./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.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-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.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 b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 15:25:48,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 15:25:48,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 15:25:48,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 15:25:48,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 15:25:48,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 15:25:48,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 15:25:48,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 15:25:48,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 15:25:48,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 15:25:48,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 15:25:48,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 15:25:48,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 15:25:48,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 15:25:48,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 15:25:48,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 15:25:48,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 15:25:48,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 15:25:48,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 15:25:48,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 15:25:48,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 15:25:48,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 15:25:48,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 15:25:48,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 15:25:48,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 15:25:48,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 15:25:48,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 15:25:48,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 15:25:48,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 15:25:48,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 15:25:48,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 15:25:48,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 15:25:48,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 15:25:48,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 15:25:48,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 15:25:48,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 15:25:48,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 15:25:48,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 15:25:48,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 15:25:48,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 15:25:48,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 15:25:48,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 15:25:48,708 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 15:25:48,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 15:25:48,709 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 15:25:48,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 15:25:48,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 15:25:48,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 15:25:48,711 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 15:25:48,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 15:25:48,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 15:25:48,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 15:25:48,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 15:25:48,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 15:25:48,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 15:25:48,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 15:25:48,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 15:25:48,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 15:25:48,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 15:25:48,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 15:25:48,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 15:25:48,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:25:48,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 15:25:48,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 15:25:48,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 15:25:48,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 15:25:48,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 15:25:48,715 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 15:25:48,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 15:25:48,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 15:25:48,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 15:25:48,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b83c28af83745ba79af1b1ebec4b495db7aa2efb3702685bbdc4b86421ef4c0a [2021-11-06 15:25:48,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 15:25:49,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 15:25:49,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 15:25:49,021 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 15:25:49,022 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 15:25:49,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-06 15:25:49,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68bee16de/4f85ca0334f548239f70e1577e639595/FLAG4dbadd859 [2021-11-06 15:25:49,823 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 15:25:49,824 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-06 15:25:49,863 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68bee16de/4f85ca0334f548239f70e1577e639595/FLAG4dbadd859 [2021-11-06 15:25:49,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68bee16de/4f85ca0334f548239f70e1577e639595 [2021-11-06 15:25:49,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 15:25:49,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 15:25:49,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 15:25:49,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 15:25:49,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 15:25:49,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:25:49" (1/1) ... [2021-11-06 15:25:49,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4f1d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:49, skipping insertion in model container [2021-11-06 15:25:49,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:25:49" (1/1) ... [2021-11-06 15:25:49,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 15:25:50,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 15:25:51,171 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-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-06 15:25:51,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:25:51,207 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 15:25:51,458 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-validator-v0.8/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i[216887,216900] [2021-11-06 15:25:51,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:25:51,572 INFO L208 MainTranslator]: Completed translation [2021-11-06 15:25:51,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51 WrapperNode [2021-11-06 15:25:51,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 15:25:51,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 15:25:51,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 15:25:51,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 15:25:51,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:51,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:51,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 15:25:51,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 15:25:51,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 15:25:51,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 15:25:51,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:51,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:51,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:51,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:52,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:52,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:52,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:52,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 15:25:52,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 15:25:52,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 15:25:52,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 15:25:52,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (1/1) ... [2021-11-06 15:25:52,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:25:52,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:25:52,273 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 15:25:52,299 