10,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:10,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 10:19:10,953 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1339562411, now seen corresponding path program 1 times [2021-12-21 10:19:10,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:10,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992067289] [2021-12-21 10:19:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:10,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:10,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:11,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:11,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992067289] [2021-12-21 10:19:11,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992067289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:11,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:11,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 10:19:11,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695592394] [2021-12-21 10:19:11,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:11,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:19:11,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:11,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:19:11,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:11,038 INFO L87 Difference]: Start difference. First operand 346 states and 494 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:19:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:11,395 INFO L93 Difference]: Finished difference Result 659 states and 959 transitions. [2021-12-21 10:19:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:11,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2021-12-21 10:19:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:11,397 INFO L225 Difference]: With dead ends: 659 [2021-12-21 10:19:11,397 INFO L226 Difference]: Without dead ends: 341 [2021-12-21 10:19:11,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:19:11,399 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 232 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:11,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 841 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-21 10:19:11,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2021-12-21 10:19:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 267 states have (on average 1.2659176029962547) internal successors, (338), 271 states have internal predecessors, (338), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2021-12-21 10:19:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 481 transitions. [2021-12-21 10:19:11,422 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 481 transitions. Word has length 54 [2021-12-21 10:19:11,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:11,423 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 481 transitions. [2021-12-21 10:19:11,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 10:19:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 481 transitions. [2021-12-21 10:19:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:19:11,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:11,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:11,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-21 10:19:11,424 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:11,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:11,425 INFO L85 PathProgramCache]: Analyzing trace with hash 330640549, now seen corresponding path program 1 times [2021-12-21 10:19:11,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:11,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936739220] [2021-12-21 10:19:11,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:11,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:11,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:11,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936739220] [2021-12-21 10:19:11,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936739220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:11,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:11,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 10:19:11,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639195919] [2021-12-21 10:19:11,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:11,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:19:11,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:19:11,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:11,487 INFO L87 Difference]: Start difference. First operand 341 states and 481 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 10:19:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:11,652 INFO L93 Difference]: Finished difference Result 666 states and 963 transitions. [2021-12-21 10:19:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 10:19:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-12-21 10:19:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:11,654 INFO L225 Difference]: With dead ends: 666 [2021-12-21 10:19:11,654 INFO L226 Difference]: Without dead ends: 353 [2021-12-21 10:19:11,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:19:11,656 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 51 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:11,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 703 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:19:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-21 10:19:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2021-12-21 10:19:11,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 270 states have (on average 1.262962962962963) internal successors, (341), 274 states have internal predecessors, (341), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2021-12-21 10:19:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 484 transitions. [2021-12-21 10:19:11,676 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 484 transitions. Word has length 57 [2021-12-21 10:19:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:11,676 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 484 transitions. [2021-12-21 10:19:11,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 10:19:11,676 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 484 transitions. [2021-12-21 10:19:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:19:11,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:11,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:11,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-21 10:19:11,677 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:11,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:11,677 INFO L85 PathProgramCache]: Analyzing trace with hash 942519397, now seen corresponding path program 1 times [2021-12-21 10:19:11,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:11,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428197438] [2021-12-21 10:19:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:11,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:11,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:11,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428197438] [2021-12-21 10:19:11,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428197438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:11,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:11,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 10:19:11,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737480] [2021-12-21 10:19:11,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:11,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:19:11,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:19:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:19:11,826 INFO L87 Difference]: Start difference. First operand 344 states and 484 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 10:19:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:12,079 INFO L93 Difference]: Finished difference Result 662 states and 947 transitions. [2021-12-21 10:19:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:19:12,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2021-12-21 10:19:12,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:12,081 INFO L225 Difference]: With dead ends: 662 [2021-12-21 10:19:12,081 INFO L226 Difference]: Without dead ends: 347 [2021-12-21 10:19:12,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:12,083 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 46 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:12,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1353 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-21 10:19:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2021-12-21 10:19:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 270 states have (on average 1.2518518518518518) internal successors, (338), 274 states have internal predecessors, (338), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2021-12-21 10:19:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2021-12-21 10:19:12,102 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 57 [2021-12-21 10:19:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:12,103 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2021-12-21 10:19:12,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 10:19:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2021-12-21 10:19:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 