./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-08_1a-drivers--char--raw.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-08_1a-drivers--char--raw.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 793a6c625c75092f747de022bbd4fd421346f4483d489a12fa5057c55b9e4cfa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 15:40:23,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 15:40:23,645 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 15:40:23,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 15:40:23,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 15:40:23,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 15:40:23,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 15:40:23,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 15:40:23,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 15:40:23,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 15:40:23,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 15:40:23,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 15:40:23,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 15:40:23,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 15:40:23,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 15:40:23,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 15:40:23,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 15:40:23,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 15:40:23,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 15:40:23,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 15:40:23,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 15:40:23,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 15:40:23,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 15:40:23,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 15:40:23,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 15:40:23,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 15:40:23,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 15:40:23,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 15:40:23,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 15:40:23,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 15:40:23,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 15:40:23,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 15:40:23,776 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 15:40:23,777 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 15:40:23,778 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 15:40:23,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 15:40:23,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 15:40:23,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 15:40:23,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 15:40:23,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 15:40:23,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 15:40:23,782 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 15:40:23,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 15:40:23,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 15:40:23,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 15:40:23,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 15:40:23,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 15:40:23,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 15:40:23,828 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 15:40:23,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 15:40:23,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 15:40:23,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 15:40:23,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 15:40:23,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 15:40:23,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 15:40:23,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 15:40:23,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 15:40:23,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 15:40:23,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 15:40:23,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 15:40:23,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 15:40:23,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:40:23,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 15:40:23,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 15:40:23,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 15:40:23,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 15:40:23,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 15:40:23,832 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 15:40:23,833 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 15:40:23,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 15:40:23,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 15:40:23,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 793a6c625c75092f747de022bbd4fd421346f4483d489a12fa5057c55b9e4cfa [2021-11-06 15:40:24,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 15:40:24,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 15:40:24,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 15:40:24,154 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 15:40:24,155 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 15:40:24,156 INFO L432 ainManager$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-08_1a-drivers--char--raw.ko-entry_point.cil.out.i [2021-11-06 15:40:24,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe6b98ed/8af14c2f57a94419a0da85887d771a0c/FLAG6c0d32803 [2021-11-06 15:40:24,863 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 15:40:24,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--char--raw.ko-entry_point.cil.out.i [2021-11-06 15:40:24,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe6b98ed/8af14c2f57a94419a0da85887d771a0c/FLAG6c0d32803 [2021-11-06 15:40:25,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe6b98ed/8af14c2f57a94419a0da85887d771a0c [2021-11-06 15:40:25,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 15:40:25,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 15:40:25,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 15:40:25,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 15:40:25,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 15:40:25,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:40:25" (1/1) ... [2021-11-06 15:40:25,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46696c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:25, skipping insertion in model container [2021-11-06 15:40:25,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:40:25" (1/1) ... [2021-11-06 15:40:25,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 15:40:25,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 15:40:26,012 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-08_1a-drivers--char--raw.ko-entry_point.cil.out.i[135044,135057] [2021-11-06 15:40:26,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:40:26,164 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 15:40:26,378 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-08_1a-drivers--char--raw.ko-entry_point.cil.out.i[135044,135057] [2021-11-06 15:40:26,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:40:26,421 INFO L208 MainTranslator]: Completed translation [2021-11-06 15:40:26,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26 WrapperNode [2021-11-06 15:40:26,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 15:40:26,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 15:40:26,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 15:40:26,425 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 15:40:26,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 15:40:26,582 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 15:40:26,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 15:40:26,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 15:40:26,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 15:40:26,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 15:40:26,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 15:40:26,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 15:40:26,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (1/1) ... [2021-11-06 15:40:26,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:40:26,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:40:26,796 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 15:40:26,800 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 15:40:26,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 15:40:26,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 15:40:26,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 15:40:26,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 15:40:26,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 15:40:26,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 