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 15:25:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 15:25:52,320 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-06 15:25:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 15:25:52,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 15:25:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 15:25:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 15:25:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 15:25:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 15:25:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 15:25:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 15:25:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 15:25:52,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 15:25:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 15:25:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 15:25:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 15:25:52,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 15:25:52,323 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 15:25:59,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 15:25:59,710 INFO L299 CfgBuilder]: Removed 1734 assume(true) statements. [2021-11-06 15:25:59,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:25:59 BoogieIcfgContainer [2021-11-06 15:25:59,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 15:25:59,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 15:25:59,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 15:25:59,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 15:25:59,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 03:25:49" (1/3) ... [2021-11-06 15:25:59,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d158cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:25:59, skipping insertion in model container [2021-11-06 15:25:59,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:25:51" (2/3) ... [2021-11-06 15:25:59,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d158cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:25:59, skipping insertion in model container [2021-11-06 15:25:59,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:25:59" (3/3) ... [2021-11-06 15:25:59,721 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-06 15:25:59,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 15:25:59,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 15:25:59,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 15:25:59,775 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 15:25:59,776 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 15:25:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 1834 states, 1832 states have (on average 1.4939956331877728) internal successors, (2737), 1833 states have internal predecessors, (2737), 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 15:25:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 15:25:59,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:25:59,828 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] [2021-11-06 15:25:59,829 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:25:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:25:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1253874950, now seen corresponding path program 1 times [2021-11-06 15:25:59,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:25:59,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30877796] [2021-11-06 15:25:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:25:59,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:00,227 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 15:26:00,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:00,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30877796] [2021-11-06 15:26:00,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30877796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:00,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:00,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:26:00,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480020341] [2021-11-06 15:26:00,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 15:26:00,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:00,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 15:26:00,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 15:26:00,258 INFO L87 Difference]: Start difference. First operand has 1834 states, 1832 states have (on average 1.4939956331877728) internal successors, (2737), 1833 states have internal predecessors, (2737), 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 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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 15:26:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:00,366 INFO L93 Difference]: Finished difference Result 3664 states and 5469 transitions. [2021-11-06 15:26:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 15:26:00,367 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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 65 [2021-11-06 15:26:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:00,392 INFO L225 Difference]: With dead ends: 3664 [2021-11-06 15:26:00,393 INFO L226 Difference]: Without dead ends: 1799 [2021-11-06 15:26:00,402 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 15:26:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-11-06 15:26:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1799. [2021-11-06 15:26:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 1.4799777530589544) internal successors, (2661), 1798 states have internal predecessors, (2661), 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 15:26:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2661 transitions. [2021-11-06 15:26:00,515 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2661 transitions. Word has length 65 [2021-11-06 15:26:00,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:00,516 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2661 transitions. [2021-11-06 15:26:00,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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 15:26:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2661 transitions. [2021-11-06 15:26:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-06 15:26:00,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:00,524 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] [2021-11-06 15:26:00,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 15:26:00,526 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:00,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:00,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1631549198, now seen corresponding path program 1 times [2021-11-06 15:26:00,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:00,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031991226] [2021-11-06 15:26:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:00,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:00,762 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 15:26:00,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:00,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031991226] [2021-11-06 15:26:00,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031991226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:00,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:00,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:00,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547366507] [2021-11-06 15:26:00,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:00,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:00,770 INFO L87 Difference]: Start difference. First operand 1799 states and 2661 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 15:26:00,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:00,940 INFO L93 Difference]: Finished difference Result 4402 states and 6506 transitions. [2021-11-06 15:26:00,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-06 15:26:00,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:00,954 INFO L225 Difference]: With dead ends: 4402 [2021-11-06 15:26:00,954 INFO L226 Difference]: Without dead ends: 2655 [2021-11-06 15:26:00,958 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 15:26:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-11-06 15:26:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2655. [2021-11-06 15:26:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 1.4713639788997739) internal successors, (3905), 2654 states have internal predecessors, (3905), 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 15:26:01,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 3905 