./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 c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-tmp.no-commuhash-c3fed41 [2021-12-15 21:57:55,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:57:55,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:57:55,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:57:55,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:57:55,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:57:55,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:57:55,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:57:55,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:57:55,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:57:55,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:57:55,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:57:55,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:57:55,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:57:55,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:57:55,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:57:55,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:57:55,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:57:55,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:57:55,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:57:55,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:57:55,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:57:55,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:57:55,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:57:55,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:57:55,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:57:55,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:57:55,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:57:55,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:57:55,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:57:55,721 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:57:55,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:57:55,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:57:55,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:57:55,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:57:55,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:57:55,724 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:57:55,724 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:57:55,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:57:55,725 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:57:55,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:57:55,727 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:57:55,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:57:55,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:57:55,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:57:55,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:57:55,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:57:55,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:57:55,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:57:55,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:57:55,754 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:57:55,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:57:55,754 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:57:55,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:57:55,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:57:55,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:57:55,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:57:55,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:57:55,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:57:55,756 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:57:55,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:57:55,756 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:57:55,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:57:55,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:57:55,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:57:55,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:57:55,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:57:55,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:57:55,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:57:55,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:57:55,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:57:55,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:57:55,760 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:57:55,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:57:55,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:57:55,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:57:55,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c [2021-12-15 21:57:55,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:57:56,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:57:56,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:57:56,012 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:57:56,012 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:57:56,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-12-15 21:57:56,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c54a04570/2880f1aa856b4d6f88f90bc053202d09/FLAG279517198 [2021-12-15 21:57:56,519 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:57:56,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2021-12-15 21:57:56,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c54a04570/2880f1aa856b4d6f88f90bc053202d09/FLAG279517198 [2021-12-15 21:57:56,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c54a04570/2880f1aa856b4d6f88f90bc053202d09 [2021-12-15 21:57:56,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:57:56,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:57:56,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:57:56,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:57:56,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:57:56,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:56,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d199269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56, skipping insertion in model container [2021-12-15 21:57:56,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:56,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:57:56,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:57:56,721 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] [2021-12-15 21:57:56,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:57:56,876 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:57:56,897 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] [2021-12-15 21:57:56,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:57:56,979 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:57:56,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56 WrapperNode [2021-12-15 21:57:56,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:57:56,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:57:56,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:57:56,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:57:56,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,047 INFO L137 Inliner]: procedures = 38, calls = 66, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 755 [2021-12-15 21:57:57,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:57:57,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:57:57,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:57:57,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:57:57,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:57:57,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:57:57,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:57:57,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:57:57,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (1/1) ... [2021-12-15 21:57:57,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:57:57,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:57:57,160 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) [2021-12-15 21:57:57,179 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 [2021-12-15 21:57:57,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:57:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-15 21:57:57,195 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-15 21:57:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-15 21:57:57,195 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-15 21:57:57,195 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-15 21:57:57,195 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-15 21:57:57,196 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2021-12-15 21:57:57,196 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2021-12-15 21:57:57,196 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2021-12-15 21:57:57,196 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2021-12-15 21:57:57,196 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-15 21:57:57,196 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-15 21:57:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:57:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-15 21:57:57,197 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-15 21:57:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2021-12-15 21:57:57,197 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2021-12-15 21:57:57,197 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2021-12-15 21:57:57,198 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2021-12-15 21:57:57,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:57:57,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:57:57,339 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:57:57,341 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:57:57,345 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 21:57:57,428 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-15 21:57:57,428 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-15 21:57:57,430 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 21:57:57,448 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-15 21:57:57,449 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-15 21:57:57,481 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 21:57:57,486 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 21:57:57,494 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 21:57:57,825 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !false; [2021-12-15 21:57:57,825 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume false; [2021-12-15 21:57:57,825 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2021-12-15 21:57:57,825 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2021-12-15 21:57:57,825 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##106: assume !false; [2021-12-15 21:57:57,826 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##105: assume false; [2021-12-15 21:57:57,827 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 21:57:57,859 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-15 21:57:57,860 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-15 21:57:57,904 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:57:57,911 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:57:57,913 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 21:57:57,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:57 BoogieIcfgContainer [2021-12-15 21:57:57,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:57:57,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:57:57,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:57:57,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:57:57,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:57:56" (1/3) ... [2021-12-15 21:57:57,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8f4f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:57:57, skipping insertion in model container [2021-12-15 21:57:57,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:57:56" (2/3) ... [2021-12-15 21:57:57,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8f4f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:57:57, skipping insertion in model container [2021-12-15 21:57:57,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:57:57" (3/3) ... [2021-12-15 21:57:57,925 INFO L111 eAbstractionObserver]: Analyzing ICFG diskperf_simpl1.cil.c [2021-12-15 21:57:57,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:57:57,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:57:57,968 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:57:57,974 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 [2021-12-15 21:57:57,974 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:57:58,010 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) [2021-12-15 21:57:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 21:57:58,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:58,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:57:58,019 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1911400740, now seen corresponding path program 1 times [2021-12-15 21:57:58,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:57:58,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768478904] [2021-12-15 21:57:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:58,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:57:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:57:58,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:57:58,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768478904] [2021-12-15 21:57:58,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768478904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:57:58,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:57:58,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:57:58,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818067560] [2021-12-15 21:57:58,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:57:58,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:57:58,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:57:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:57:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:57:58,283 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) [2021-12-15 21:57:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:58,467 INFO L93 Difference]: Finished difference Result 449 states and 690 transitions. [2021-12-15 21:57:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:57:58,470 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 [2021-12-15 21:57:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:58,479 INFO L225 Difference]: With dead ends: 449 [2021-12-15 21:57:58,479 INFO L226 Difference]: Without dead ends: 236 [2021-12-15 21:57:58,485 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 [2021-12-15 21:57:58,489 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 8 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-15 21:57:58,490 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] [2021-12-15 21:57:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-15 21:57:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-12-15 21:57:58,536 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) [2021-12-15 21:57:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 332 transitions. [2021-12-15 21:57:58,540 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 332 transitions. Word has length 13 [2021-12-15 21:57:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:57:58,541 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 332 transitions. [2021-12-15 21:57:58,541 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) [2021-12-15 21:57:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 332 transitions. [2021-12-15 21:57:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 21:57:58,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:58,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:57:58,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:57:58,543 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:58,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1078790828, now seen corresponding path program 1 times [2021-12-15 21:57:58,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:57:58,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859814949] [2021-12-15 21:57:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:58,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:57:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:57:58,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:57:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859814949] [2021-12-15 21:57:58,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859814949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:57:58,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:57:58,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:57:58,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775059757] [2021-12-15 21:57:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:57:58,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:57:58,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:57:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:57:58,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:57:58,601 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) [2021-12-15 21:57:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:58,718 INFO L93 Difference]: Finished difference Result 536 states and 777 transitions. [2021-12-15 21:57:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:57:58,719 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 [2021-12-15 21:57:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:58,726 INFO L225 Difference]: With dead ends: 536 [2021-12-15 21:57:58,727 INFO L226 Difference]: Without dead ends: 377 [2021-12-15 21:57:58,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:57:58,734 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 [2021-12-15 21:57:58,734 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] [2021-12-15 21:57:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-15 21:57:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 357. [2021-12-15 21:57:58,775 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) [2021-12-15 21:57:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 518 transitions. [2021-12-15 21:57:58,779 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 518 transitions. Word has length 15 [2021-12-15 21:57:58,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:57:58,779 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 518 transitions. [2021-12-15 21:57:58,780 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) [2021-12-15 21:57:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 518 transitions. [2021-12-15 21:57:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 21:57:58,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:58,781 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] [2021-12-15 21:57:58,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:57:58,782 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:58,783 INFO L85 PathProgramCache]: Analyzing trace with hash -320586800, now seen corresponding path program 1 times [2021-12-15 21:57:58,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:57:58,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838232364] [2021-12-15 21:57:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:58,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:57:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:57:58,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:57:58,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838232364] [2021-12-15 21:57:58,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838232364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:57:58,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:57:58,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:57:58,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479198739] [2021-12-15 21:57:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:57:58,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:57:58,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:57:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:57:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:57:58,864 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) [2021-12-15 21:57:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:58,920 INFO L93 Difference]: Finished difference Result 823 states and 1229 transitions. [2021-12-15 