15:40:26,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 15:40:26,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 15:40:26,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 15:40:26,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 15:40:26,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 15:40:28,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 15:40:28,512 INFO L299 CfgBuilder]: Removed 424 assume(true) statements. [2021-11-06 15:40:28,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:40:28 BoogieIcfgContainer [2021-11-06 15:40:28,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 15:40:28,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 15:40:28,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 15:40:28,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 15:40:28,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 03:40:25" (1/3) ... [2021-11-06 15:40:28,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e7e41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:40:28, skipping insertion in model container [2021-11-06 15:40:28,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:40:26" (2/3) ... [2021-11-06 15:40:28,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72e7e41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:40:28, skipping insertion in model container [2021-11-06 15:40:28,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:40:28" (3/3) ... [2021-11-06 15:40:28,527 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--char--raw.ko-entry_point.cil.out.i [2021-11-06 15:40:28,535 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 15:40:28,536 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-06 15:40:28,590 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 15:40:28,596 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 15:40:28,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-06 15:40:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 380 states, 376 states have (on average 1.4015957446808511) internal successors, (527), 379 states have internal predecessors, (527), 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 15:40:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 15:40:28,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:28,645 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, 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 15:40:28,645 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1479266012, now seen corresponding path program 1 times [2021-11-06 15:40:28,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:28,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655129574] [2021-11-06 15:40:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:28,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:29,012 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 15:40:29,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:29,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655129574] [2021-11-06 15:40:29,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655129574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:29,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:29,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:40:29,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178291461] [2021-11-06 15:40:29,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 15:40:29,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:29,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 15:40:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 15:40:29,035 INFO L87 Difference]: Start difference. First operand has 380 states, 376 states have (on average 1.4015957446808511) internal successors, (527), 379 states have internal predecessors, (527), 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 34.0) internal successors, (68), 2 states have internal predecessors, (68), 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 15:40:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:29,077 INFO L93 Difference]: Finished difference Result 756 states and 1049 transitions. [2021-11-06 15:40:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 15:40:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 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 68 [2021-11-06 15:40:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:29,090 INFO L225 Difference]: With dead ends: 756 [2021-11-06 15:40:29,091 INFO L226 Difference]: Without dead ends: 372 [2021-11-06 15:40:29,095 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 15:40:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-06 15:40:29,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2021-11-06 15:40:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 369 states have (on average 1.3387533875338753) internal successors, (494), 371 states have internal predecessors, (494), 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 15:40:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 494 transitions. [2021-11-06 15:40:29,166 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 494 transitions. Word has length 68 [2021-11-06 15:40:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:29,167 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 494 transitions. [2021-11-06 15:40:29,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 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 15:40:29,168 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 494 transitions. [2021-11-06 15:40:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 15:40:29,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:29,170 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, 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 15:40:29,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 15:40:29,171 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash 500946732, now seen corresponding path program 1 times [2021-11-06 15:40:29,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:29,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361588813] [2021-11-06 15:40:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:29,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:29,429 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 15:40:29,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:29,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361588813] [2021-11-06 15:40:29,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361588813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:29,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:29,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:40:29,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547838282] [2021-11-06 15:40:29,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:29,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:29,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:40:29,435 INFO L87 Difference]: Start difference. First operand 372 states and 494 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 15:40:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:29,508 INFO L93 Difference]: Finished difference Result 951 states and 1286 transitions. [2021-11-06 15:40:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:29,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-06 15:40:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:29,512 INFO L225 Difference]: With dead ends: 951 [2021-11-06 15:40:29,513 INFO L226 Difference]: Without dead ends: 634 [2021-11-06 15:40:29,514 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 15:40:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-06 15:40:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 630. [2021-11-06 15:40:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 627 states have (on average 1.3620414673046253) internal successors, (854), 629 states have internal predecessors, (854), 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 15:40:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 854 transitions. [2021-11-06 15:40:29,537 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 854 transitions. Word has length 68 [2021-11-06 15:40:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:29,538 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 854 transitions. [2021-11-06 15:40:29,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 15:40:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 854 transitions. [2021-11-06 15:40:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-06 15:40:29,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:29,541 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, 1, 1, 1, 1, 1, 1, 1, 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 15:40:29,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 15:40:29,542 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:29,543 INFO L85 PathProgramCache]: Analyzing trace