./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 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/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 17:09:54,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 17:09:54,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 17:09:54,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 17:09:54,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 17:09:54,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 17:09:54,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 17:09:54,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 17:09:54,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 17:09:54,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 17:09:54,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 17:09:54,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 17:09:54,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 17:09:54,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 17:09:54,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 17:09:54,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 17:09:54,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 17:09:54,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 17:09:54,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 17:09:54,848 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 17:09:54,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 17:09:54,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 17:09:54,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 17:09:54,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 17:09:54,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 17:09:54,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 17:09:54,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 17:09:54,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 17:09:54,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 17:09:54,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 17:09:54,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 17:09:54,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 17:09:54,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 17:09:54,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 17:09:54,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 17:09:54,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 17:09:54,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 17:09:54,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 17:09:54,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 17:09:54,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 17:09:54,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 17:09:54,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 17:09:54,885 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 17:09:54,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 17:09:54,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 17:09:54,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 17:09:54,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 17:09:54,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 17:09:54,886 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 17:09:54,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 17:09:54,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 17:09:54,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 17:09:54,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 17:09:54,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 17:09:54,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 17:09:54,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 17:09:54,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 17:09:54,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 17:09:54,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 17:09:54,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 17:09:54,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 17:09:54,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 17:09:54,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 17:09:54,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 17:09:54,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 17:09:54,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 17:09:54,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 17:09:54,890 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 17:09:54,890 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 17:09:54,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 17:09:54,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 17:09:54,890 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e [2021-11-06 17:09:55,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 17:09:55,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 17:09:55,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 17:09:55,132 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 17:09:55,133 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 17:09:55,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-11-06 17:09:55,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af7a7a56c/cef12bff0e8a469d90ac723e392cd735/FLAGbe5691be1 [2021-11-06 17:09:55,798 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 17:09:55,799 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-11-06 17:09:55,837 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af7a7a56c/cef12bff0e8a469d90ac723e392cd735/FLAGbe5691be1 [2021-11-06 17:09:55,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af7a7a56c/cef12bff0e8a469d90ac723e392cd735 [2021-11-06 17:09:55,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 17:09:55,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 17:09:55,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 17:09:55,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 17:09:55,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 17:09:55,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 05:09:55" (1/1) ... [2021-11-06 17:09:55,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ef497b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:55, skipping insertion in model container [2021-11-06 17:09:55,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 05:09:55" (1/1) ... [2021-11-06 17:09:55,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 17:09:56,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 17:09:57,483 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2021-11-06 17:09:57,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 17:09:57,558 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 17:09:57,788 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2021-11-06 17:09:57,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 17:09:57,844 INFO L208 MainTranslator]: Completed translation [2021-11-06 17:09:57,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57 WrapperNode [2021-11-06 17:09:57,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 17:09:57,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 17:09:57,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 17:09:57,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 17:09:57,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:57,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:58,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 17:09:58,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 17:09:58,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 17:09:58,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 17:09:58,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:58,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:58,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:58,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:59,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:59,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:59,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:59,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 