21:57:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:57:58,921 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 [2021-12-15 21:57:58,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:58,931 INFO L225 Difference]: With dead ends: 823 [2021-12-15 21:57:58,931 INFO L226 Difference]: Without dead ends: 550 [2021-12-15 21:57:58,933 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 [2021-12-15 21:57:58,936 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 [2021-12-15 21:57:58,938 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] [2021-12-15 21:57:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-12-15 21:57:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 519. [2021-12-15 21:57:58,992 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) [2021-12-15 21:57:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 772 transitions. [2021-12-15 21:57:58,997 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 772 transitions. Word has length 20 [2021-12-15 21:57:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:57:58,999 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 772 transitions. [2021-12-15 21:57:59,000 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) [2021-12-15 21:57:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 772 transitions. [2021-12-15 21:57:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:57:59,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:59,007 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] [2021-12-15 21:57:59,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 21:57:59,008 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash -175921138, now seen corresponding path program 1 times [2021-12-15 21:57:59,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:57:59,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577914274] [2021-12-15 21:57:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:59,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:57:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:57:59,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:57:59,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577914274] [2021-12-15 21:57:59,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577914274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:57:59,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:57:59,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:57:59,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099984972] [2021-12-15 21:57:59,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:57:59,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:57:59,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:57:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:57:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:57:59,089 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) [2021-12-15 21:57:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:59,162 INFO L93 Difference]: Finished difference Result 534 states and 792 transitions. [2021-12-15 21:57:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:57:59,162 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 [2021-12-15 21:57:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:59,167 INFO L225 Difference]: With dead ends: 534 [2021-12-15 21:57:59,168 INFO L226 Difference]: Without dead ends: 530 [2021-12-15 21:57:59,168 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 [2021-12-15 21:57:59,177 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 [2021-12-15 21:57:59,179 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] [2021-12-15 21:57:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-12-15 21:57:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 529. [2021-12-15 21:57:59,228 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) [2021-12-15 21:57:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 785 transitions. [2021-12-15 21:57:59,234 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 785 transitions. Word has length 24 [2021-12-15 21:57:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:57:59,235 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 785 transitions. [2021-12-15 21:57:59,235 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) [2021-12-15 21:57:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 785 transitions. [2021-12-15 21:57:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 21:57:59,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:59,238 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] [2021-12-15 21:57:59,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 21:57:59,238 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1035800982, now seen corresponding path program 1 times [2021-12-15 21:57:59,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:57:59,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282488838] [2021-12-15 21:57:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:59,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:57:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:59,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 21:57:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:57:59,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:57:59,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282488838] [2021-12-15 21:57:59,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282488838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:57:59,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:57:59,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:57:59,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068112487] [2021-12-15 21:57:59,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:57:59,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:57:59,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:57:59,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:57:59,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:57:59,375 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) [2021-12-15 21:57:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:57:59,709 INFO L93 Difference]: Finished difference Result 582 states and 861 transitions. [2021-12-15 21:57:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 21:57:59,710 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 [2021-12-15 21:57:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:57:59,713 INFO L225 Difference]: With dead ends: 582 [2021-12-15 21:57:59,714 INFO L226 Difference]: Without dead ends: 571 [2021-12-15 21:57:59,714 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 [2021-12-15 21:57:59,715 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:57:59,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 798 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:57:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-15 21:57:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2021-12-15 21:57:59,749 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) [2021-12-15 21:57:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 826 transitions. [2021-12-15 21:57:59,754 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 826 transitions. Word has length 27 [2021-12-15 21:57:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:57:59,754 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 826 transitions. [2021-12-15 21:57:59,754 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) [2021-12-15 21:57:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 826 transitions. [2021-12-15 21:57:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-15 21:57:59,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:57:59,757 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] [2021-12-15 21:57:59,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 21:57:59,757 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:57:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:57:59,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1813713707, now seen corresponding path program 1 times [2021-12-15 21:57:59,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:57:59,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818509767] [2021-12-15 21:57:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:57:59,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:57:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:59,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 21:57:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:57:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:57:59,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:57:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818509767] [2021-12-15 21:57:59,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818509767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:57:59,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:57:59,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:57:59,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312762355] [2021-12-15 21:57:59,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:57:59,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:57:59,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:57:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:57:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:57:59,861 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) [2021-12-15 21:58:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:00,201 INFO L93 Difference]: Finished difference Result 579 states and 854 transitions. [2021-12-15 21:58:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 21:58:00,202 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 [2021-12-15 21:58:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:00,205 INFO L225 Difference]: With dead ends: 579 [2021-12-15 21:58:00,205 INFO L226 Difference]: Without dead ends: 571 [2021-12-15 21:58:00,206 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 [2021-12-15 21:58:00,207 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:00,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 799 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:58:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-15 21:58:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2021-12-15 21:58:00,236 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) [2021-12-15 21:58:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 825 transitions. [2021-12-15 21:58:00,243 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 825 transitions. Word has length 28 [2021-12-15 21:58:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:00,244 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 825 transitions. [2021-12-15 21:58:00,244 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) [2021-12-15 21:58:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 825 transitions. [2021-12-15 21:58:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 21:58:00,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:00,245 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] [2021-12-15 21:58:00,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 21:58:00,246 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash 123360193, now seen corresponding path program 1 times [2021-12-15 21:58:00,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145453196] [2021-12-15 21:58:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:00,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:00,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 21:58:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:00,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:00,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145453196] [2021-12-15 21:58:00,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145453196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:00,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:00,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:58:00,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533671959] [2021-12-15 21:58:00,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:00,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:58:00,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:58:00,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:58:00,279 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) [2021-12-15 21:58:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:00,494 INFO L93 Difference]: Finished difference Result 1018 states and 1542 transitions. [2021-12-15 21:58:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:58:00,494 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 [2021-12-15 21:58:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:00,501 INFO L225 Difference]: With dead ends: 1018 [2021-12-15 21:58:00,501 INFO L226 Difference]: Without dead ends: 989 [2021-12-15 21:58:00,502 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 [2021-12-15 21:58:00,503 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:00,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 777 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-12-15 21:58:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 949. [2021-12-15 21:58:00,550 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) [2021-12-15 21:58:00,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1446 transitions. [2021-12-15 21:58:00,557 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1446 transitions. Word has length 29 [2021-12-15 21:58:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:00,559 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1446 transitions. [2021-12-15 21:58:00,559 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) [2021-12-15 21:58:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1446 transitions. [2021-12-15 21:58:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-15 21:58:00,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:00,562 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] [2021-12-15 21:58:00,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 21:58:00,563 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:00,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -462412845, now seen corresponding path program 1 times [2021-12-15 21:58:00,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:00,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110412745] [2021-12-15 21:58:00,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:00,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:00,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-15 21:58:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:00,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:00,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110412745] [2021-12-15 21:58:00,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110412745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:00,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:00,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 21:58:00,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232720395] [2021-12-15 21:58:00,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:00,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 21:58:00,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:00,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 21:58:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:58:00,618 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) [2021-12-15 21:58:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:00,787 INFO L93 Difference]: Finished difference Result 985 states and 1494 transitions. [2021-12-15 21:58:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:58:00,788 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 [2021-12-15 21:58:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:00,794 INFO L225 Difference]: With dead ends: 985 [2021-12-15 21:58:00,794 INFO L226 Difference]: Without dead ends: 966 [2021-12-15 21:58:00,795 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 [2021-12-15 21:58:00,796 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 [2021-12-15 21:58:00,796 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] [2021-12-15 21:58:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-15 21:58:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 945. [2021-12-15 21:58:00,853 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) [2021-12-15 21:58:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1440 transitions. [2021-12-15 21:58:00,860 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1440 transitions. Word has length 30 [2021-12-15 21:58:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:00,861 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1440 transitions. [2021-12-15 21:58:00,861 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) [2021-12-15 21:58:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1440 transitions. [2021-12-15 21:58:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 21:58:00,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:00,862 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] [2021-12-15 21:58:00,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 21:58:00,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:00,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:00,863 INFO L85 PathProgramCache]: Analyzing trace with hash 415913558, now seen corresponding path program 1 times [2021-12-15 21:58:00,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:00,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812036118] [2021-12-15 21:58:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:00,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:00,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:00,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812036118] [2021-12-15 21:58:00,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812036118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:00,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:00,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:58:00,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104877664] [2021-12-15 21:58:00,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:00,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:58:00,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:58:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:58:00,918 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) [2021-12-15 21:58:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:00,954 INFO L93 Difference]: Finished difference Result 1334 states and 2062 transitions. [2021-12-15 21:58:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:58:00,954 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 [2021-12-15 21:58:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:00,958 INFO L225 Difference]: With dead ends: 1334 [2021-12-15 21:58:00,958 INFO L226 Difference]: Without dead ends: 510 [2021-12-15 21:58:00,963 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 [2021-12-15 21:58:00,965 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 [2021-12-15 21:58:00,965 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] [2021-12-15 21:58:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-15 21:58:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2021-12-15 21:58:00,990 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) [2021-12-15 21:58:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 754 transitions. [2021-12-15 21:58:00,994 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 754 transitions. Word has length 34 [2021-12-15 21:58:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:00,995 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 754 transitions. [2021-12-15 21:58:00,995 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) [2021-12-15 21:58:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 754 transitions. [2021-12-15 21:58:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 21:58:00,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:00,996 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] [2021-12-15 21:58:00,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 21:58:00,997 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2105808494, now seen corresponding path program 1 times [2021-12-15 21:58:00,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:00,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817435920] [2021-12-15 