10:19:12,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:12,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:12,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-21 10:19:12,104 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:12,104 INFO L85 PathProgramCache]: Analyzing trace with hash -146309345, now seen corresponding path program 1 times [2021-12-21 10:19:12,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:12,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596844813] [2021-12-21 10:19:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:12,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:12,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:12,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596844813] [2021-12-21 10:19:12,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596844813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:12,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:12,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 10:19:12,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117770278] [2021-12-21 10:19:12,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:12,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:19:12,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:12,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:19:12,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:19:12,175 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:19:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:12,509 INFO L93 Difference]: Finished difference Result 623 states and 870 transitions. [2021-12-21 10:19:12,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2021-12-21 10:19:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:12,511 INFO L225 Difference]: With dead ends: 623 [2021-12-21 10:19:12,511 INFO L226 Difference]: Without dead ends: 322 [2021-12-21 10:19:12,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:19:12,512 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 165 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:12,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1240 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-21 10:19:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 314. [2021-12-21 10:19:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 246 states have (on average 1.2560975609756098) internal successors, (309), 252 states have internal predecessors, (309), 49 states have call successors, (49), 18 states have call predecessors, (49), 18 states have return successors, (70), 43 states have call predecessors, (70), 46 states have call successors, (70) [2021-12-21 10:19:12,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 428 transitions. [2021-12-21 10:19:12,529 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 428 transitions. Word has length 68 [2021-12-21 10:19:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:12,530 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 428 transitions. [2021-12-21 10:19:12,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:19:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 428 transitions. [2021-12-21 10:19:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 10:19:12,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:12,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:12,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-21 10:19:12,531 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1989043251, now seen corresponding path program 1 times [2021-12-21 10:19:12,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473824340] [2021-12-21 10:19:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:12,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 10:19:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:12,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:12,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473824340] [2021-12-21 10:19:12,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473824340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:12,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:12,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-21 10:19:12,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686338221] [2021-12-21 10:19:12,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:12,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:19:12,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:12,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:19:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:19:12,688 INFO L87 Difference]: Start difference. First operand 314 states and 428 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:19:13,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:13,039 INFO L93 Difference]: Finished difference Result 350 states and 477 transitions. [2021-12-21 10:19:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 10:19:13,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2021-12-21 10:19:13,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:13,041 INFO L225 Difference]: With dead ends: 350 [2021-12-21 10:19:13,041 INFO L226 Difference]: Without dead ends: 329 [2021-12-21 10:19:13,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:13,042 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 126 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:13,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 2250 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-21 10:19:13,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 317. [2021-12-21 10:19:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 248 states have (on average 1.2540322580645162) internal successors, (311), 255 states have internal predecessors, (311), 49 states have call successors, (49), 18 states have call predecessors, (49), 19 states have return successors, (71), 43 states have call predecessors, (71), 46 states have call successors, (71) [2021-12-21 10:19:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 431 transitions. [2021-12-21 10:19:13,061 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 431 transitions. Word has length 73 [2021-12-21 10:19:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:13,061 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 431 transitions. [2021-12-21 10:19:13,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:19:13,062 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 431 transitions. [2021-12-21 10:19:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 10:19:13,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:13,062 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:13,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-21 10:19:13,063 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash -182846632, now seen corresponding path program 1 times [2021-12-21 10:19:13,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:13,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89090920] [2021-12-21 10:19:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:13,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 10:19:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:13,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:13,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89090920] [2021-12-21 10:19:13,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89090920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:13,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:13,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-21 10:19:13,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855313592] [2021-12-21 10:19:13,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:13,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:19:13,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:19:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:19:13,218 INFO L87 Difference]: Start difference. First operand 317 states and 431 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:19:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:13,596 INFO L93 Difference]: Finished difference Result 354 states and 481 transitions. [2021-12-21 10:19:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 10:19:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 74 [2021-12-21 10:19:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:13,599 INFO L225 Difference]: With dead ends: 354 [2021-12-21 10:19:13,599 INFO L226 Difference]: Without dead ends: 333 [2021-12-21 10:19:13,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:13,600 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 126 mSDsluCounter, 2354 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:13,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2563 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-21 10:19:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 317. [2021-12-21 10:19:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 248 states have (on average 1.2540322580645162) internal successors, (311), 255 states have internal predecessors, (311), 49 states have call successors, (49), 18 states have call predecessors, (49), 19 states have return successors, (71), 43 states have call predecessors, (71), 46 states have call successors, (71) [2021-12-21 10:19:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 431 transitions. [2021-12-21 10:19:13,626 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 431 transitions. Word has length 74 [2021-12-21 