with hash -351650709, now seen corresponding path program 1 times [2021-11-06 15:40:29,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:29,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653714124] [2021-11-06 15:40:29,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:29,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:40:29,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653714124] [2021-11-06 15:40:29,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653714124] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:29,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:29,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:40:29,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171683254] [2021-11-06 15:40:29,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:29,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:40:29,785 INFO L87 Difference]: Start difference. First operand 630 states and 854 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 15:40:29,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:29,829 INFO L93 Difference]: Finished difference Result 1205 states and 1641 transitions. [2021-11-06 15:40:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:29,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 75 [2021-11-06 15:40:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:29,832 INFO L225 Difference]: With dead ends: 1205 [2021-11-06 15:40:29,833 INFO L226 Difference]: Without dead ends: 630 [2021-11-06 15:40:29,834 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 15:40:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-06 15:40:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 630. [2021-11-06 15:40:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 627 states have (on average 1.3604465709728868) internal successors, (853), 629 states have internal predecessors, (853), 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 15:40:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 853 transitions. [2021-11-06 15:40:29,854 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 853 transitions. Word has length 75 [2021-11-06 15:40:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:29,855 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 853 transitions. [2021-11-06 15:40:29,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 15:40:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 853 transitions. [2021-11-06 15:40:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-06 15:40:29,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:29,857 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, 1, 1, 1, 1, 1, 1, 1, 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 15:40:29,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 15:40:29,857 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:29,858 INFO L85 PathProgramCache]: Analyzing trace with hash -938456723, now seen corresponding path program 1 times [2021-11-06 15:40:29,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:29,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277331261] [2021-11-06 15:40:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:29,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:30,002 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 15:40:30,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:30,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277331261] [2021-11-06 15:40:30,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277331261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:30,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:30,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:40:30,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860637290] [2021-11-06 15:40:30,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:30,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:30,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:30,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:40:30,007 INFO L87 Difference]: Start difference. First operand 630 states and 853 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 15:40:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:30,068 INFO L93 Difference]: Finished difference Result 1774 states and 2420 transitions. [2021-11-06 15:40:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:30,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 75 [2021-11-06 15:40:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:30,079 INFO L225 Difference]: With dead ends: 1774 [2021-11-06 15:40:30,079 INFO L226 Difference]: Without dead ends: 1193 [2021-11-06 15:40:30,081 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 15:40:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-11-06 15:40:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1187. [2021-11-06 15:40:30,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1184 states have (on average 1.3657094594594594) internal successors, (1617), 1186 states have internal predecessors, (1617), 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 15:40:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1617 transitions. [2021-11-06 15:40:30,121 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1617 transitions. Word has length 75 [2021-11-06 15:40:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:30,122 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1617 transitions. [2021-11-06 15:40:30,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 15:40:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1617 transitions. [2021-11-06 15:40:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 15:40:30,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:30,125 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:40:30,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 15:40:30,126 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash -768560265, now seen corresponding path program 1 times [2021-11-06 15:40:30,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:30,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428631770] [2021-11-06 15:40:30,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:30,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:40:30,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:30,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428631770] [2021-11-06 15:40:30,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428631770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:30,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:30,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:40:30,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183778020] [2021-11-06 15:40:30,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:30,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:40:30,214 INFO L87 Difference]: Start difference. First operand 1187 states and 1617 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 15:40:30,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:30,311 INFO L93 Difference]: Finished difference Result 2701 states and 3699 transitions. [2021-11-06 15:40:30,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:30,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2021-11-06 15:40:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:30,318 INFO L225 Difference]: With dead ends: 2701 [2021-11-06 15:40:30,319 INFO L226 Difference]: Without dead ends: 1569 [2021-11-06 15:40:30,321 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 15:40:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-11-06 15:40:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1561. [2021-11-06 15:40:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1558 states have (on average 1.3722721437740693) internal successors, (2138), 1560 states have internal predecessors, (2138), 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 15:40:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 2138 transitions. [2021-11-06 15:40:30,371 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 2138 transitions. Word has length 81 [2021-11-06 15:40:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:30,371 INFO L470 AbstractCegarLoop]: Abstraction has 1561 states and 2138 transitions. [2021-11-06 15:40:30,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 15:40:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 2138 transitions. [2021-11-06 15:40:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-06 15:40:30,376 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:30,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:40:30,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 15:40:30,377 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash 498924061, now seen corresponding path program 1 times [2021-11-06 15:40:30,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:30,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243077463] [2021-11-06 