21:58:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:00,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:01,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:01,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:01,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817435920] [2021-12-15 21:58:01,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817435920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:01,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:01,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:58:01,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799792126] [2021-12-15 21:58:01,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:01,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:58:01,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:01,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:58:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:58:01,064 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) [2021-12-15 21:58:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:01,232 INFO L93 Difference]: Finished difference Result 553 states and 805 transitions. [2021-12-15 21:58:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:58:01,232 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 [2021-12-15 21:58:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:01,236 INFO L225 Difference]: With dead ends: 553 [2021-12-15 21:58:01,236 INFO L226 Difference]: Without dead ends: 519 [2021-12-15 21:58:01,237 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 [2021-12-15 21:58:01,237 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 [2021-12-15 21:58:01,238 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] [2021-12-15 21:58:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-12-15 21:58:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2021-12-15 21:58:01,292 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) [2021-12-15 21:58:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 749 transitions. [2021-12-15 21:58:01,295 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 749 transitions. Word has length 34 [2021-12-15 21:58:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:01,296 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 749 transitions. [2021-12-15 21:58:01,296 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) [2021-12-15 21:58:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 749 transitions. [2021-12-15 21:58:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 21:58:01,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:01,297 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] [2021-12-15 21:58:01,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 21:58:01,298 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:01,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1486754927, now seen corresponding path program 1 times [2021-12-15 21:58:01,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:01,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703542195] [2021-12-15 21:58:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:01,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:01,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 21:58:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:01,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:01,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703542195] [2021-12-15 21:58:01,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703542195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:01,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:01,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:58:01,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27830058] [2021-12-15 21:58:01,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:01,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:58:01,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:01,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:58:01,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:58:01,341 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) [2021-12-15 21:58:01,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:01,610 INFO L93 Difference]: Finished difference Result 720 states and 1102 transitions. [2021-12-15 21:58:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:58:01,611 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 [2021-12-15 21:58:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:01,617 INFO L225 Difference]: With dead ends: 720 [2021-12-15 21:58:01,617 INFO L226 Difference]: Without dead ends: 712 [2021-12-15 21:58:01,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:58:01,618 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 [2021-12-15 21:58:01,619 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] [2021-12-15 21:58:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-12-15 21:58:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 566. [2021-12-15 21:58:01,656 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) [2021-12-15 21:58:01,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 841 transitions. [2021-12-15 21:58:01,660 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 841 transitions. Word has length 34 [2021-12-15 21:58:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:01,660 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 841 transitions. [2021-12-15 21:58:01,660 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) [2021-12-15 21:58:01,661 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 841 transitions. [2021-12-15 21:58:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:58:01,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:01,662 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] [2021-12-15 21:58:01,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 21:58:01,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1608594996, now seen corresponding path program 1 times [2021-12-15 21:58:01,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:01,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110847348] [2021-12-15 21:58:01,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:01,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:01,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 21:58:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:01,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110847348] [2021-12-15 21:58:01,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110847348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:01,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:01,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 21:58:01,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544421809] [2021-12-15 21:58:01,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:01,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 21:58:01,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:01,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 21:58:01,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:58:01,742 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) [2021-12-15 21:58:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:02,064 INFO L93 Difference]: Finished difference Result 583 states and 860 transitions. [2021-12-15 21:58:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:58:02,065 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 [2021-12-15 21:58:02,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:02,068 INFO L225 Difference]: With dead ends: 583 [2021-12-15 21:58:02,068 INFO L226 Difference]: Without dead ends: 579 [2021-12-15 21:58:02,068 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 [2021-12-15 21:58:02,069 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:02,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1471 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:58:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-15 21:58:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 574. [2021-12-15 21:58:02,094 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) [2021-12-15 21:58:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 851 transitions. [2021-12-15 21:58:02,098 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 851 transitions. Word has length 35 [2021-12-15 21:58:02,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:02,098 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 851 transitions. [2021-12-15 21:58:02,098 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) [2021-12-15 21:58:02,098 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 851 transitions. [2021-12-15 21:58:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:58:02,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:02,099 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] [2021-12-15 21:58:02,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 21:58:02,100 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1608318166, now seen corresponding path program 1 times [2021-12-15 21:58:02,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:02,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875632713] [2021-12-15 21:58:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:02,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:02,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 21:58:02,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:02,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:02,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875632713] [2021-12-15 21:58:02,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875632713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:02,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:02,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 21:58:02,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528456825] [2021-12-15 21:58:02,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:02,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 21:58:02,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:02,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 21:58:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:58:02,178 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) [2021-12-15 21:58:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:02,445 INFO L93 Difference]: Finished difference Result 1065 states and 1652 transitions. [2021-12-15 21:58:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:58:02,446 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 [2021-12-15 21:58:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:02,450 INFO L225 Difference]: With dead ends: 1065 [2021-12-15 21:58:02,450 INFO L226 Difference]: Without dead ends: 605 [2021-12-15 21:58:02,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:58:02,452 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 75 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-15 21:58:02,452 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] [2021-12-15 21:58:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-12-15 21:58:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 586. [2021-12-15 21:58:02,478 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) [2021-12-15 21:58:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 887 transitions. [2021-12-15 21:58:02,482 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 887 transitions. Word has length 35 [2021-12-15 21:58:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:02,482 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 887 transitions. [2021-12-15 21:58:02,482 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) [2021-12-15 21:58:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 887 transitions. [2021-12-15 21:58:02,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 21:58:02,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:02,484 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] [2021-12-15 21:58:02,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 21:58:02,484 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:02,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1299938960, now seen corresponding path program 1 times [2021-12-15 21:58:02,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630839568] [2021-12-15 21:58:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:02,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:02,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:02,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630839568] [2021-12-15 21:58:02,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630839568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:02,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:02,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:58:02,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113357390] [2021-12-15 21:58:02,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:02,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:58:02,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:58:02,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:58:02,511 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) [2021-12-15 21:58:02,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:02,642 INFO L93 Difference]: Finished difference Result 610 states and 910 transitions. [2021-12-15 21:58:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:58:02,643 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 [2021-12-15 21:58:02,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:02,646 INFO L225 Difference]: With dead ends: 610 [2021-12-15 21:58:02,646 INFO L226 Difference]: Without dead ends: 582 [2021-12-15 21:58:02,647 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 [2021-12-15 21:58:02,647 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 [2021-12-15 21:58:02,647 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] [2021-12-15 21:58:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-12-15 21:58:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 580. [2021-12-15 21:58:02,675 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) [2021-12-15 21:58:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 876 transitions. [2021-12-15 21:58:02,679 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 876 transitions. Word has length 34 [2021-12-15 21:58:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:02,679 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 876 transitions. [2021-12-15 21:58:02,679 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) [2021-12-15 21:58:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 876 transitions. [2021-12-15 21:58:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 21:58:02,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:02,681 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] [2021-12-15 21:58:02,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 21:58:02,681 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:02,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1171529217, now seen corresponding path program 1 times [2021-12-15 21:58:02,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:02,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656998627] [2021-12-15 21:58:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:02,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:02,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-15 21:58:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:02,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:02,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656998627] [2021-12-15 21:58:02,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656998627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:02,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:02,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:58:02,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092172525] [2021-12-15 21:58:02,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:02,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:58:02,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:58:02,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:58:02,735 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) [2021-12-15 21:58:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:03,217 INFO L93 Difference]: Finished difference Result 738 states and 1149 transitions. [2021-12-15 21:58:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:58:03,217 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 [2021-12-15 21:58:03,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:03,222 INFO L225 Difference]: With dead ends: 738 [2021-12-15 21:58:03,222 INFO L226 Difference]: Without dead ends: 721 [2021-12-15 21:58:03,223 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 [2021-12-15 21:58:03,223 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 662 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:03,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 768 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 21:58:03,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-15 21:58:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 567. [2021-12-15 21:58:03,269 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) [2021-12-15 21:58:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 842 transitions. [2021-12-15 21:58:03,272 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 842 transitions. Word has length 36 [2021-12-15 21:58:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:03,273 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 842 transitions. [2021-12-15 21:58:03,273 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) [2021-12-15 21:58:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 842 transitions. [2021-12-15 21:58:03,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 21:58:03,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:03,274 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] [2021-12-15 21:58:03,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 21:58:03,275 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:03,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2056934280, now seen corresponding path program 1 times [2021-12-15 21:58:03,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:03,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540446996] [2021-12-15 21:58:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:03,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:03,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 21:58:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:03,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:03,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540446996] [2021-12-15 21:58:03,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540446996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:03,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:03,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 21:58:03,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132316865] [2021-12-15 21:58:03,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:03,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 21:58:03,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:03,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 21:58:03,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:58:03,323 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) [2021-12-15 21:58:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:03,569 INFO L93 Difference]: Finished difference Result 630 states and 904 transitions. [2021-12-15 21:58:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:58:03,569 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 [2021-12-15 21:58:03,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:03,572 INFO L225 Difference]: With dead ends: 630 [2021-12-15 21:58:03,572 INFO L226 Difference]: Without dead ends: 377 [2021-12-15 21:58:03,573 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 [2021-12-15 21:58:03,573 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 315 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:03,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 650 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-15 21:58:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2021-12-15 21:58:03,592 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) [2021-12-15 21:58:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 492 transitions. [2021-12-15 21:58:03,593 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 492 transitions. Word has length 39 [2021-12-15 