17:09:59,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 17:09:59,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 17:09:59,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 17:09:59,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (1/1) ... [2021-11-06 17:09:59,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 17:09:59,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:09:59,693 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) [2021-11-06 17:09:59,771 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 [2021-11-06 17:09:59,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 17:09:59,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 17:09:59,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 17:09:59,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 17:09:59,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 17:09:59,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 17:09:59,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 17:09:59,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 17:09:59,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 17:09:59,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 17:09:59,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 17:10:57,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 17:10:57,368 INFO L299 CfgBuilder]: Removed 4694 assume(true) statements. [2021-11-06 17:10:57,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 05:10:57 BoogieIcfgContainer [2021-11-06 17:10:57,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 17:10:57,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 17:10:57,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 17:10:57,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 17:10:57,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 05:09:55" (1/3) ... [2021-11-06 17:10:57,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eee532d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 05:10:57, skipping insertion in model container [2021-11-06 17:10:57,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:09:57" (2/3) ... [2021-11-06 17:10:57,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eee532d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 05:10:57, skipping insertion in model container [2021-11-06 17:10:57,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 05:10:57" (3/3) ... [2021-11-06 17:10:57,378 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2021-11-06 17:10:57,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 17:10:57,382 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-06 17:10:57,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 17:10:57,426 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 [2021-11-06 17:10:57,427 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-06 17:10:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 4341 states, 4331 states have (on average 1.3876702839990764) internal successors, (6010), 4340 states have internal predecessors, (6010), 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) [2021-11-06 17:10:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-06 17:10:57,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:10:57,480 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:10:57,480 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:10:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:10:57,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1080722524, now seen corresponding path program 1 times [2021-11-06 17:10:57,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:10:57,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828069584] [2021-11-06 17:10:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:10:57,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:10:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:10:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:10:57,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:10:57,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828069584] [2021-11-06 17:10:57,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828069584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:10:57,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:10:57,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 17:10:57,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353509276] [2021-11-06 17:10:57,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 17:10:57,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:10:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 17:10:58,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 17:10:58,018 INFO L87 Difference]: Start difference. First operand has 4341 states, 4331 states have (on average 1.3876702839990764) internal successors, (6010), 4340 states have internal predecessors, (6010), 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) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) [2021-11-06 17:10:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:10:58,145 INFO L93 Difference]: Finished difference Result 8678 states and 12015 transitions. [2021-11-06 17:10:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 17:10:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) Word has length 22 [2021-11-06 17:10:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:10:58,174 INFO L225 Difference]: With dead ends: 8678 [2021-11-06 17:10:58,174 INFO L226 Difference]: Without dead ends: 4326 [2021-11-06 17:10:58,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 17:10:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-11-06 17:10:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4326. [2021-11-06 17:10:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4317 states have (on average 1.3808200138985407) internal successors, (5961), 4325 states have internal predecessors, (5961), 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) [2021-11-06 17:10:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 5961 transitions. [2021-11-06 17:10:58,325 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 5961 transitions. Word has length 22 [2021-11-06 17:10:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:10:58,326 INFO L470 AbstractCegarLoop]: Abstraction has 4326 states and 5961 transitions. [2021-11-06 17:10:58,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) [2021-11-06 17:10:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 5961 transitions. [2021-11-06 17:10:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-06 17:10:58,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:10:58,327 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:10:58,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 17:10:58,329 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:10:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:10:58,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1187020318, now seen corresponding path program 1 times [2021-11-06 17:10:58,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:10:58,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389142450] [2021-11-06 17:10:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:10:58,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:10:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:10:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:10:58,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:10:58,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389142450] [2021-11-06 17:10:58,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389142450] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:10:58,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:10:58,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:10:58,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828782786] [2021-11-06 