15:40:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:30,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:30,555 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 15:40:30,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:30,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243077463] [2021-11-06 15:40:30,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243077463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:30,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:30,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:40:30,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589539995] [2021-11-06 15:40:30,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:30,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:30,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:30,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:40:30,562 INFO L87 Difference]: Start difference. First operand 1561 states and 2138 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 15:40:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:30,640 INFO L93 Difference]: Finished difference Result 2477 states and 3385 transitions. [2021-11-06 15:40:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:30,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2021-11-06 15:40:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:30,645 INFO L225 Difference]: With dead ends: 2477 [2021-11-06 15:40:30,646 INFO L226 Difference]: Without dead ends: 969 [2021-11-06 15:40:30,649 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 15:40:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-06 15:40:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 965. [2021-11-06 15:40:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 962 states have (on average 1.3565488565488566) internal successors, (1305), 964 states have internal predecessors, (1305), 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 15:40:30,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1305 transitions. [2021-11-06 15:40:30,690 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1305 transitions. Word has length 114 [2021-11-06 15:40:30,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:30,691 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1305 transitions. [2021-11-06 15:40:30,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 15:40:30,691 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1305 transitions. [2021-11-06 15:40:30,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-06 15:40:30,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:30,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:40:30,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 15:40:30,694 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:30,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1008397151, now seen corresponding path program 1 times [2021-11-06 15:40:30,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:30,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627324297] [2021-11-06 15:40:30,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:30,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:30,836 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 15:40:30,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:30,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627324297] [2021-11-06 15:40:30,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627324297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:30,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:30,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:40:30,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071752138] [2021-11-06 15:40:30,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:30,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:30,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:30,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:40:30,840 INFO L87 Difference]: Start difference. First operand 965 states and 1305 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 15:40:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:30,955 INFO L93 Difference]: Finished difference Result 2029 states and 2764 transitions. [2021-11-06 15:40:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:30,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 114 [2021-11-06 15:40:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:30,961 INFO L225 Difference]: With dead ends: 2029 [2021-11-06 15:40:30,962 INFO L226 Difference]: Without dead ends: 1202 [2021-11-06 15:40:30,966 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 15:40:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-11-06 15:40:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1193. [2021-11-06 15:40:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1190 states have (on average 1.3630252100840337) internal successors, (1622), 1192 states have internal predecessors, (1622), 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 15:40:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1622 transitions. [2021-11-06 15:40:31,013 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1622 transitions. Word has length 114 [2021-11-06 15:40:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:31,014 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 1622 transitions. [2021-11-06 15:40:31,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 15:40:31,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1622 transitions. [2021-11-06 15:40:31,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-06 15:40:31,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:31,020 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-06 15:40:31,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 15:40:31,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -34736104, now seen corresponding path program 1 times [2021-11-06 15:40:31,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:31,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555707202] [2021-11-06 15:40:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:31,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:40:31,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:31,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555707202] [2021-11-06 15:40:31,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555707202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:31,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123071352] [2021-11-06 15:40:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:31,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:31,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:40:31,151 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 15:40:31,181 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 15:40:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:31,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-06 15:40:31,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:40:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 15:40:31,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123071352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:31,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:40:31,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-06 15:40:31,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297453528] [2021-11-06 15:40:31,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:31,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:40:31,921 INFO L87 Difference]: Start difference. First operand 1193 states and 1622 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 15:40:31,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:31,995 INFO L93 Difference]: Finished difference Result 3185 states and 4338 transitions. [2021-11-06 15:40:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 125 [2021-11-06 15:40:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:32,005 INFO L225 Difference]: With dead ends: 3185 [2021-11-06 15:40:32,005 INFO L226 Difference]: Without dead ends: 2130 [2021-11-06 15:40:32,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:40:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-11-06 15:40:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1197. [2021-11-06 15:40:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1194 states have (on average 1.3618090452261307) internal successors, (1626), 1196 states have internal predecessors, (1626), 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 15:40:32,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1626 transitions. [2021-11-06 15:40:32,057 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1626 transitions. Word has length 125 [2021-11-06 15:40:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:32,058 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1626 