10:19:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:13,627 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 431 transitions. [2021-12-21 10:19:13,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 10:19:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 431 transitions. [2021-12-21 10:19:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 10:19:13,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:13,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:13,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-21 10:19:13,628 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash -673237615, now seen corresponding path program 1 times [2021-12-21 10:19:13,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:13,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965388674] [2021-12-21 10:19:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:13,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 10:19:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-21 10:19:13,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:13,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:13,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965388674] [2021-12-21 10:19:13,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965388674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:13,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:13,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-21 10:19:13,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778845355] [2021-12-21 10:19:13,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:13,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 10:19:13,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 10:19:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:19:13,872 INFO L87 Difference]: Start difference. First operand 317 states and 431 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:19:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:14,657 INFO L93 Difference]: Finished difference Result 468 states and 698 transitions. [2021-12-21 10:19:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 10:19:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2021-12-21 10:19:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:14,659 INFO L225 Difference]: With dead ends: 468 [2021-12-21 10:19:14,659 INFO L226 Difference]: Without dead ends: 429 [2021-12-21 10:19:14,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-12-21 10:19:14,660 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 194 mSDsluCounter, 2809 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:14,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 3052 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-12-21 10:19:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 413. [2021-12-21 10:19:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 316 states have (on average 1.2626582278481013) internal successors, (399), 327 states have internal predecessors, (399), 76 states have call successors, (76), 18 states have call predecessors, (76), 20 states have return successors, (110), 67 states have call predecessors, (110), 72 states have call successors, (110) [2021-12-21 10:19:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 585 transitions. [2021-12-21 10:19:14,684 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 585 transitions. Word has length 82 [2021-12-21 10:19:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:14,684 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 585 transitions. [2021-12-21 10:19:14,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:19:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 585 transitions. [2021-12-21 10:19:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 10:19:14,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:14,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:14,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-21 10:19:14,685 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash -166689667, now seen corresponding path program 1 times [2021-12-21 10:19:14,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384725347] [2021-12-21 10:19:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:14,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 10:19:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:14,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:14,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384725347] [2021-12-21 10:19:14,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384725347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:14,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:14,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:14,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240875149] [2021-12-21 10:19:14,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:14,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:14,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:14,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:14,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:14,776 INFO L87 Difference]: Start difference. First operand 413 states and 585 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-21 10:19:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:15,125 INFO L93 Difference]: Finished difference Result 809 states and 1103 transitions. [2021-12-21 10:19:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:19:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 84 [2021-12-21 10:19:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:15,128 INFO L225 Difference]: With dead ends: 809 [2021-12-21 10:19:15,129 INFO L226 Difference]: Without dead ends: 538 [2021-12-21 10:19:15,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:19:15,130 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 377 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:15,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 1086 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-12-21 10:19:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 496. [2021-12-21 10:19:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 387 states have (on average 1.2532299741602067) internal successors, (485), 397 states have internal predecessors, (485), 79 states have call successors, (79), 25 states have call predecessors, (79), 29 states have return successors, (114), 73 states have call predecessors, (114), 75 states have call successors, (114) [2021-12-21 10:19:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 678 transitions. [2021-12-21 10:19:15,158 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 678 transitions. Word has length 84 [2021-12-21 10:19:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:15,158 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 678 transitions. [2021-12-21 10:19:15,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-21 10:19:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 678 transitions. [2021-12-21 10:19:15,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 10:19:15,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:15,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:15,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-21 10:19:15,160 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:15,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1602435204, now seen corresponding path program 1 times [2021-12-21 10:19:15,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:15,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530572997] [2021-12-21 10:19:15,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:15,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 10:19:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:15,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:15,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530572997] [2021-12-21 10:19:15,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530572997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:15,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:15,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:15,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120334945] [2021-12-21 10:19:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:15,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:15,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:15,277 INFO L87 Difference]: Start difference. First operand 496 states and 678 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-21 10:19:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:15,701 INFO L93 Difference]: Finished difference Result 867 states and 1198 transitions. [2021-12-21 10:19:15,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 10:19:15,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 84 [2021-12-21 10:19:15,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:15,703 INFO L225 Difference]: With dead ends: 867 [2021-12-21 10:19:15,703 INFO L226 Difference]: Without dead ends: 496 [2021-12-21 10:19:15,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-21 10:19:15,705 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 447 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:15,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 713 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-21 10:19:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2021-12-21 10:19:15,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 387 states have (on average 