17:10:58,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:10:58,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:10:58,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:10:58,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:10:58,786 INFO L87 Difference]: Start difference. First operand 4326 states and 5961 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-11-06 17:10:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:10:59,203 INFO L93 Difference]: Finished difference Result 12528 states and 17341 transitions. [2021-11-06 17:10:59,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:10:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) Word has length 22 [2021-11-06 17:10:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:10:59,233 INFO L225 Difference]: With dead ends: 12528 [2021-11-06 17:10:59,234 INFO L226 Difference]: Without dead ends: 8217 [2021-11-06 17:10:59,246 INFO L786 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 [2021-11-06 17:10:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8217 states. [2021-11-06 17:10:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8217 to 8200. [2021-11-06 17:10:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8200 states, 8191 states have (on average 1.3899401782444145) internal successors, (11385), 8199 states have internal predecessors, (11385), 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) [2021-11-06 17:10:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8200 states to 8200 states and 11385 transitions. [2021-11-06 17:10:59,444 INFO L78 Accepts]: Start accepts. Automaton has 8200 states and 11385 transitions. Word has length 22 [2021-11-06 17:10:59,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:10:59,445 INFO L470 AbstractCegarLoop]: Abstraction has 8200 states and 11385 transitions. [2021-11-06 17:10:59,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-11-06 17:10:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8200 states and 11385 transitions. [2021-11-06 17:10:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-06 17:10:59,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:10:59,453 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 17:10:59,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 17:10:59,454 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:10:59,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:10:59,454 INFO L85 PathProgramCache]: Analyzing trace with hash 567191233, now seen corresponding path program 1 times [2021-11-06 17:10:59,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:10:59,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092296749] [2021-11-06 17:10:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:10:59,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:10:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:10:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:10:59,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:10:59,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092296749] [2021-11-06 17:10:59,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092296749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:10:59,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:10:59,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:10:59,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783333724] [2021-11-06 17:10:59,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:10:59,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:10:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:10:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:10:59,738 INFO L87 Difference]: Start difference. First operand 8200 states and 11385 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-11-06 17:11:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:02,176 INFO L93 Difference]: Finished difference Result 16386 states and 22756 transitions. [2021-11-06 17:11:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:11:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) Word has length 40 [2021-11-06 17:11:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:02,205 INFO L225 Difference]: With dead ends: 16386 [2021-11-06 17:11:02,206 INFO L226 Difference]: Without dead ends: 8200 [2021-11-06 17:11:02,221 INFO L786 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 [2021-11-06 17:11:02,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8200 states. [2021-11-06 17:11:02,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8200 to 8200. [2021-11-06 17:11:02,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8200 states, 8191 states have (on average 1.389818093028934) internal successors, (11384), 8199 states have internal predecessors, (11384), 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) [2021-11-06 17:11:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8200 states to 8200 states and 11384 transitions. [2021-11-06 17:11:02,437 INFO L78 Accepts]: Start accepts. Automaton has 8200 states and 11384 transitions. Word has length 40 [2021-11-06 17:11:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:02,437 INFO L470 AbstractCegarLoop]: Abstraction has 8200 states and 11384 transitions. [2021-11-06 17:11:02,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2021-11-06 17:11:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 8200 states and 11384 transitions. [2021-11-06 17:11:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-06 17:11:02,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:02,439 INFO L513 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] [2021-11-06 17:11:02,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 17:11:02,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash -93621830, now seen corresponding path program 1 times [2021-11-06 17:11:02,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:02,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225982132] [2021-11-06 17:11:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:02,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:11:02,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:02,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225982132] [2021-11-06 17:11:02,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225982132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:02,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:02,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:11:02,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550525210] [2021-11-06 17:11:02,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:11:02,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:02,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:11:02,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:11:02,705 INFO L87 Difference]: Start difference. First operand 8200 states and 11384 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-06 17:11:03,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:03,442 INFO L93 Difference]: Finished difference Result 23706 states and 32782 transitions. [2021-11-06 17:11:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:11:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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) Word has length 41 [2021-11-06 17:11:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:03,485 INFO L225 Difference]: With dead ends: 23706 [2021-11-06 17:11:03,485 INFO L226 Difference]: Without dead ends: 15521 [2021-11-06 17:11:03,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15521 states. [2021-11-06 17:11:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15521 to 8710. [2021-11-06 17:11:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 8701 states have (on average 1.3828295598207103) internal successors, (12032), 8709 states have internal predecessors, (12032), 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) [2021-11-06 17:11:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 12032 transitions. [2021-11-06 