transitions. [2021-11-06 15:40:32,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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 15:40:32,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1626 transitions. [2021-11-06 15:40:32,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-06 15:40:32,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:32,060 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-06 15:40:32,092 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 15:40:32,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:32,279 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash 358290906, now seen corresponding path program 1 times [2021-11-06 15:40:32,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:32,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317103477] [2021-11-06 15:40:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:32,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:40:32,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:32,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317103477] [2021-11-06 15:40:32,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317103477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:32,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:32,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 15:40:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393843411] [2021-11-06 15:40:32,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:40:32,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:40:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:40:32,536 INFO L87 Difference]: Start difference. First operand 1197 states and 1626 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 15:40:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:32,968 INFO L93 Difference]: Finished difference Result 5008 states and 6915 transitions. [2021-11-06 15:40:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 15:40:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 125 [2021-11-06 15:40:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:32,985 INFO L225 Difference]: With dead ends: 5008 [2021-11-06 15:40:32,986 INFO L226 Difference]: Without dead ends: 3949 [2021-11-06 15:40:32,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:40:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2021-11-06 15:40:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 1215. [2021-11-06 15:40:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1212 states have (on average 1.3564356435643565) internal successors, (1644), 1214 states have internal predecessors, (1644), 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 15:40:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1644 transitions. [2021-11-06 15:40:33,096 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1644 transitions. Word has length 125 [2021-11-06 15:40:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:33,096 INFO L470 AbstractCegarLoop]: Abstraction has 1215 states and 1644 transitions. [2021-11-06 15:40:33,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 15:40:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1644 transitions. [2021-11-06 15:40:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-06 15:40:33,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:33,102 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-06 15:40:33,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 15:40:33,103 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:33,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1051886210, now seen corresponding path program 1 times [2021-11-06 15:40:33,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:33,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276597773] [2021-11-06 15:40:33,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:33,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 15:40:33,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:33,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276597773] [2021-11-06 15:40:33,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276597773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:33,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:33,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 15:40:33,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130060466] [2021-11-06 15:40:33,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:40:33,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:40:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:40:33,335 INFO L87 Difference]: Start difference. First operand 1215 states and 1644 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 15:40:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:33,651 INFO L93 Difference]: Finished difference Result 4940 states and 6701 transitions. [2021-11-06 15:40:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 15:40:33,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 131 [2021-11-06 15:40:33,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:33,669 INFO L225 Difference]: With dead ends: 4940 [2021-11-06 15:40:33,669 INFO L226 Difference]: Without dead ends: 3863 [2021-11-06 15:40:33,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:40:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2021-11-06 15:40:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 1221. [2021-11-06 15:40:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1218 states have (on average 1.354679802955665) internal successors, (1650), 1220 states have internal predecessors, (1650), 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 15:40:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1650 transitions. [2021-11-06 15:40:33,813 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1650 transitions. Word has length 131 [2021-11-06 15:40:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:33,814 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 1650 transitions. [2021-11-06 15:40:33,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 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 15:40:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1650 transitions. [2021-11-06 15:40:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-06 15:40:33,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:33,817 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-06 15:40:33,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 15:40:33,818 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1095311460, now seen corresponding path program 1 times [2021-11-06 15:40:33,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:33,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214281811] [2021-11-06 15:40:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:33,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 15:40:34,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:34,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214281811] [2021-11-06 15:40:34,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214281811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:34,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:40:34,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:40:34,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810763602] [2021-11-06 15:40:34,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:40:34,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:40:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:40:34,018 INFO L87 Difference]: Start difference. First operand 1221 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 15:40:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:34,157 INFO L93 Difference]: Finished difference Result 2427 states and 3289 transitions. [2021-11-06 15:40:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:40:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 15:40:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:34,162 INFO L225 Difference]: With dead ends: 2427 [2021-11-06 15:40:34,162 INFO L226 Difference]: Without dead ends: 1226 [2021-11-06 15:40:34,164 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 15:40:34,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-11-06 15:40:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1226. [2021-11-06 15:40:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1223 states have (on average 1.3532297628781684) internal successors, (1655), 1225 states have internal predecessors, (1655), 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 15:40:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1655 transitions. [2021-11-06 15:40:34,248 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1655 transitions. Word has length 132 [2021-11-06 15:40:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:34,248 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1655 transitions. [2021-11-06 