1.248062015503876) internal successors, (483), 397 states have internal predecessors, (483), 79 states have call successors, (79), 25 states have call predecessors, (79), 29 states have return successors, (106), 73 states have call predecessors, (106), 75 states have call successors, (106) [2021-12-21 10:19:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 668 transitions. [2021-12-21 10:19:15,757 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 668 transitions. Word has length 84 [2021-12-21 10:19:15,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:15,757 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 668 transitions. [2021-12-21 10:19:15,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-21 10:19:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 668 transitions. [2021-12-21 10:19:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-21 10:19:15,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:15,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:15,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-21 10:19:15,758 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:15,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash 716383564, now seen corresponding path program 1 times [2021-12-21 10:19:15,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:15,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264882294] [2021-12-21 10:19:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:15,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 10:19:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 10:19:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:15,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:15,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264882294] [2021-12-21 10:19:15,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264882294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:15,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:15,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-21 10:19:15,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126608847] [2021-12-21 10:19:15,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:15,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 10:19:15,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 10:19:15,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:19:15,955 INFO L87 Difference]: Start difference. First operand 496 states and 668 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:19:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:16,532 INFO L93 Difference]: Finished difference Result 657 states and 955 transitions. [2021-12-21 10:19:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 10:19:16,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2021-12-21 10:19:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:16,535 INFO L225 Difference]: With dead ends: 657 [2021-12-21 10:19:16,535 INFO L226 Difference]: Without dead ends: 610 [2021-12-21 10:19:16,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-12-21 10:19:16,536 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 249 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:16,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 2791 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-21 10:19:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 493. [2021-12-21 10:19:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 385 states have (on average 1.2493506493506494) internal successors, (481), 394 states have internal predecessors, (481), 79 states have call successors, (79), 25 states have call predecessors, (79), 28 states have return successors, (105), 73 states have call predecessors, (105), 75 states have call successors, (105) [2021-12-21 10:19:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 665 transitions. [2021-12-21 10:19:16,609 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 665 transitions. Word has length 83 [2021-12-21 10:19:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:16,609 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 665 transitions. [2021-12-21 10:19:16,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 11 states have internal predecessors, (70), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 10:19:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 665 transitions. [2021-12-21 10:19:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 10:19:16,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:16,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:16,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-21 10:19:16,611 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash 971177342, now seen corresponding path program 1 times [2021-12-21 10:19:16,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:16,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816052702] [2021-12-21 10:19:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:16,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 10:19:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:16,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:16,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816052702] [2021-12-21 10:19:16,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816052702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:16,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:16,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-21 10:19:16,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832289668] [2021-12-21 10:19:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:16,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 10:19:16,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 10:19:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:16,763 INFO L87 Difference]: Start difference. First operand 493 states and 665 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 10:19:17,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:17,375 INFO L93 Difference]: Finished difference Result 957 states and 1298 transitions. [2021-12-21 10:19:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 10:19:17,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-12-21 10:19:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:17,379 INFO L225 Difference]: With dead ends: 957 [2021-12-21 10:19:17,379 INFO L226 Difference]: Without dead ends: 931 [2021-12-21 10:19:17,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-12-21 10:19:17,380 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 348 mSDsluCounter, 2088 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:17,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 2308 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-12-21 10:19:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 585. [2021-12-21 10:19:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 461 states have (on average 1.2190889370932756) internal successors, (562), 473 states have internal predecessors, (562), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (115), 80 states have call predecessors, (115), 81 states have call successors, (115) [2021-12-21 10:19:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 762 transitions. [2021-12-21 10:19:17,418 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 762 transitions. Word has length 84 [2021-12-21 10:19:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:17,418 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 762 transitions. [2021-12-21 10:19:17,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 10:19:17,419 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 762 transitions. [2021-12-21 10:19:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 10:19:17,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:17,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:17,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-21 10:19:17,420 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:17,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash -171325124, now seen corresponding path program 1 times [2021-12-21 10:19:17,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:17,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437521018] [2021-12-21 10:19:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:17,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 10:19:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 10:19:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:17,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:17,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437521018] [2021-12-21 10:19:17,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437521018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:17,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:17,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-21 10:19:17,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543395666] [2021-12-21 10:19:17,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:17,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 10:19:17,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:17,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 10:19:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:17,562 INFO L87 Difference]: Start difference. First operand 585 states and 762 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 10:19:18,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:18,171 INFO L93 Difference]: Finished difference Result 952 states and 