17:11:03,745 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 12032 transitions. Word has length 41 [2021-11-06 17:11:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:03,745 INFO L470 AbstractCegarLoop]: Abstraction has 8710 states and 12032 transitions. [2021-11-06 17:11:03,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-11-06 17:11:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 12032 transitions. [2021-11-06 17:11:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-06 17:11:03,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:03,747 INFO L513 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] [2021-11-06 17:11:03,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 17:11:03,748 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:03,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:03,748 INFO L85 PathProgramCache]: Analyzing trace with hash -893390283, now seen corresponding path program 1 times [2021-11-06 17:11:03,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:03,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016699638] [2021-11-06 17:11:03,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:03,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:11:03,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:03,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016699638] [2021-11-06 17:11:03,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016699638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:03,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:03,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:11:03,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52818458] [2021-11-06 17:11:03,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:11:03,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:03,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:11:03,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:11:03,992 INFO L87 Difference]: Start difference. First operand 8710 states and 12032 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-11-06 17:11:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:04,641 INFO L93 Difference]: Finished difference Result 26254 states and 36022 transitions. [2021-11-06 17:11:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:11:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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) Word has length 42 [2021-11-06 17:11:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:04,680 INFO L225 Difference]: With dead ends: 26254 [2021-11-06 17:11:04,681 INFO L226 Difference]: Without dead ends: 17559 [2021-11-06 17:11:04,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:04,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17559 states. [2021-11-06 17:11:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17559 to 15477. [2021-11-06 17:11:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15477 states, 15468 states have (on average 1.3808507887251098) internal successors, (21359), 15476 states have internal predecessors, (21359), 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) [2021-11-06 17:11:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15477 states to 15477 states and 21359 transitions. [2021-11-06 17:11:05,013 INFO L78 Accepts]: Start accepts. Automaton has 15477 states and 21359 transitions. Word has length 42 [2021-11-06 17:11:05,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:05,015 INFO L470 AbstractCegarLoop]: Abstraction has 15477 states and 21359 transitions. [2021-11-06 17:11:05,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-11-06 17:11:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 15477 states and 21359 transitions. [2021-11-06 17:11:05,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-06 17:11:05,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:05,016 INFO L513 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] [2021-11-06 17:11:05,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 17:11:05,017 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:05,017 INFO L85 PathProgramCache]: Analyzing trace with hash 83594758, now seen corresponding path program 1 times [2021-11-06 17:11:05,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:05,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520583933] [2021-11-06 17:11:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:05,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:11:05,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:05,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520583933] [2021-11-06 17:11:05,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520583933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:05,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:05,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:11:05,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458745586] [2021-11-06 17:11:05,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:11:05,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:11:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:11:05,419 INFO L87 Difference]: Start difference. First operand 15477 states and 21359 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-06 17:11:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:06,177 INFO L93 Difference]: Finished difference Result 46703 states and 63941 transitions. [2021-11-06 17:11:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:11:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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) Word has length 43 [2021-11-06 17:11:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:06,268 INFO L225 Difference]: With dead ends: 46703 [2021-11-06 17:11:06,269 INFO L226 Difference]: Without dead ends: 31241 [2021-11-06 17:11:06,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31241 states. [2021-11-06 17:11:06,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31241 to 27104. [2021-11-06 17:11:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27104 states, 27095 states have (on average 1.3780771360029527) internal successors, (37339), 27103 states have internal predecessors, (37339), 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) [2021-11-06 17:11:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27104 states to 27104 states and 37339 transitions. [2021-11-06 17:11:06,854 INFO L78 Accepts]: Start accepts. Automaton has 27104 states and 37339 transitions. Word has length 43 [2021-11-06 17:11:06,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:06,854 INFO L470 AbstractCegarLoop]: Abstraction has 27104 states and 37339 transitions. [2021-11-06 17:11:06,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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) [2021-11-06 17:11:06,855 INFO L276 IsEmpty]: Start isEmpty. Operand 27104 states and 37339 transitions. [2021-11-06 17:11:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-06 17:11:06,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:06,856 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:11:06,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 17:11:06,856 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash 307210307, now seen corresponding path program 1 times [2021-11-06 17:11:06,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:06,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442331762] [2021-11-06 17:11:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:06,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:11:07,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:07,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442331762] [2021-11-06 17:11:07,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442331762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:07,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:07,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:11:07,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416446172] [2021-11-06 