15:40:34,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 15:40:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1655 transitions. [2021-11-06 15:40:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-06 15:40:34,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:34,251 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-06 15:40:34,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 15:40:34,251 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:34,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1333015512, now seen corresponding path program 1 times [2021-11-06 15:40:34,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:34,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323438695] [2021-11-06 15:40:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:34,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 15:40:34,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:34,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323438695] [2021-11-06 15:40:34,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323438695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:34,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208030786] [2021-11-06 15:40:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:34,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:40:34,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:40:34,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 15:40:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1902 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 15:40:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:40:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 15:40:35,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208030786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:40:35,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:40:35,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 15:40:35,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608961437] [2021-11-06 15:40:35,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:40:35,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:40:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:40:35,222 INFO L87 Difference]: Start difference. First operand 1226 states and 1655 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 15:40:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:35,353 INFO L93 Difference]: Finished difference Result 2326 states and 3138 transitions. [2021-11-06 15:40:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 15:40:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 137 [2021-11-06 15:40:35,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:35,358 INFO L225 Difference]: With dead ends: 2326 [2021-11-06 15:40:35,358 INFO L226 Difference]: Without dead ends: 1221 [2021-11-06 15:40:35,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:40:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-06 15:40:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1144. [2021-11-06 15:40:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1141 states have (on average 1.3628396143733568) internal successors, (1555), 1143 states have internal predecessors, (1555), 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 15:40:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 1555 transitions. [2021-11-06 15:40:35,430 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 1555 transitions. Word has length 137 [2021-11-06 15:40:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:35,430 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 1555 transitions. [2021-11-06 15:40:35,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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 15:40:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 1555 transitions. [2021-11-06 15:40:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-06 15:40:35,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:35,433 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-06 15:40:35,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 15:40:35,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-06 15:40:35,648 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:35,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1612003360, now seen corresponding path program 1 times [2021-11-06 15:40:35,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:35,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980144062] [2021-11-06 15:40:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:35,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:35,855 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 15:40:35,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:35,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980144062] [2021-11-06 15:40:35,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980144062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:35,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626404446] [2021-11-06 15:40:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:35,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:40:35,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:40:35,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 15:40:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:36,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 15:40:36,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:40:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 15:40:37,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626404446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:37,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:40:37,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-06 15:40:37,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910892551] [2021-11-06 15:40:37,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 15:40:37,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:37,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 15:40:37,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:40:37,348 INFO L87 Difference]: Start difference. First operand 1144 states and 1555 transitions. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 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 15:40:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:37,559 INFO L93 Difference]: Finished difference Result 2279 states and 3112 transitions. [2021-11-06 15:40:37,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:40:37,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 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 140 [2021-11-06 15:40:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:37,568 INFO L225 Difference]: With dead ends: 2279 [2021-11-06 15:40:37,568 INFO L226 Difference]: Without dead ends: 1156 [2021-11-06 15:40:37,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:40:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-11-06 15:40:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2021-11-06 15:40:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1153 states have (on average 1.3590633130962706) internal successors, (1567), 1155 states have internal predecessors, (1567), 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 15:40:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1567 transitions. [2021-11-06 15:40:37,654 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1567 transitions. Word has length 140 [2021-11-06 15:40:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:37,654 INFO L470 AbstractCegarLoop]: Abstraction has 1156 states and 1567 transitions. [2021-11-06 15:40:37,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 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 15:40:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1567 transitions. [2021-11-06 15:40:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-06 15:40:37,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:37,657 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] [2021-11-06 15:40:37,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 15:40:37,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:37,872 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:37,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash -15948008, now seen corresponding path program 1 times [2021-11-06 15:40:37,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:37,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116864600] [2021-11-06 15:40:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:37,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-06 15:40:38,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:38,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116864600] [2021-11-06 15:40:38,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116864600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:38,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040826903] [2021-11-06 