1287 transitions. [2021-12-21 10:19:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 10:19:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2021-12-21 10:19:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:18,176 INFO L225 Difference]: With dead ends: 952 [2021-12-21 10:19:18,176 INFO L226 Difference]: Without dead ends: 918 [2021-12-21 10:19:18,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-12-21 10:19:18,177 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 273 mSDsluCounter, 3047 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:18,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 3394 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:19:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-12-21 10:19:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 468. [2021-12-21 10:19:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 366 states have (on average 1.2486338797814207) internal successors, (457), 375 states have internal predecessors, (457), 75 states have call successors, (75), 23 states have call predecessors, (75), 26 states have return successors, (100), 69 states have call predecessors, (100), 71 states have call successors, (100) [2021-12-21 10:19:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 632 transitions. [2021-12-21 10:19:18,218 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 632 transitions. Word has length 84 [2021-12-21 10:19:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:18,218 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 632 transitions. [2021-12-21 10:19:18,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-21 10:19:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 632 transitions. [2021-12-21 10:19:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 10:19:18,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:18,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:18,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-21 10:19:18,220 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1715684878, now seen corresponding path program 1 times [2021-12-21 10:19:18,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:18,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618753791] [2021-12-21 10:19:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:18,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 10:19:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 10:19:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:18,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618753791] [2021-12-21 10:19:18,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618753791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:18,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:18,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-21 10:19:18,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620619942] [2021-12-21 10:19:18,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:18,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:19:18,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:19:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:19:18,379 INFO L87 Difference]: Start difference. First operand 468 states and 632 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 10:19:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:19,288 INFO L93 Difference]: Finished difference Result 932 states and 1258 transitions. [2021-12-21 10:19:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 10:19:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-12-21 10:19:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:19,301 INFO L225 Difference]: With dead ends: 932 [2021-12-21 10:19:19,302 INFO L226 Difference]: Without dead ends: 885 [2021-12-21 10:19:19,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 10:19:19,309 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 531 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 2367 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:19,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 2367 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:19:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-12-21 10:19:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 858. [2021-12-21 10:19:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 666 states have (on average 1.2147147147147148) internal successors, (809), 684 states have internal predecessors, (809), 142 states have call successors, (142), 43 states have call predecessors, (142), 49 states have return successors, (185), 130 states have call predecessors, (185), 137 states have call successors, (185) [2021-12-21 10:19:19,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1136 transitions. [2021-12-21 10:19:19,454 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1136 transitions. Word has length 93 [2021-12-21 10:19:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:19,455 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1136 transitions. [2021-12-21 10:19:19,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 10:19:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1136 transitions. [2021-12-21 10:19:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 10:19:19,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:19,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:19,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-21 10:19:19,458 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:19,459 INFO L85 PathProgramCache]: Analyzing trace with hash 327002288, now seen corresponding path program 1 times [2021-12-21 10:19:19,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:19,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009417004] [2021-12-21 10:19:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:19,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 10:19:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 10:19:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:19:19,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:19,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009417004] [2021-12-21 10:19:19,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009417004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:19,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:19,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:19,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217763795] [2021-12-21 10:19:19,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:19,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:19,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:19,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:19,556 INFO L87 Difference]: Start difference. First operand 858 states and 1136 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 10:19:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:19,931 INFO L93 Difference]: Finished difference Result 1692 states and 2335 transitions. [2021-12-21 10:19:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 95 [2021-12-21 10:19:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:19,936 INFO L225 Difference]: With dead ends: 1692 [2021-12-21 10:19:19,936 INFO L226 Difference]: Without dead ends: 1142 [2021-12-21 10:19:19,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:19,938 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 158 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:19,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 1513 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:19:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-12-21 10:19:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 834. [2021-12-21 10:19:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 650 states have (on average 1.1953846153846155) internal successors, (777), 664 states have internal predecessors, (777), 134 states have call successors, (134), 43 states have call predecessors, (134), 49 states have return successors, (173), 126 states have call predecessors, (173), 129 states have call successors, (173) [2021-12-21 10:19:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1084 transitions. [2021-12-21 10:19:19,998 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1084 transitions. Word has length 95 [2021-12-21 10:19:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:19,998 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1084 transitions. [2021-12-21 10:19:19,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 10:19:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1084 transitions. [2021-12-21 10:19:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 10:19:19,999 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:19,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:20,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-21 10:19:20,000 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1808548852, now seen corresponding path program 1 times [2021-12-21 10:19:20,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:20,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332401463] [2021-12-21 10:19:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:20,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 10:19:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 10:19:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 10:19:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:19:20,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:20,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332401463] [2021-12-21 