21:58:03,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:03,594 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 492 transitions. [2021-12-15 21:58:03,594 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) [2021-12-15 21:58:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 492 transitions. [2021-12-15 21:58:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:58:03,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:03,595 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] [2021-12-15 21:58:03,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 21:58:03,595 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1922765712, now seen corresponding path program 1 times [2021-12-15 21:58:03,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:03,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102713883] [2021-12-15 21:58:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:03,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:03,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:03,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102713883] [2021-12-15 21:58:03,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102713883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:03,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:03,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:58:03,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175284405] [2021-12-15 21:58:03,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:03,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:58:03,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:03,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:58:03,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:58:03,620 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) [2021-12-15 21:58:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:03,701 INFO L93 Difference]: Finished difference Result 504 states and 710 transitions. [2021-12-15 21:58:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:58:03,701 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 [2021-12-15 21:58:03,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:03,704 INFO L225 Difference]: With dead ends: 504 [2021-12-15 21:58:03,704 INFO L226 Difference]: Without dead ends: 491 [2021-12-15 21:58:03,705 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 [2021-12-15 21:58:03,705 INFO L933 BasicCegarLoop]: 420 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, 641 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:03,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 641 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:58:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-12-15 21:58:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 375. [2021-12-15 21:58:03,725 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) [2021-12-15 21:58:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 509 transitions. [2021-12-15 21:58:03,727 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 509 transitions. Word has length 35 [2021-12-15 21:58:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:03,727 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 509 transitions. [2021-12-15 21:58:03,727 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) [2021-12-15 21:58:03,728 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 509 transitions. [2021-12-15 21:58:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:58:03,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:03,728 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] [2021-12-15 21:58:03,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 21:58:03,729 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1798212464, now seen corresponding path program 1 times [2021-12-15 21:58:03,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636448433] [2021-12-15 21:58:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:03,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:03,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636448433] [2021-12-15 21:58:03,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636448433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:03,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:03,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:58:03,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067933671] [2021-12-15 21:58:03,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:03,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:58:03,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:58:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:58:03,780 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) [2021-12-15 21:58:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:03,892 INFO L93 Difference]: Finished difference Result 387 states and 521 transitions. [2021-12-15 21:58:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:58:03,892 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 [2021-12-15 21:58:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:03,894 INFO L225 Difference]: With dead ends: 387 [2021-12-15 21:58:03,894 INFO L226 Difference]: Without dead ends: 353 [2021-12-15 21:58:03,894 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 [2021-12-15 21:58:03,895 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 [2021-12-15 21:58:03,895 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] [2021-12-15 21:58:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-15 21:58:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2021-12-15 21:58:03,928 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) [2021-12-15 21:58:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 476 transitions. [2021-12-15 21:58:03,930 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 476 transitions. Word has length 35 [2021-12-15 21:58:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:03,930 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 476 transitions. [2021-12-15 21:58:03,930 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) [2021-12-15 21:58:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 476 transitions. [2021-12-15 21:58:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 21:58:03,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:03,931 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] [2021-12-15 21:58:03,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 21:58:03,931 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1722219638, now seen corresponding path program 1 times [2021-12-15 21:58:03,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055537546] [2021-12-15 21:58:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:03,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:03,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:03,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055537546] [2021-12-15 21:58:03,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055537546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:03,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:03,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 21:58:03,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387869071] [2021-12-15 21:58:03,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:03,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 21:58:03,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:03,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 21:58:03,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:58:03,988 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) [2021-12-15 21:58:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:04,223 INFO L93 Difference]: Finished difference Result 355 states and 479 transitions. [2021-12-15 21:58:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:58:04,224 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 [2021-12-15 21:58:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:04,225 INFO L225 Difference]: With dead ends: 355 [2021-12-15 21:58:04,226 INFO L226 Difference]: Without dead ends: 324 [2021-12-15 21:58:04,226 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 [2021-12-15 21:58:04,228 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 60 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-15 21:58:04,228 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] [2021-12-15 21:58:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-15 21:58:04,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2021-12-15 21:58:04,242 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) [2021-12-15 21:58:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 444 transitions. [2021-12-15 21:58:04,244 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 444 transitions. Word has length 37 [2021-12-15 21:58:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:04,244 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 444 transitions. [2021-12-15 21:58:04,244 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) [2021-12-15 21:58:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 444 transitions. [2021-12-15 21:58:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 21:58:04,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:04,245 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] [2021-12-15 21:58:04,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 21:58:04,246 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:04,246 INFO L85 PathProgramCache]: Analyzing trace with hash -70447595, now seen corresponding path program 1 times [2021-12-15 21:58:04,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:04,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803900263] [2021-12-15 21:58:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:04,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:04,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:04,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803900263] [2021-12-15 21:58:04,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803900263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:04,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:04,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:58:04,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3413512] [2021-12-15 21:58:04,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:04,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:58:04,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:04,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:58:04,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:58:04,278 INFO L87 Difference]: Start difference. First operand 324 states and 444 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-12-15 21:58:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:04,339 INFO L93 Difference]: Finished difference Result 339 states and 460 transitions. [2021-12-15 21:58:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:58:04,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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 [2021-12-15 21:58:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:04,342 INFO L225 Difference]: With dead ends: 339 [2021-12-15 21:58:04,342 INFO L226 Difference]: Without dead ends: 335 [2021-12-15 21:58:04,342 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 [2021-12-15 21:58:04,343 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 46 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:04,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 1175 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:58:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-15 21:58:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2021-12-15 21:58:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 270 states have (on average 1.2851851851851852) internal successors, (347), 276 states have internal predecessors, (347), 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) [2021-12-15 21:58:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 452 transitions. [2021-12-15 21:58:04,365 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 452 transitions. Word has length 36 [2021-12-15 21:58:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 452 transitions. [2021-12-15 21:58:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-12-15 21:58:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 452 transitions. [2021-12-15 21:58:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 21:58:04,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:04,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:04,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 21:58:04,367 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:04,368 INFO L85 PathProgramCache]: Analyzing trace with hash -70724425, now seen corresponding path program 1 times [2021-12-15 21:58:04,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:04,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764009977] [2021-12-15 21:58:04,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:04,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:04,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:04,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764009977] [2021-12-15 21:58:04,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764009977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:04,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:04,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:58:04,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014120867] [2021-12-15 21:58:04,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:04,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:58:04,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:04,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:58:04,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:58:04,406 INFO L87 Difference]: Start difference. First operand 331 states and 452 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-12-15 21:58:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:04,456 INFO L93 Difference]: Finished difference Result 350 states and 471 transitions. [2021-12-15 21:58:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:58:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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 [2021-12-15 21:58:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:04,458 INFO L225 Difference]: With dead ends: 350 [2021-12-15 21:58:04,458 INFO L226 Difference]: Without dead ends: 330 [2021-12-15 21:58:04,462 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 [2021-12-15 21:58:04,462 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 38 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:04,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1215 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:58:04,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-15 21:58:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-12-15 21:58:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 269 states have (on average 1.2825278810408922) internal successors, (345), 275 states have internal predecessors, (345), 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) [2021-12-15 21:58:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 450 transitions. [2021-12-15 21:58:04,489 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 450 transitions. Word has length 36 [2021-12-15 21:58:04,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:04,489 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 450 transitions. [2021-12-15 21:58:04,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-12-15 21:58:04,489 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 450 transitions. [2021-12-15 21:58:04,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 21:58:04,490 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:04,490 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] [2021-12-15 21:58:04,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 21:58:04,491 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:04,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2018897985, now seen corresponding path program 1 times [2021-12-15 21:58:04,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:04,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873078201] [2021-12-15 21:58:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:04,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:04,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-15 21:58:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:04,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:04,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873078201] [2021-12-15 21:58:04,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873078201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:04,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:04,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:58:04,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665480270] [2021-12-15 21:58:04,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:04,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:58:04,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:04,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:58:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:58:04,529 INFO L87 Difference]: Start difference. First operand 330 states and 450 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) [2021-12-15 21:58:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:04,662 INFO L93 Difference]: Finished difference Result 359 states and 487 transitions. [2021-12-15 21:58:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:58:04,662 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 [2021-12-15 21:58:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:04,664 INFO L225 Difference]: With dead ends: 359 [2021-12-15 21:58:04,664 INFO L226 Difference]: Without dead ends: 329 [2021-12-15 21:58:04,665 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 [2021-12-15 21:58:04,666 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 [2021-12-15 21:58:04,666 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] [2021-12-15 21:58:04,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-15 21:58:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 315. [2021-12-15 21:58:04,683 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) [2021-12-15 21:58:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 433 transitions. [2021-12-15 21:58:04,684 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 433 transitions. Word has length 38 [2021-12-15 21:58:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:04,684 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 433 transitions. [2021-12-15 21:58:04,685 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) [2021-12-15 21:58:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 433 transitions. [2021-12-15 21:58:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 21:58:04,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:04,685 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] [2021-12-15 21:58:04,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 21:58:04,686 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:04,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:04,686 INFO L85 PathProgramCache]: Analyzing trace with hash 233401978, now seen corresponding path program 1 times [2021-12-15 21:58:04,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:04,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6434730] [2021-12-15 21:58:04,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:04,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:04,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:04,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6434730] [2021-12-15 21:58:04,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6434730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:04,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:04,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:58:04,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016350956] [2021-12-15 21:58:04,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:04,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:58:04,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:04,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:58:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:58:04,728 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) [2021-12-15 21:58:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:04,911 