15:40:38,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:38,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:40:38,141 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:40:38,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 15:40:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 2035 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-06 15:40:39,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:40:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-06 15:40:40,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040826903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:40,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:40:40,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-11-06 15:40:40,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846425165] [2021-11-06 15:40:40,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 15:40:40,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 15:40:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:40:40,130 INFO L87 Difference]: Start difference. First operand 1156 states and 1567 transitions. Second operand has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 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 15:40:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:40,423 INFO L93 Difference]: Finished difference Result 2302 states and 3135 transitions. [2021-11-06 15:40:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 15:40:40,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 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 152 [2021-11-06 15:40:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:40,429 INFO L225 Difference]: With dead ends: 2302 [2021-11-06 15:40:40,430 INFO L226 Difference]: Without dead ends: 1168 [2021-11-06 15:40:40,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:40:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-11-06 15:40:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1168. [2021-11-06 15:40:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1165 states have (on average 1.3553648068669528) internal successors, (1579), 1167 states have internal predecessors, (1579), 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 15:40:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1579 transitions. [2021-11-06 15:40:40,496 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1579 transitions. Word has length 152 [2021-11-06 15:40:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:40,496 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1579 transitions. [2021-11-06 15:40:40,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 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 15:40:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1579 transitions. [2021-11-06 15:40:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-06 15:40:40,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:40,499 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:40:40,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 15:40:40,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:40,720 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:40,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1365634336, now seen corresponding path program 2 times [2021-11-06 15:40:40,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:40,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150099687] [2021-11-06 15:40:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:40,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-06 15:40:40,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:40,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150099687] [2021-11-06 15:40:40,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150099687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:40,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902919271] [2021-11-06 15:40:40,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:40:40,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:40,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:40:40,992 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:40:41,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 15:40:43,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 15:40:43,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:40:43,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-06 15:40:43,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:40:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-06 15:40:44,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902919271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:44,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:40:44,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-11-06 15:40:44,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368876749] [2021-11-06 15:40:44,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 15:40:44,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:40:44,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 15:40:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-06 15:40:44,165 INFO L87 Difference]: Start difference. First operand 1168 states and 1579 transitions. Second operand has 12 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 states have internal predecessors, (155), 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 15:40:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:40:44,650 INFO L93 Difference]: Finished difference Result 2325 states and 3158 transitions. [2021-11-06 15:40:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 15:40:44,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 states have internal predecessors, (155), 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 164 [2021-11-06 15:40:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:40:44,656 INFO L225 Difference]: With dead ends: 2325 [2021-11-06 15:40:44,656 INFO L226 Difference]: Without dead ends: 1180 [2021-11-06 15:40:44,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-06 15:40:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-11-06 15:40:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1180. [2021-11-06 15:40:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1177 states have (on average 1.3517417162276975) internal successors, (1591), 1179 states have internal predecessors, (1591), 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 15:40:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1591 transitions. [2021-11-06 15:40:44,746 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1591 transitions. Word has length 164 [2021-11-06 15:40:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:40:44,746 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1591 transitions. [2021-11-06 15:40:44,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.916666666666666) internal successors, (155), 12 states have internal predecessors, (155), 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 15:40:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1591 transitions. [2021-11-06 15:40:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-06 15:40:44,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:40:44,750 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-06 15:40:44,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 15:40:44,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-06 15:40:44,976 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:40:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:40:44,976 INFO L85 PathProgramCache]: Analyzing trace with hash -373510888, now seen corresponding path program 3 times [2021-11-06 15:40:44,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:40:44,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11500515] [2021-11-06 15:40:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:40:44,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:40:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:40:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-06 15:40:45,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:40:45,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11500515] [2021-11-06 15:40:45,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11500515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:40:45,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174920409] [2021-11-06 15:40:45,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 15:40:45,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:40:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:40:45,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:40:45,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 15:41:27,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-06 15:41:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:41:27,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-06 