10:19:20,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332401463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:20,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:20,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-21 10:19:20,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088445281] [2021-12-21 10:19:20,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:20,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:19:20,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:20,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:19:20,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:19:20,182 INFO L87 Difference]: Start difference. First operand 834 states and 1084 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 10:19:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:21,130 INFO L93 Difference]: Finished difference Result 858 states and 1116 transitions. [2021-12-21 10:19:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 10:19:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-12-21 10:19:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:21,133 INFO L225 Difference]: With dead ends: 858 [2021-12-21 10:19:21,133 INFO L226 Difference]: Without dead ends: 809 [2021-12-21 10:19:21,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 10:19:21,135 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 363 mSDsluCounter, 2921 mSDsCounter, 0 mSdLazyCounter, 1793 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 3277 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:21,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 3277 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1793 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:19:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-12-21 10:19:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 306. [2021-12-21 10:19:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 247 states have internal predecessors, (275), 41 states have call successors, (41), 21 states have call predecessors, (41), 22 states have return successors, (48), 37 states have call predecessors, (48), 38 states have call successors, (48) [2021-12-21 10:19:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 364 transitions. [2021-12-21 10:19:21,163 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 364 transitions. Word has length 93 [2021-12-21 10:19:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:21,163 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 364 transitions. [2021-12-21 10:19:21,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 10 states have internal predecessors, (78), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 10:19:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 364 transitions. [2021-12-21 10:19:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-21 10:19:21,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:21,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:21,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-21 10:19:21,165 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash 46403579, now seen corresponding path program 1 times [2021-12-21 10:19:21,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:21,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835950256] [2021-12-21 10:19:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:21,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:21,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 10:19:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 10:19:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:21,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 10:19:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 10:19:21,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-21 10:19:21,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:21,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835950256] [2021-12-21 10:19:21,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835950256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:19:21,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038186860] [2021-12-21 10:19:21,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:21,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:19:21,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:19:21,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:19:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:19:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 10:19:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:19:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 10:19:21,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:19:21,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038186860] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:21,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:19:21,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-12-21 10:19:21,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78086462] [2021-12-21 10:19:21,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:21,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:19:21,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:21,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:19:21,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:19:21,696 INFO L87 Difference]: Start difference. First operand 306 states and 364 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 10:19:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:21,764 INFO L93 Difference]: Finished difference Result 513 states and 620 transitions. [2021-12-21 10:19:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:19:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 133 [2021-12-21 10:19:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:21,766 INFO L225 Difference]: With dead ends: 513 [2021-12-21 10:19:21,766 INFO L226 Difference]: Without dead ends: 327 [2021-12-21 10:19:21,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:21,767 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 12 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:21,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 720 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:19:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-21 10:19:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 322. [2021-12-21 10:19:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 256 states have (on average 1.12890625) internal successors, (289), 262 states have internal predecessors, (289), 41 states have call successors, (41), 21 states have call predecessors, (41), 24 states have return successors, (55), 38 states have call predecessors, (55), 38 states have call successors, (55) [2021-12-21 10:19:21,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 385 transitions. [2021-12-21 10:19:21,794 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 385 transitions. Word has length 133 [2021-12-21 10:19:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:21,794 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 385 transitions. [2021-12-21 10:19:21,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-21 10:19:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 385 transitions. [2021-12-21 10:19:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-21 10:19:21,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:21,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:21,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:19:22,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-21 10:19:22,031 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1067504510, now seen corresponding path program 1 times [2021-12-21 10:19:22,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409864780] [2021-12-21 10:19:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 10:19:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 10:19:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 10:19:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 10:19:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-21 10:19:22,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:22,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409864780] [2021-12-21 10:19:22,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409864780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:22,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:22,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:22,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652357441] [2021-12-21 10:19:22,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:22,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:22,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:22,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:22,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:22,137 INFO L87 Difference]: Start difference. First operand 322 states and 385 transitions. Second operand has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-21 10:19:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:22,451 INFO L93 Difference]: Finished difference Result 534 states and 639 transitions. [2021-12-21 10:19:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 134 [2021-12-21 10:19:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:22,453 INFO L225 Difference]: With dead ends: 534 [2021-12-21 10:19:22,453 INFO L226 Difference]: Without dead ends: 362 [2021-12-21 