17:11:07,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:11:07,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:07,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:11:07,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:11:07,172 INFO L87 Difference]: Start difference. First operand 27104 states and 37339 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-11-06 17:11:08,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:08,545 INFO L93 Difference]: Finished difference Result 81872 states and 111737 transitions. [2021-11-06 17:11:08,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:11:08,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 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) Word has length 44 [2021-11-06 17:11:08,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:08,661 INFO L225 Difference]: With dead ends: 81872 [2021-11-06 17:11:08,661 INFO L226 Difference]: Without dead ends: 54783 [2021-11-06 17:11:08,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54783 states. [2021-11-06 17:11:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54783 to 46543. [2021-11-06 17:11:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46543 states, 46534 states have (on average 1.3742424893626166) internal successors, (63949), 46542 states have internal predecessors, (63949), 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) [2021-11-06 17:11:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46543 states to 46543 states and 63949 transitions. [2021-11-06 17:11:09,831 INFO L78 Accepts]: Start accepts. Automaton has 46543 states and 63949 transitions. Word has length 44 [2021-11-06 17:11:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:09,831 INFO L470 AbstractCegarLoop]: Abstraction has 46543 states and 63949 transitions. [2021-11-06 17:11:09,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-11-06 17:11:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 46543 states and 63949 transitions. [2021-11-06 17:11:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-06 17:11:09,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:09,834 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 17:11:09,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 17:11:09,834 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:09,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1998294810, now seen corresponding path program 1 times [2021-11-06 17:11:09,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:09,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116930411] [2021-11-06 17:11:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:09,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 17:11:10,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:10,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116930411] [2021-11-06 17:11:10,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116930411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:10,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:10,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 17:11:10,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170802107] [2021-11-06 17:11:10,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:11:10,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:11:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:11:10,093 INFO L87 Difference]: Start difference. First operand 46543 states and 63949 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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) [2021-11-06 17:11:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:10,639 INFO L93 Difference]: Finished difference Result 46543 states and 63949 transitions. [2021-11-06 17:11:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:11:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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) Word has length 44 [2021-11-06 17:11:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:10,710 INFO L225 Difference]: With dead ends: 46543 [2021-11-06 17:11:10,710 INFO L226 Difference]: Without dead ends: 46541 [2021-11-06 17:11:10,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:11:10,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46541 states. [2021-11-06 17:11:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46541 to 46541. [2021-11-06 17:11:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46541 states, 46533 states have (on average 1.373906689876002) internal successors, (63932), 46540 states have internal predecessors, (63932), 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) [2021-11-06 17:11:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46541 states to 46541 states and 63932 transitions. [2021-11-06 17:11:11,753 INFO L78 Accepts]: Start accepts. Automaton has 46541 states and 63932 transitions. Word has length 44 [2021-11-06 17:11:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:11,753 INFO L470 AbstractCegarLoop]: Abstraction has 46541 states and 63932 transitions. [2021-11-06 17:11:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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) [2021-11-06 17:11:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 46541 states and 63932 transitions. [2021-11-06 17:11:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-06 17:11:11,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:11,756 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 17:11:11,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 17:11:11,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash 750563296, now seen corresponding path program 1 times [2021-11-06 17:11:11,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:11,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353649136] [2021-11-06 17:11:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:11,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 17:11:12,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:12,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353649136] [2021-11-06 17:11:12,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353649136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:12,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:12,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 17:11:12,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817548436] [2021-11-06 17:11:12,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:11:12,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:11:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:12,098 INFO L87 Difference]: Start difference. First operand 46541 states and 63932 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-06 17:11:14,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:14,358 INFO L93 Difference]: Finished difference Result 128501 states and 175688 transitions. [2021-11-06 17:11:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 17:11:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) Word has length 49 [2021-11-06 17:11:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:14,493 INFO L225 Difference]: With dead ends: 128501 [2021-11-06 17:11:14,495 INFO L226 Difference]: Without dead ends: 81975 [2021-11-06 17:11:14,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 17:11:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81975 states. [2021-11-06 17:11:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81975 to 46621. [2021-11-06 17:11:15,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46621 states, 46613 states have (on average 1.3732649690000645) internal successors, (64012), 46620 states have internal predecessors, (64012), 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) [2021-11-06 17:11:15,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46621 states to 46621 states and 64012 transitions. [2021-11-06 