15:41:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:41:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-06 15:41:27,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174920409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:41:27,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:41:27,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 11 [2021-11-06 15:41:27,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573151465] [2021-11-06 15:41:27,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 15:41:27,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:41:27,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 15:41:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-06 15:41:27,558 INFO L87 Difference]: Start difference. First operand 1180 states and 1591 transitions. Second operand has 11 states, 11 states have (on average 13.818181818181818) internal successors, (152), 11 states have internal predecessors, (152), 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 15:41:27,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:41:27,949 INFO L93 Difference]: Finished difference Result 2337 states and 3164 transitions. [2021-11-06 15:41:27,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 15:41:27,950 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.818181818181818) internal successors, (152), 11 states have internal predecessors, (152), 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 176 [2021-11-06 15:41:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:41:27,954 INFO L225 Difference]: With dead ends: 2337 [2021-11-06 15:41:27,955 INFO L226 Difference]: Without dead ends: 1187 [2021-11-06 15:41:27,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-06 15:41:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-11-06 15:41:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1187. [2021-11-06 15:41:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1184 states have (on average 1.349662162162162) internal successors, (1598), 1186 states have internal predecessors, (1598), 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 15:41:28,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1598 transitions. [2021-11-06 15:41:28,020 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1598 transitions. Word has length 176 [2021-11-06 15:41:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:41:28,020 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1598 transitions. [2021-11-06 15:41:28,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.818181818181818) internal successors, (152), 11 states have internal predecessors, (152), 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 15:41:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1598 transitions. [2021-11-06 15:41:28,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-06 15:41:28,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:41:28,023 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-06 15:41:28,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 15:41:28,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-06 15:41:28,240 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:41:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:41:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash 571515628, now seen corresponding path program 4 times [2021-11-06 15:41:28,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:41:28,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69974468] [2021-11-06 15:41:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:41:28,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:41:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:41:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-06 15:41:28,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:41:28,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69974468] [2021-11-06 15:41:28,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69974468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:41:28,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260366681] [2021-11-06 15:41:28,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 15:41:28,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:41:28,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:41:28,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:41:28,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 15:41:34,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 15:41:34,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:41:34,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 2221 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 15:41:34,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:41:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-06 15:41:34,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260366681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:41:34,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:41:34,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 12 [2021-11-06 15:41:34,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378898994] [2021-11-06 15:41:34,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 15:41:34,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:41:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 15:41:34,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-06 15:41:34,674 INFO L87 Difference]: Start difference. First operand 1187 states and 1598 transitions. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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 15:41:35,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:41:35,213 INFO L93 Difference]: Finished difference Result 2350 states and 3177 transitions. [2021-11-06 15:41:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 15:41:35,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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 183 [2021-11-06 15:41:35,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:41:35,218 INFO L225 Difference]: With dead ends: 2350 [2021-11-06 15:41:35,219 INFO L226 Difference]: Without dead ends: 1194 [2021-11-06 15:41:35,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-06 15:41:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-11-06 15:41:35,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1194. [2021-11-06 15:41:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1191 states have (on average 1.3476070528967254) internal successors, (1605), 1193 states have internal predecessors, (1605), 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 15:41:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1605 transitions. [2021-11-06 15:41:35,280 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1605 transitions. Word has length 183 [2021-11-06 15:41:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:41:35,280 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1605 transitions. [2021-11-06 15:41:35,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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 15:41:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1605 transitions. [2021-11-06 15:41:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-06 15:41:35,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:41:35,283 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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] [2021-11-06 15:41:35,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 15:41:35,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:41:35,508 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:41:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:41:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash -249878888, now seen corresponding path program 5 times [2021-11-06 15:41:35,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:41:35,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567191855] [2021-11-06 15:41:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:41:35,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:41:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:41:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-06 15:41:35,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:41:35,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567191855] [2021-11-06 15:41:35,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567191855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:41:35,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90677981] [2021-11-06 15:41:35,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 15:41:35,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:41:35,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:41:35,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:41:35,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process Killed by 15