10:19:22,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:22,454 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 118 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:22,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 1190 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-12-21 10:19:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 315. [2021-12-21 10:19:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 251 states have (on average 1.1155378486055776) internal successors, (280), 256 states have internal predecessors, (280), 39 states have call successors, (39), 21 states have call predecessors, (39), 24 states have return successors, (51), 37 states have call predecessors, (51), 36 states have call successors, (51) [2021-12-21 10:19:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 370 transitions. [2021-12-21 10:19:22,481 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 370 transitions. Word has length 134 [2021-12-21 10:19:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:22,481 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 370 transitions. [2021-12-21 10:19:22,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.7272727272727275) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 6 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-21 10:19:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 370 transitions. [2021-12-21 10:19:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-21 10:19:22,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:22,483 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:22,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-21 10:19:22,483 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1031777441, now seen corresponding path program 1 times [2021-12-21 10:19:22,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281090855] [2021-12-21 10:19:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 10:19:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 10:19:22,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 10:19:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 10:19:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 10:19:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-21 10:19:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-21 10:19:22,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281090855] [2021-12-21 10:19:22,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281090855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:22,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:22,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:22,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90265602] [2021-12-21 10:19:22,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:22,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:22,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:22,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:22,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:22,602 INFO L87 Difference]: Start difference. First operand 315 states and 370 transitions. Second operand has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 10:19:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:22,914 INFO L93 Difference]: Finished difference Result 384 states and 451 transitions. [2021-12-21 10:19:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 170 [2021-12-21 10:19:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:22,917 INFO L225 Difference]: With dead ends: 384 [2021-12-21 10:19:22,917 INFO L226 Difference]: Without dead ends: 317 [2021-12-21 10:19:22,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:22,917 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 98 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:22,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1002 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-12-21 10:19:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 217. [2021-12-21 10:19:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 176 states have (on average 1.1136363636363635) internal successors, (196), 178 states have internal predecessors, (196), 24 states have call successors, (24), 14 states have call predecessors, (24), 16 states have return successors, (30), 24 states have call predecessors, (30), 22 states have call successors, (30) [2021-12-21 10:19:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 250 transitions. [2021-12-21 10:19:22,937 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 250 transitions. Word has length 170 [2021-12-21 10:19:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:22,937 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 250 transitions. [2021-12-21 10:19:22,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.181818181818182) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 10:19:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 250 transitions. [2021-12-21 10:19:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-21 10:19:22,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:19:22,938 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:19:22,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-21 10:19:22,939 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:19:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:19:22,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1337713774, now seen corresponding path program 1 times [2021-12-21 10:19:22,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:19:22,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844818938] [2021-12-21 10:19:22,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:19:22,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:19:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 10:19:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 10:19:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:22,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 10:19:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 10:19:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-21 10:19:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-21 10:19:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 10:19:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-21 10:19:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 10:19:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 10:19:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:19:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-21 10:19:23,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:19:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844818938] [2021-12-21 10:19:23,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844818938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:19:23,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:19:23,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 10:19:23,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648793993] [2021-12-21 10:19:23,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:19:23,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:19:23,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:19:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:19:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:19:23,055 INFO L87 Difference]: Start difference. First operand 217 states and 250 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 10:19:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:19:23,351 INFO L93 Difference]: Finished difference Result 223 states and 259 transitions. [2021-12-21 10:19:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:19:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 173 [2021-12-21 10:19:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:19:23,352 INFO L225 Difference]: With dead ends: 223 [2021-12-21 10:19:23,352 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 10:19:23,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:19:23,353 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 72 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:19:23,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 801 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:19:23,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 10:19:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 10:19:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:19:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 10:19:23,354 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2021-12-21 10:19:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:19:23,354 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 10:19:23,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 10:19:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 10:19:23,355 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 10:19:23,356 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 10:19:23,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-21 10:19:23,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-21 10:19:50,446 WARN L227 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 122 DAG size of output: 120 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-21 10:20:02,945 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 121 DAG size of output: 119 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-21 10:20:08,858 WARN L227 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 121 DAG size of output: 119 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)