17:11:15,617 INFO L78 Accepts]: Start accepts. Automaton has 46621 states and 64012 transitions. Word has length 49 [2021-11-06 17:11:15,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:15,617 INFO L470 AbstractCegarLoop]: Abstraction has 46621 states and 64012 transitions. [2021-11-06 17:11:15,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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) [2021-11-06 17:11:15,617 INFO L276 IsEmpty]: Start isEmpty. Operand 46621 states and 64012 transitions. [2021-11-06 17:11:15,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-06 17:11:15,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:15,619 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:11:15,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 17:11:15,620 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1159627793, now seen corresponding path program 1 times [2021-11-06 17:11:15,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:15,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107145169] [2021-11-06 17:11:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:15,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 17:11:16,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:16,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107145169] [2021-11-06 17:11:16,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107145169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:16,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:16,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:11:16,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222541731] [2021-11-06 17:11:16,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:11:16,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:16,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:11:16,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:11:16,082 INFO L87 Difference]: Start difference. First operand 46621 states and 64012 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2021-11-06 17:11:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:17,246 INFO L93 Difference]: Finished difference Result 93323 states and 128121 transitions. [2021-11-06 17:11:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:11:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) Word has length 120 [2021-11-06 17:11:17,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:17,320 INFO L225 Difference]: With dead ends: 93323 [2021-11-06 17:11:17,320 INFO L226 Difference]: Without dead ends: 46717 [2021-11-06 17:11:17,369 INFO L786 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 [2021-11-06 17:11:17,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46717 states. [2021-11-06 17:11:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46717 to 46637. [2021-11-06 17:11:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46637 states, 46629 states have (on average 1.3731368890604558) internal successors, (64028), 46636 states have internal predecessors, (64028), 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) [2021-11-06 17:11:18,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46637 states to 46637 states and 64028 transitions. [2021-11-06 17:11:18,364 INFO L78 Accepts]: Start accepts. Automaton has 46637 states and 64028 transitions. Word has length 120 [2021-11-06 17:11:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:18,364 INFO L470 AbstractCegarLoop]: Abstraction has 46637 states and 64028 transitions. [2021-11-06 17:11:18,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2021-11-06 17:11:18,365 INFO L276 IsEmpty]: Start isEmpty. Operand 46637 states and 64028 transitions. [2021-11-06 17:11:18,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-06 17:11:18,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:18,367 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:11:18,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 17:11:18,367 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash 160933319, now seen corresponding path program 1 times [2021-11-06 17:11:18,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:18,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410212343] [2021-11-06 17:11:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:18,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 17:11:18,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:18,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410212343] [2021-11-06 17:11:18,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410212343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:11:18,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959596951] [2021-11-06 17:11:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:18,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:11:18,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:11:18,679 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) [2021-11-06 17:11:18,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 17:11:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:20,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 4244 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 17:11:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:11:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 17:11:20,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959596951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:11:20,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:11:20,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 17:11:20,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286492124] [2021-11-06 17:11:20,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:11:20,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:11:20,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:20,794 INFO L87 Difference]: Start difference. First operand 46637 states and 64028 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2021-11-06 17:11:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:22,019 INFO L93 Difference]: Finished difference Result 93355 states and 128153 transitions. [2021-11-06 17:11:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 17:11:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) Word has length 126 [2021-11-06 17:11:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:22,097 INFO L225 Difference]: With dead ends: 93355 [2021-11-06 17:11:22,097 INFO L226 Difference]: Without dead ends: 46733 [2021-11-06 17:11:22,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46733 states. [2021-11-06 17:11:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46733 to 46733. [2021-11-06 17:11:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46733 states, 46725 states have (on average 1.3723702514713751) internal successors, (64124), 46732 states have internal predecessors, (64124), 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) [2021-11-06 17:11:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46733 states to 46733 states and 64124 transitions. [2021-11-06 17:11:23,180 INFO L78 Accepts]: Start accepts. Automaton has 46733 states and 64124 transitions. Word has length 126 [2021-11-06 17:11:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:23,181 INFO L470 AbstractCegarLoop]: Abstraction has 46733 states and 64124 transitions. [2021-11-06 17:11:23,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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) [2021-11-06 17:11:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 46733 states and 64124 transitions. [2021-11-06 17:11:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-06 17:11:23,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:23,183 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:11:23,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-06 17:11:23,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-06 17:11:23,384 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2039287199, now