INFO L93 Difference]: Finished difference Result 431 states and 618 transitions. [2021-12-15 21:58:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:58:04,912 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 [2021-12-15 21:58:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:04,914 INFO L225 Difference]: With dead ends: 431 [2021-12-15 21:58:04,914 INFO L226 Difference]: Without dead ends: 402 [2021-12-15 21:58:04,915 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 [2021-12-15 21:58:04,916 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:04,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 501 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-15 21:58:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-12-15 21:58:04,933 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) [2021-12-15 21:58:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 406 transitions. [2021-12-15 21:58:04,935 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 406 transitions. Word has length 37 [2021-12-15 21:58:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:04,935 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 406 transitions. [2021-12-15 21:58:04,935 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) [2021-12-15 21:58:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 406 transitions. [2021-12-15 21:58:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 21:58:04,936 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:04,936 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] [2021-12-15 21:58:04,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 21:58:04,937 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:04,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1150124824, now seen corresponding path program 1 times [2021-12-15 21:58:04,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:04,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903634620] [2021-12-15 21:58:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:04,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:04,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-15 21:58:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-15 21:58:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:04,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903634620] [2021-12-15 21:58:04,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903634620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:04,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:04,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 21:58:04,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048652906] [2021-12-15 21:58:04,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:04,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 21:58:04,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:04,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 21:58:04,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:58:04,979 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) [2021-12-15 21:58:05,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:05,124 INFO L93 Difference]: Finished difference Result 544 states and 787 transitions. [2021-12-15 21:58:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:58:05,124 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 [2021-12-15 21:58:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:05,127 INFO L225 Difference]: With dead ends: 544 [2021-12-15 21:58:05,127 INFO L226 Difference]: Without dead ends: 310 [2021-12-15 21:58:05,128 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 [2021-12-15 21:58:05,128 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 [2021-12-15 21:58:05,129 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] [2021-12-15 21:58:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-12-15 21:58:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 302. [2021-12-15 21:58:05,151 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) [2021-12-15 21:58:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 420 transitions. [2021-12-15 21:58:05,152 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 420 transitions. Word has length 43 [2021-12-15 21:58:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:05,153 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 420 transitions. [2021-12-15 21:58:05,153 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) [2021-12-15 21:58:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 420 transitions. [2021-12-15 21:58:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 21:58:05,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:05,154 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] [2021-12-15 21:58:05,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 21:58:05,154 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1967801604, now seen corresponding path program 1 times [2021-12-15 21:58:05,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:05,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038719532] [2021-12-15 21:58:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:05,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:05,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-15 21:58:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:05,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:05,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038719532] [2021-12-15 21:58:05,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038719532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:05,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:05,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 21:58:05,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471858085] [2021-12-15 21:58:05,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:05,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:58:05,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:05,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:58:05,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:58:05,213 INFO L87 Difference]: Start difference. First operand 302 states and 420 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 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) [2021-12-15 21:58:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:05,511 INFO L93 Difference]: Finished difference Result 304 states and 421 transitions. [2021-12-15 21:58:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:58:05,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 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 [2021-12-15 21:58:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:05,513 INFO L225 Difference]: With dead ends: 304 [2021-12-15 21:58:05,513 INFO L226 Difference]: Without dead ends: 270 [2021-12-15 21:58:05,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-15 21:58:05,514 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 68 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:05,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1244 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:58:05,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-15 21:58:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-12-15 21:58:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 214 states have (on average 1.3271028037383177) internal successors, (284), 218 states have internal predecessors, (284), 42 states have call successors, (42), 14 states have call predecessors, (42), 13 states have return successors, (58), 37 states have call predecessors, (58), 37 states have call successors, (58) [2021-12-15 21:58:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 384 transitions. [2021-12-15 21:58:05,531 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 384 transitions. Word has length 43 [2021-12-15 21:58:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:05,531 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 384 transitions. [2021-12-15 21:58:05,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 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) [2021-12-15 21:58:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 384 transitions. [2021-12-15 21:58:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 21:58:05,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:05,532 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] [2021-12-15 21:58:05,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 21:58:05,532 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash -896869873, now seen corresponding path program 1 times [2021-12-15 21:58:05,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:05,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774113048] [2021-12-15 21:58:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:05,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:05,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 21:58:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:05,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:05,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774113048] [2021-12-15 21:58:05,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774113048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:05,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:05,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-15 21:58:05,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199591207] [2021-12-15 21:58:05,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:05,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 21:58:05,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 21:58:05,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-15 21:58:05,664 INFO L87 Difference]: Start difference. First operand 270 states and 384 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 6 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) [2021-12-15 21:58:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:05,884 INFO L93 Difference]: Finished difference Result 501 states and 736 transitions. [2021-12-15 21:58:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:58:05,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 6 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 [2021-12-15 21:58:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:05,886 INFO L225 Difference]: With dead ends: 501 [2021-12-15 21:58:05,886 INFO L226 Difference]: Without dead ends: 257 [2021-12-15 21:58:05,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:58:05,888 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 96 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:05,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1309 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-15 21:58:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 251. [2021-12-15 21:58:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 196 states have (on average 1.3010204081632653) internal successors, (255), 199 states have internal predecessors, (255), 41 states have call successors, (41), 14 states have call predecessors, (41), 13 states have return successors, (58), 37 states have call predecessors, (58), 37 states have call successors, (58) [2021-12-15 21:58:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 354 transitions. [2021-12-15 21:58:05,910 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 354 transitions. Word has length 48 [2021-12-15 21:58:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:05,910 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 354 transitions. [2021-12-15 21:58:05,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 6 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) [2021-12-15 21:58:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 354 transitions. [2021-12-15 21:58:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 21:58:05,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:05,911 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] [2021-12-15 21:58:05,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 21:58:05,911 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash -117067224, now seen corresponding path program 1 times [2021-12-15 21:58:05,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363549341] [2021-12-15 21:58:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:05,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:05,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 21:58:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:05,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:06,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:06,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363549341] [2021-12-15 21:58:06,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363549341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:06,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:06,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 21:58:06,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315389566] [2021-12-15 21:58:06,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:06,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:58:06,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:06,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:58:06,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:58:06,013 INFO L87 Difference]: Start difference. First operand 251 states and 354 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:58:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:06,316 INFO L93 Difference]: Finished difference Result 482 states and 700 transitions. [2021-12-15 21:58:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:58:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-12-15 21:58:06,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:06,319 INFO L225 Difference]: With dead ends: 482 [2021-12-15 21:58:06,319 INFO L226 Difference]: Without dead ends: 257 [2021-12-15 21:58:06,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-15 21:58:06,321 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 217 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:06,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 843 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-15 21:58:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 251. [2021-12-15 21:58:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 196 states have (on average 1.2908163265306123) internal successors, (253), 199 states have internal predecessors, (253), 41 states have call successors, (41), 14 states have call predecessors, (41), 13 states have return successors, (58), 37 states have call predecessors, (58), 37 states have call successors, (58) [2021-12-15 21:58:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 352 transitions. [2021-12-15 21:58:06,343 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 352 transitions. Word has length 52 [2021-12-15 21:58:06,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:06,344 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 352 transitions. [2021-12-15 21:58:06,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 6 states have internal predecessors, (43), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:58:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 352 transitions. [2021-12-15 21:58:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 21:58:06,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:06,350 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] [2021-12-15 21:58:06,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 21:58:06,351 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash 952481223, now seen corresponding path program 1 times [2021-12-15 21:58:06,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:06,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713026417] [2021-12-15 21:58:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:06,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-15 21:58:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:06,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:06,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713026417] [2021-12-15 21:58:06,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713026417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:06,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:06,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 21:58:06,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943042652] [2021-12-15 21:58:06,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:06,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:58:06,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:58:06,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:58:06,430 INFO L87 Difference]: Start difference. First operand 251 states and 352 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:58:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:06,620 INFO L93 Difference]: Finished difference Result 497 states and 725 transitions. [2021-12-15 21:58:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:58:06,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-12-15 21:58:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:06,623 INFO L225 Difference]: With dead ends: 497 [2021-12-15 21:58:06,623 INFO L226 Difference]: Without dead ends: 271 [2021-12-15 21:58:06,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-15 21:58:06,624 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 50 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:06,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1182 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-15 21:58:06,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 256. [2021-12-15 21:58:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 200 states have (on average 1.285) internal successors, (257), 203 states have internal predecessors, (257), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (67), 38 states have call predecessors, (67), 37 states have call successors, (67) [2021-12-15 21:58:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 365 transitions. [2021-12-15 21:58:06,641 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 365 transitions. Word has length 53 [2021-12-15 21:58:06,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:06,642 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 365 transitions. [2021-12-15 21:58:06,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:58:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 365 transitions. [2021-12-15 21:58:06,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 21:58:06,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:06,643 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] [2021-12-15 21:58:06,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 21:58:06,643 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:06,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1047088286, now seen corresponding path program 1 times [2021-12-15 21:58:06,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:06,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37966795] [2021-12-15 21:58:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:06,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 21:58:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:06,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:06,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37966795] [2021-12-15 21:58:06,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37966795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:06,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:06,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:58:06,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579410949] [2021-12-15 21:58:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:06,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:58:06,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:58:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:58:06,697 INFO L87 Difference]: Start difference. First operand 256 states and 365 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:58:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:06,907 INFO L93 Difference]: Finished difference Result 392 states and 581 transitions. [2021-12-15 21:58:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:58:06,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2021-12-15 21:58:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:06,910 INFO L225 Difference]: With dead ends: 392 [2021-12-15 21:58:06,910 INFO L226 Difference]: Without dead ends: 389 [2021-12-15 21:58:06,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:58:06,911 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 130 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:06,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 908 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-15 21:58:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 260. [2021-12-15 21:58:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 204 states have (on average 1.2892156862745099) internal successors, (263), 207 states have internal predecessors, (263), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (67), 38 states have call predecessors, (67), 37 states have call successors, (67) [2021-12-15 21:58:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 371 transitions. [2021-12-15 21:58:06,933 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 371 transitions. Word has length 55 [2021-12-15 21:58:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:06,933 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 371 transitions. [2021-12-15 21:58:06,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-15 21:58:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 371 transitions. [2021-12-15 21:58:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 21:58:06,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:06,934 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] [2021-12-15 21:58:06,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-15 21:58:06,934 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:06,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1661954664, now seen corresponding path program 1 times [2021-12-15 21:58:06,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:06,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86367583] [2021-12-15 21:58:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:06,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-15 21:58:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:06,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:07,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86367583] [2021-12-15 21:58:07,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86367583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:07,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:07,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 21:58:07,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110927414] [2021-12-15 21:58:07,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:07,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:58:07,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:58:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 21:58:07,005 INFO L87 Difference]: Start difference. First operand 260 states and 371 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:58:07,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:07,210 INFO L93 Difference]: Finished difference Result 595 states and 864 transitions. [2021-12-15 21:58:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 21:58:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-15 21:58:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:07,214 INFO L225 Difference]: With dead ends: 595 [2021-12-15 21:58:07,214 INFO L226 Difference]: Without dead ends: 366 [2021-12-15 21:58:07,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:58:07,216 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 268 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:07,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 549 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:58:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-15 21:58:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 341. [2021-12-15 21:58:07,237 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) [2021-12-15 21:58:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 481 transitions. [2021-12-15 21:58:07,238 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 481 transitions. Word has length 56 [2021-12-15 21:58:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:07,239 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 481 transitions. [2021-12-15 21:58:07,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-15 21:58:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 481 transitions. [2021-12-15 21:58:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 21:58:07,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:07,240 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] [2021-12-15 21:58:07,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-15 21:58:07,240 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:07,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:07,241 INFO L85 PathProgramCache]: Analyzing trace with hash 942519397, now seen corresponding path program 1 times [2021-12-15 21:58:07,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:07,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416021650] [2021-12-15 21:58:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:07,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:58:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:07,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:07,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416021650] [2021-12-15 21:58:07,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416021650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:07,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:07,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-15 21:58:07,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792732333] [2021-12-15 21:58:07,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:07,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 21:58:07,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 21:58:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-15 21:58:07,366 INFO L87 Difference]: Start difference. First operand 341 states and 481 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) [2021-12-15 21:58:07,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:07,594 INFO L93 Difference]: Finished difference Result 650 states and 927 transitions. [2021-12-15 21:58:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 21:58:07,594 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 [2021-12-15 21:58:07,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:07,597 INFO L225 Difference]: With dead ends: 650 [2021-12-15 21:58:07,597 INFO L226 Difference]: Without dead ends: 338 [2021-12-15 21:58:07,598 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 [2021-12-15 21:58:07,599 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 94 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:07,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1136 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-15 21:58:07,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 335. [2021-12-15 21:58:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 263 states have (on average 1.2547528517110267) internal successors, (330), 266 states have internal predecessors, (330), 51 states have call successors, (51), 18 states have call predecessors, (51), 20 states have return successors, (83), 50 states have call predecessors, (83), 48 states have call successors, (83) [2021-12-15 21:58:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 464 transitions. [2021-12-15 21:58:07,626 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 464 transitions. Word has length 57 [2021-12-15 21:58:07,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:07,627 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 464 transitions. [2021-12-15 21:58:07,627 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) [2021-12-15 21:58:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 464 transitions. [2021-12-15 21:58:07,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 21:58:07,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:07,630 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] [2021-12-15 21:58:07,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-15 21:58:07,630 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:07,631 INFO L85 PathProgramCache]: Analyzing trace with hash -146309345, now seen corresponding path program 1 times [2021-12-15 21:58:07,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:07,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219078596] [2021-12-15 21:58:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:07,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:58:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-15 21:58:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:07,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:07,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219078596] [2021-12-15 21:58:07,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219078596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:07,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:07,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-15 21:58:07,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377519764] [2021-12-15 21:58:07,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:07,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 21:58:07,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:07,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 21:58:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:58:07,749 INFO L87 Difference]: Start difference. First operand 335 states and 464 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) [2021-12-15 21:58:08,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:08,080 INFO L93 Difference]: Finished difference Result 607 states and 844 transitions. [2021-12-15 21:58:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:58:08,081 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 [2021-12-15 21:58:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:08,083 INFO L225 Difference]: With dead ends: 607 [2021-12-15 21:58:08,083 INFO L226 Difference]: Without dead ends: 312 [2021-12-15 21:58:08,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-12-15 21:58:08,086 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 183 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:08,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 944 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:08,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-12-15 21:58:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2021-12-15 21:58:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 238 states have (on average 1.2605042016806722) internal successors, (300), 244 states have internal predecessors, (300), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (63), 41 states have call predecessors, (63), 45 states have call successors, (63) [2021-12-15 21:58:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 411 transitions. [2021-12-15 21:58:08,113 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 411 transitions. Word has length 68 [2021-12-15 21:58:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:08,113 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 411 transitions. [2021-12-15 21:58:08,113 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) [2021-12-15 21:58:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 411 transitions. [2021-12-15 21:58:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 21:58:08,114 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:08,114 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] [2021-12-15 21:58:08,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-15 21:58:08,115 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:08,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1989043251, now seen corresponding path program 1 times [2021-12-15 21:58:08,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:08,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808987962] [2021-12-15 21:58:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:08,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:58:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-15 21:58:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:08,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:08,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808987962] [2021-12-15 21:58:08,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808987962] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:08,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:08,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-15 21:58:08,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278228891] [2021-12-15 21:58:08,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:08,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:58:08,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:58:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:58:08,324 INFO L87 Difference]: Start difference. First operand 304 states and 411 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) [2021-12-15 21:58:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:08,744 INFO L93 Difference]: Finished difference Result 348 states and 471 transitions. [2021-12-15 21:58:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 21:58:08,745 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 [2021-12-15 21:58:08,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:08,747 INFO L225 Difference]: With dead ends: 348 [2021-12-15 21:58:08,747 INFO L226 Difference]: Without dead ends: 327 [2021-12-15 21:58:08,748 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 [2021-12-15 21:58:08,748 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 139 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:08,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 2340 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:58:08,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-15 21:58:08,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2021-12-15 21:58:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 247 states have (on average 1.2510121457489878) internal successors, (309), 254 states have internal predecessors, (309), 48 states have call successors, (48), 18 states have call predecessors, (48), 19 states have return successors, (69), 42 states have call predecessors, (69), 45 states have call successors, (69) [2021-12-15 21:58:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 426 transitions. [2021-12-15 21:58:08,769 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 426 transitions. Word has length 73 [2021-12-15 21:58:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:08,769 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 426 transitions. [2021-12-15 21:58:08,781 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) [2021-12-15 21:58:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 426 transitions. [2021-12-15 21:58:08,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-15 21:58:08,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:08,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:08,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-15 21:58:08,782 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:08,783 INFO L85 PathProgramCache]: Analyzing trace with hash -182846632, now seen corresponding path program 1 times [2021-12-15 21:58:08,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:08,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944309785] [2021-12-15 21:58:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:08,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:58:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-15 21:58:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:08,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:08,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944309785] [2021-12-15 21:58:08,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944309785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:08,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:08,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-15 21:58:08,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144940632] [2021-12-15 21:58:08,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:08,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:58:08,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:08,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:58:08,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:58:08,971 INFO L87 Difference]: Start difference. First operand 315 states and 426 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) [2021-12-15 21:58:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:09,447 INFO L93 Difference]: Finished difference Result 346 states and 467 transitions. [2021-12-15 21:58:09,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 21:58:09,447 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 [2021-12-15 21:58:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:09,450 INFO L225 Difference]: With dead ends: 346 [2021-12-15 21:58:09,450 INFO L226 Difference]: Without dead ends: 325 [2021-12-15 21:58:09,450 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 [2021-12-15 21:58:09,451 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 105 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 2715 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:09,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 2715 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 21:58:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-15 21:58:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 302. [2021-12-15 21:58:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 237 states have (on average 1.261603375527426) internal successors, (299), 243 states have internal predecessors, (299), 47 states have call successors, (47), 18 states have call predecessors, (47), 17 states have return successors, (61), 40 states have call predecessors, (61), 44 states have call successors, (61) [2021-12-15 21:58:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 407 transitions. [2021-12-15 21:58:09,471 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 407 transitions. Word has length 74 [2021-12-15 21:58:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:09,471 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 407 transitions. [2021-12-15 21:58:09,471 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) [2021-12-15 21:58:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 407 transitions. [2021-12-15 21:58:09,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 21:58:09,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:09,472 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] [2021-12-15 21:58:09,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-15 21:58:09,473 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:09,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash -673237615, now seen corresponding path program 1 times [2021-12-15 21:58:09,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:09,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324483] [2021-12-15 21:58:09,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:09,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:09,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:09,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:09,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:09,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-15 21:58:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:09,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-15 21:58:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:09,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:09,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324483] [2021-12-15 21:58:09,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:09,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:09,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-15 21:58:09,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546232061] [2021-12-15 21:58:09,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:09,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 21:58:09,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:09,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 21:58:09,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-15 21:58:09,668 INFO L87 Difference]: Start difference. First operand 302 states and 407 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) [2021-12-15 