seen corresponding path program 2 times [2021-11-06 17:11:23,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:23,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436279421] [2021-11-06 17:11:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:23,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-06 17:11:23,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:23,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436279421] [2021-11-06 17:11:23,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436279421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:23,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:23,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 17:11:23,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967548286] [2021-11-06 17:11:23,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:11:23,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:23,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:11:23,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:11:23,707 INFO L87 Difference]: Start difference. First operand 46733 states and 64124 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2021-11-06 17:11:25,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:25,790 INFO L93 Difference]: Finished difference Result 136523 states and 187961 transitions. [2021-11-06 17:11:25,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 17:11:25,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) Word has length 132 [2021-11-06 17:11:25,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:25,964 INFO L225 Difference]: With dead ends: 136523 [2021-11-06 17:11:25,964 INFO L226 Difference]: Without dead ends: 89805 [2021-11-06 17:11:26,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:26,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89805 states. [2021-11-06 17:11:27,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89805 to 46765. [2021-11-06 17:11:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46765 states, 46757 states have (on average 1.372115405179973) internal successors, (64156), 46764 states have internal predecessors, (64156), 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) [2021-11-06 17:11:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46765 states to 46765 states and 64156 transitions. [2021-11-06 17:11:27,563 INFO L78 Accepts]: Start accepts. Automaton has 46765 states and 64156 transitions. Word has length 132 [2021-11-06 17:11:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:27,564 INFO L470 AbstractCegarLoop]: Abstraction has 46765 states and 64156 transitions. [2021-11-06 17:11:27,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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) [2021-11-06 17:11:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 46765 states and 64156 transitions. [2021-11-06 17:11:27,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-06 17:11:27,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:27,566 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:11:27,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 17:11:27,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash 66372555, now seen corresponding path program 1 times [2021-11-06 17:11:27,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:27,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518157192] [2021-11-06 17:11:27,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:27,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-06 17:11:27,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:27,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518157192] [2021-11-06 17:11:27,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518157192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:27,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:27,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 17:11:27,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446287711] [2021-11-06 17:11:27,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:11:27,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:11:27,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:11:27,992 INFO L87 Difference]: Start difference. First operand 46765 states and 64156 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 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) [2021-11-06 17:11:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:11:31,278 INFO L93 Difference]: Finished difference Result 182595 states and 251325 transitions. [2021-11-06 17:11:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 17:11:31,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 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) Word has length 155 [2021-11-06 17:11:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:11:31,569 INFO L225 Difference]: With dead ends: 182595 [2021-11-06 17:11:31,569 INFO L226 Difference]: Without dead ends: 135845 [2021-11-06 17:11:31,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:11:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135845 states. [2021-11-06 17:11:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135845 to 46789. [2021-11-06 17:11:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46789 states, 46781 states have (on average 1.371924499262521) internal successors, (64180), 46788 states have internal predecessors, (64180), 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) [2021-11-06 17:11:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46789 states to 46789 states and 64180 transitions. [2021-11-06 17:11:33,882 INFO L78 Accepts]: Start accepts. Automaton has 46789 states and 64180 transitions. Word has length 155 [2021-11-06 17:11:33,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:11:33,882 INFO L470 AbstractCegarLoop]: Abstraction has 46789 states and 64180 transitions. [2021-11-06 17:11:33,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 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) [2021-11-06 17:11:33,882 INFO L276 IsEmpty]: Start isEmpty. Operand 46789 states and 64180 transitions. [2021-11-06 17:11:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-06 17:11:33,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:11:33,885 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:11:33,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 17:11:33,885 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-06 17:11:33,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:11:33,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1746790569, now seen corresponding path program 1 times [2021-11-06 17:11:33,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:11:33,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318706574] [2021-11-06 17:11:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:11:33,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:11:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:11:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-06 17:11:34,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:11:34,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318706574] [2021-11-06 17:11:34,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318706574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:11:34,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:11:34,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 17:11:34,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471849268] [2021-11-06 17:11:34,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:11:34,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:11:34,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:11:34,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:11:34,206 INFO L87 Difference]: Start difference. First operand 46789 states and 64180 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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)