21:58:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:10,289 INFO L93 Difference]: Finished difference Result 457 states and 680 transitions. [2021-12-15 21:58:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 21:58:10,290 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 [2021-12-15 21:58:10,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:10,293 INFO L225 Difference]: With dead ends: 457 [2021-12-15 21:58:10,293 INFO L226 Difference]: Without dead ends: 418 [2021-12-15 21:58:10,294 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 [2021-12-15 21:58:10,294 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 215 mSDsluCounter, 2266 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:10,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 2479 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 21:58:10,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-15 21:58:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 406. [2021-12-15 21:58:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 312 states have (on average 1.2628205128205128) internal successors, (394), 322 states have internal predecessors, (394), 74 states have call successors, (74), 18 states have call predecessors, (74), 19 states have return successors, (105), 65 states have call predecessors, (105), 70 states have call successors, (105) [2021-12-15 21:58:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 573 transitions. [2021-12-15 21:58:10,324 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 573 transitions. Word has length 82 [2021-12-15 21:58:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:10,324 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 573 transitions. [2021-12-15 21:58:10,324 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) [2021-12-15 21:58:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 573 transitions. [2021-12-15 21:58:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 21:58:10,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:10,325 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] [2021-12-15 21:58:10,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-15 21:58:10,326 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:10,326 INFO L85 PathProgramCache]: Analyzing trace with hash 716383564, now seen corresponding path program 1 times [2021-12-15 21:58:10,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:10,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992399867] [2021-12-15 21:58:10,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:10,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:10,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:10,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:10,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-15 21:58:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:10,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-15 21:58:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:10,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:10,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:10,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992399867] [2021-12-15 21:58:10,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992399867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:10,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:10,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-12-15 21:58:10,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667521599] [2021-12-15 21:58:10,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:10,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 21:58:10,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:10,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 21:58:10,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-12-15 21:58:10,526 INFO L87 Difference]: Start difference. First operand 406 states and 573 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) [2021-12-15 21:58:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:11,206 INFO L93 Difference]: Finished difference Result 544 states and 828 transitions. [2021-12-15 21:58:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 21:58:11,207 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 [2021-12-15 21:58:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:11,211 INFO L225 Difference]: With dead ends: 544 [2021-12-15 21:58:11,211 INFO L226 Difference]: Without dead ends: 505 [2021-12-15 21:58:11,212 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 [2021-12-15 21:58:11,212 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 200 mSDsluCounter, 2741 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:11,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2990 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 21:58:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-15 21:58:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 389. [2021-12-15 21:58:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 299 states have (on average 1.2709030100334449) internal successors, (380), 308 states have internal predecessors, (380), 72 states have call successors, (72), 18 states have call predecessors, (72), 17 states have return successors, (94), 62 states have call predecessors, (94), 68 states have call successors, (94) [2021-12-15 21:58:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 546 transitions. [2021-12-15 21:58:11,240 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 546 transitions. Word has length 83 [2021-12-15 21:58:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:11,240 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 546 transitions. [2021-12-15 21:58:11,240 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) [2021-12-15 21:58:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 546 transitions. [2021-12-15 21:58:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 21:58:11,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:11,241 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] [2021-12-15 21:58:11,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-15 21:58:11,242 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:11,242 INFO L85 PathProgramCache]: Analyzing trace with hash 971177342, now seen corresponding path program 1 times [2021-12-15 21:58:11,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:11,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33052506] [2021-12-15 21:58:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:11,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:11,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:58:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:11,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:11,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:11,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:11,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-15 21:58:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:11,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-15 21:58:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:11,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:11,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33052506] [2021-12-15 21:58:11,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33052506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:11,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:11,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-15 21:58:11,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291369812] [2021-12-15 21:58:11,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:11,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 21:58:11,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:11,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 21:58:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-15 21:58:11,411 INFO L87 Difference]: Start difference. First operand 389 states and 546 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) [2021-12-15 21:58:11,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:11,991 INFO L93 Difference]: Finished difference Result 770 states and 1094 transitions. [2021-12-15 21:58:11,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 21:58:11,992 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 [2021-12-15 21:58:11,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:11,997 INFO L225 Difference]: With dead ends: 770 [2021-12-15 21:58:11,997 INFO L226 Difference]: Without dead ends: 746 [2021-12-15 21:58:11,998 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 [2021-12-15 21:58:11,998 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 298 mSDsluCounter, 2135 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:11,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 2361 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 21:58:11,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-15 21:58:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 703. [2021-12-15 21:58:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 535 states have (on average 1.2654205607476636) internal successors, (677), 552 states have internal predecessors, (677), 135 states have call successors, (135), 32 states have call predecessors, (135), 32 states have return successors, (183), 118 states have call predecessors, (183), 131 states have call successors, (183) [2021-12-15 21:58:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 995 transitions. [2021-12-15 21:58:12,060 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 995 transitions. Word has length 84 [2021-12-15 21:58:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:12,060 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 995 transitions. [2021-12-15 21:58:12,060 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) [2021-12-15 21:58:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 995 transitions. [2021-12-15 21:58:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 21:58:12,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:12,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:58:12,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-15 21:58:12,062 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:12,063 INFO L85 PathProgramCache]: Analyzing trace with hash -171325124, now seen corresponding path program 1 times [2021-12-15 21:58:12,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:12,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699145213] [2021-12-15 21:58:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:12,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:12,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-15 21:58:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:12,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:12,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:12,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:12,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-15 21:58:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:12,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-15 21:58:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:12,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:12,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699145213] [2021-12-15 21:58:12,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699145213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:12,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:12,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-15 21:58:12,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301537350] [2021-12-15 21:58:12,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:12,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-15 21:58:12,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-15 21:58:12,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-12-15 21:58:12,235 INFO L87 Difference]: Start difference. First operand 703 states and 995 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) [2021-12-15 21:58:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:12,888 INFO L93 Difference]: Finished difference Result 767 states and 1087 transitions. [2021-12-15 21:58:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 21:58:12,888 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 [2021-12-15 21:58:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:12,894 INFO L225 Difference]: With dead ends: 767 [2021-12-15 21:58:12,894 INFO L226 Difference]: Without dead ends: 739 [2021-12-15 21:58:12,895 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 [2021-12-15 21:58:12,896 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 306 mSDsluCounter, 2944 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:12,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 3301 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 21:58:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-12-15 21:58:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 382. [2021-12-15 21:58:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 294 states have (on average 1.272108843537415) internal successors, (374), 303 states have internal predecessors, (374), 70 states have call successors, (70), 18 states have call predecessors, (70), 17 states have return successors, (92), 60 states have call predecessors, (92), 66 states have call successors, (92) [2021-12-15 21:58:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 536 transitions. [2021-12-15 21:58:12,945 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 536 transitions. Word has length 84 [2021-12-15 21:58:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:12,946 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 536 transitions. [2021-12-15 21:58:12,946 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) [2021-12-15 21:58:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 536 transitions. [2021-12-15 21:58:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 21:58:12,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:12,948 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] [2021-12-15 21:58:12,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-15 21:58:12,948 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1715684878, now seen corresponding path program 1 times [2021-12-15 21:58:12,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:12,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885807888] [2021-12-15 21:58:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:12,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:13,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:13,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:13,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-15 21:58:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:13,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-15 21:58:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:13,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-15 21:58:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:13,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:13,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885807888] [2021-12-15 21:58:13,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885807888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:13,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:13,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-15 21:58:13,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971726193] [2021-12-15 21:58:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:13,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:58:13,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:58:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:58:13,146 INFO L87 Difference]: Start difference. First operand 382 states and 536 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) [2021-12-15 21:58:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:14,030 INFO L93 Difference]: Finished difference Result 772 states and 1092 transitions. [2021-12-15 21:58:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-15 21:58:14,035 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 [2021-12-15 21:58:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:14,040 INFO L225 Difference]: With dead ends: 772 [2021-12-15 21:58:14,040 INFO L226 Difference]: Without dead ends: 725 [2021-12-15 21:58:14,041 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 [2021-12-15 21:58:14,042 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 539 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:14,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 2406 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 21:58:14,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-15 21:58:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 701. [2021-12-15 21:58:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 536 states have (on average 1.2388059701492538) internal successors, (664), 552 states have internal predecessors, (664), 132 states have call successors, (132), 33 states have call predecessors, (132), 32 states have return successors, (175), 115 states have call predecessors, (175), 127 states have call successors, (175) [2021-12-15 21:58:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 971 transitions. [2021-12-15 21:58:14,090 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 971 transitions. Word has length 93 [2021-12-15 21:58:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:14,090 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 971 transitions. [2021-12-15 21:58:14,091 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) [2021-12-15 21:58:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 971 transitions. [2021-12-15 21:58:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 21:58:14,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:14,092 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] [2021-12-15 21:58:14,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-15 21:58:14,093 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash 327002288, now seen corresponding path program 1 times [2021-12-15 21:58:14,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:14,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3496303] [2021-12-15 21:58:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:14,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:14,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:14,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-15 21:58:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-15 21:58:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 21:58:14,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:14,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3496303] [2021-12-15 21:58:14,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3496303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:14,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:14,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-15 21:58:14,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55994324] [2021-12-15 21:58:14,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:14,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:58:14,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:14,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:58:14,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:58:14,229 INFO L87 Difference]: Start difference. First operand 701 states and 971 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) [2021-12-15 21:58:14,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:14,572 INFO L93 Difference]: Finished difference Result 1523 states and 2174 transitions. [2021-12-15 21:58:14,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:58:14,573 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 [2021-12-15 21:58:14,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:14,579 INFO L225 Difference]: With dead ends: 1523 [2021-12-15 21:58:14,579 INFO L226 Difference]: Without dead ends: 985 [2021-12-15 21:58:14,581 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 [2021-12-15 21:58:14,582 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 193 mSDsluCounter, 1325 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:14,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1595 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:14,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-12-15 21:58:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 677. [2021-12-15 21:58:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 520 states have (on average 1.2153846153846153) internal successors, (632), 532 states have internal predecessors, (632), 124 states have call successors, (124), 33 states have call predecessors, (124), 32 states have return successors, (163), 111 states have call predecessors, (163), 119 states have call successors, (163) [2021-12-15 21:58:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 919 transitions. [2021-12-15 21:58:14,631 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 919 transitions. Word has length 95 [2021-12-15 21:58:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:14,631 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 919 transitions. [2021-12-15 21:58:14,632 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) [2021-12-15 21:58:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 919 transitions. [2021-12-15 21:58:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 21:58:14,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:14,633 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] [2021-12-15 21:58:14,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-15 21:58:14,634 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:14,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1808548852, now seen corresponding path program 1 times [2021-12-15 21:58:14,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:14,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081915583] [2021-12-15 21:58:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:14,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-15 21:58:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-15 21:58:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-15 21:58:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:58:14,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:14,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081915583] [2021-12-15 21:58:14,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081915583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:14,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:14,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-15 21:58:14,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255640024] [2021-12-15 21:58:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:14,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:58:14,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:58:14,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:58:14,823 INFO L87 Difference]: Start difference. First operand 677 states and 919 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) [2021-12-15 21:58:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:15,815 INFO L93 Difference]: Finished difference Result 707 states and 964 transitions. [2021-12-15 21:58:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-15 21:58:15,815 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 [2021-12-15 21:58:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:15,819 INFO L225 Difference]: With dead ends: 707 [2021-12-15 21:58:15,820 INFO L226 Difference]: Without dead ends: 658 [2021-12-15 21:58:15,820 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 [2021-12-15 21:58:15,821 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 372 mSDsluCounter, 2993 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 3359 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:15,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 3359 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 21:58:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-15 21:58:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 244. [2021-12-15 21:58:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 190 states have (on average 1.1526315789473685) internal successors, (219), 194 states have internal predecessors, (219), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (47), 33 states have call predecessors, (47), 35 states have call successors, (47) [2021-12-15 21:58:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 304 transitions. [2021-12-15 21:58:15,845 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 304 transitions. Word has length 93 [2021-12-15 21:58:15,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:15,845 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 304 transitions. [2021-12-15 21:58:15,845 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) [2021-12-15 21:58:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 304 transitions. [2021-12-15 21:58:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 21:58:15,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:15,847 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] [2021-12-15 21:58:15,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-15 21:58:15,847 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:15,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash 46403579, now seen corresponding path program 1 times [2021-12-15 21:58:15,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:15,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167953568] [2021-12-15 21:58:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:15,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-15 21:58:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-15 21:58:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-15 21:58:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-15 21:58:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 21:58:15,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:15,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167953568] [2021-12-15 21:58:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167953568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:58:15,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954478027] [2021-12-15 21:58:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:15,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:58:15,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:58:15,975 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) [2021-12-15 21:58:16,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:58:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 21:58:16,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:58:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 21:58:16,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 21:58:16,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954478027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:16,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 21:58:16,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2021-12-15 21:58:16,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631607978] [2021-12-15 21:58:16,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:16,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 21:58:16,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 21:58:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-15 21:58:16,498 INFO L87 Difference]: Start difference. First operand 244 states and 304 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) [2021-12-15 21:58:16,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:16,576 INFO L93 Difference]: Finished difference Result 452 states and 566 transitions. [2021-12-15 21:58:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:58:16,576 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 [2021-12-15 21:58:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:16,578 INFO L225 Difference]: With dead ends: 452 [2021-12-15 21:58:16,578 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 21:58:16,579 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 [2021-12-15 21:58:16,579 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 [2021-12-15 21:58:16,580 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] [2021-12-15 21:58:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 21:58:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 260. [2021-12-15 21:58:16,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 204 states have (on average 1.142156862745098) internal successors, (233), 209 states have internal predecessors, (233), 38 states have call successors, (38), 16 states have call predecessors, (38), 17 states have return successors, (55), 34 states have call predecessors, (55), 35 states have call successors, (55) [2021-12-15 21:58:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 326 transitions. [2021-12-15 21:58:16,641 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 326 transitions. Word has length 133 [2021-12-15 21:58:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:16,641 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 326 transitions. [2021-12-15 21:58:16,641 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) [2021-12-15 21:58:16,641 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 326 transitions. [2021-12-15 21:58:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-15 21:58:16,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:16,643 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] [2021-12-15 21:58:16,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:58:16,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:58:16,874 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1067504510, now seen corresponding path program 1 times [2021-12-15 21:58:16,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:16,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898726993] [2021-12-15 21:58:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:16,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-15 21:58:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-15 21:58:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-15 21:58:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:16,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-15 21:58:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 21:58:17,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898726993] [2021-12-15 21:58:17,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898726993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:17,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:17,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-15 21:58:17,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997736073] [2021-12-15 21:58:17,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:17,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:58:17,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:58:17,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:58:17,016 INFO L87 Difference]: Start difference. First operand 260 states and 326 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) [2021-12-15 21:58:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:17,350 INFO L93 Difference]: Finished difference Result 472 states and 583 transitions. [2021-12-15 21:58:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:58:17,351 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 [2021-12-15 21:58:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:17,353 INFO L225 Difference]: With dead ends: 472 [2021-12-15 21:58:17,353 INFO L226 Difference]: Without dead ends: 300 [2021-12-15 21:58:17,354 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 [2021-12-15 21:58:17,354 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 145 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:17,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1105 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:58:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-15 21:58:17,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 253. [2021-12-15 21:58:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 199 states have (on average 1.1256281407035176) internal successors, (224), 203 states have internal predecessors, (224), 36 states have call successors, (36), 16 states have call predecessors, (36), 17 states have return successors, (51), 33 states have call predecessors, (51), 33 states have call successors, (51) [2021-12-15 21:58:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 311 transitions. [2021-12-15 21:58:17,375 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 311 transitions. Word has length 134 [2021-12-15 21:58:17,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:17,376 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 311 transitions. [2021-12-15 21:58:17,376 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) [2021-12-15 21:58:17,376 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 311 transitions. [2021-12-15 21:58:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-15 21:58:17,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:17,378 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] [2021-12-15 21:58:17,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-15 21:58:17,379 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:17,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1031777441, now seen corresponding path program 1 times [2021-12-15 21:58:17,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:17,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228715224] [2021-12-15 21:58:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:17,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-15 21:58:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-15 21:58:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-15 21:58:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-15 21:58:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-15 21:58:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-15 21:58:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-15 21:58:17,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228715224] [2021-12-15 21:58:17,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228715224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:17,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:17,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-15 21:58:17,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502092029] [2021-12-15 21:58:17,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:17,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:58:17,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:58:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:58:17,544 INFO L87 Difference]: Start difference. First operand 253 states and 311 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) [2021-12-15 21:58:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:17,882 INFO L93 Difference]: Finished difference Result 322 states and 392 transitions. [2021-12-15 21:58:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:58:17,882 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 [2021-12-15 21:58:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:17,884 INFO L225 Difference]: With dead ends: 322 [2021-12-15 21:58:17,884 INFO L226 Difference]: Without dead ends: 255 [2021-12-15 21:58:17,884 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 [2021-12-15 21:58:17,885 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 123 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:17,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 1036 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 21:58:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-15 21:58:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 228. [2021-12-15 21:58:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 181 states have (on average 1.1104972375690607) internal successors, (201), 184 states have internal predecessors, (201), 31 states have call successors, (31), 12 states have call predecessors, (31), 15 states have return successors, (47), 31 states have call predecessors, (47), 29 states have call successors, (47) [2021-12-15 21:58:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 279 transitions. [2021-12-15 21:58:17,902 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 279 transitions. Word has length 170 [2021-12-15 21:58:17,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:17,903 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 279 transitions. [2021-12-15 21:58:17,903 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) [2021-12-15 21:58:17,903 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 279 transitions. [2021-12-15 21:58:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-15 21:58:17,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:58:17,905 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] [2021-12-15 21:58:17,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-15 21:58:17,906 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:58:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:58:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1337713774, now seen corresponding path program 1 times [2021-12-15 21:58:17,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:58:17,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481398618] [2021-12-15 21:58:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:58:17,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:58:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-15 21:58:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-15 21:58:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:17,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-15 21:58:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-15 21:58:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-15 21:58:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-15 21:58:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-15 21:58:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-15 21:58:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-15 21:58:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-15 21:58:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:58:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-15 21:58:18,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:58:18,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481398618] [2021-12-15 21:58:18,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481398618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:58:18,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:58:18,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-15 21:58:18,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518495439] [2021-12-15 21:58:18,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:58:18,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:58:18,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:58:18,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:58:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:58:18,079 INFO L87 Difference]: Start difference. First operand 228 states and 279 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) [2021-12-15 21:58:18,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:58:18,342 INFO L93 Difference]: Finished difference Result 234 states and 288 transitions. [2021-12-15 21:58:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:58:18,343 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 [2021-12-15 21:58:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:58:18,343 INFO L225 Difference]: With dead ends: 234 [2021-12-15 21:58:18,343 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 21:58:18,344 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 [2021-12-15 21:58:18,345 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 122 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:58:18,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 721 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:58:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 21:58:18,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 21:58:18,347 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) [2021-12-15 21:58:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 21:58:18,347 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2021-12-15 21:58:18,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:58:18,347 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 21:58:18,347 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) [2021-12-15 21:58:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 21:58:18,348 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 21:58:18,350 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 21:58:18,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-15 21:58:18,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.