transitions. [2021-11-06 15:26:01,029 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 3905 transitions. Word has length 65 [2021-11-06 15:26:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:01,029 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 3905 transitions. [2021-11-06 15:26:01,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 15:26:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 3905 transitions. [2021-11-06 15:26:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-06 15:26:01,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:01,033 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:01,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 15:26:01,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash -91525010, now seen corresponding path program 1 times [2021-11-06 15:26:01,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:01,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955154955] [2021-11-06 15:26:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:01,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:26:01,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:01,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955154955] [2021-11-06 15:26:01,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955154955] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:01,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:01,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:26:01,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740839700] [2021-11-06 15:26:01,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:01,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:01,205 INFO L87 Difference]: Start difference. First operand 2655 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 15:26:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:01,296 INFO L93 Difference]: Finished difference Result 5258 states and 7749 transitions. [2021-11-06 15:26:01,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 93 [2021-11-06 15:26:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:01,307 INFO L225 Difference]: With dead ends: 5258 [2021-11-06 15:26:01,308 INFO L226 Difference]: Without dead ends: 2655 [2021-11-06 15:26:01,313 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 15:26:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-11-06 15:26:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2655. [2021-11-06 15:26:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 1.4706103993971364) internal successors, (3903), 2654 states have internal predecessors, (3903), 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 15:26:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 3903 transitions. [2021-11-06 15:26:01,385 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 3903 transitions. Word has length 93 [2021-11-06 15:26:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:01,387 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 3903 transitions. [2021-11-06 15:26:01,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 15:26:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 3903 transitions. [2021-11-06 15:26:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-06 15:26:01,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:01,391 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:01,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 15:26:01,392 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash 568006512, now seen corresponding path program 1 times [2021-11-06 15:26:01,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:01,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237823407] [2021-11-06 15:26:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:01,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:26:01,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:01,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237823407] [2021-11-06 15:26:01,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237823407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:01,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:01,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:26:01,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454930592] [2021-11-06 15:26:01,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:01,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:01,523 INFO L87 Difference]: Start difference. First operand 2655 states and 3903 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 15:26:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:01,719 INFO L93 Difference]: Finished difference Result 5262 states and 7749 transitions. [2021-11-06 15:26:01,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:26:01,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 93 [2021-11-06 15:26:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:01,730 INFO L225 Difference]: With dead ends: 5262 [2021-11-06 15:26:01,730 INFO L226 Difference]: Without dead ends: 2655 [2021-11-06 15:26:01,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-11-06 15:26:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2655. [2021-11-06 15:26:01,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2654 states have (on average 1.4698568198944988) internal successors, (3901), 2654 states have internal predecessors, (3901), 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 15:26:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 3901 transitions. [2021-11-06 15:26:01,797 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 3901 transitions. Word has length 93 [2021-11-06 15:26:01,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:01,798 INFO L470 AbstractCegarLoop]: Abstraction has 2655 states and 3901 transitions. [2021-11-06 15:26:01,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 15:26:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 3901 transitions. [2021-11-06 15:26:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-06 15:26:01,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:01,802 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:01,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 15:26:01,802 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1785240599, now seen corresponding path program 1 times [2021-11-06 15:26:01,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:01,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910996093] [2021-11-06 15:26:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:01,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:01,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:01,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910996093] [2021-11-06 15:26:01,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910996093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:01,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:01,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:26:01,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165017053] [2021-11-06 15:26:01,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:01,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:01,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:01,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:01,944 INFO L87 Difference]: Start difference. First operand 2655 states and 3901 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 15:26:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:02,131 INFO L93 Difference]: Finished difference Result 5260 states and 7743 transitions. [2021-11-06 15:26:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:26:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 96 [2021-11-06 15:26:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:02,152 INFO L225 Difference]: With dead ends: 5260 [2021-11-06 15:26:02,153 INFO L226 Difference]: Without dead ends: 5258 [2021-11-06 15:26:02,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2021-11-06 15:26:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 2657. [2021-11-06 15:26:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 1.4695030120481927) internal successors, (3903), 2656 states have internal predecessors, (3903), 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 15:26:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3903 transitions. [2021-11-06 15:26:02,273 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3903 transitions. Word has length 96 [2021-11-06 15:26:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:02,274 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 3903 transitions. [2021-11-06 15:26:02,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 15:26:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3903 transitions. [2021-11-06 15:26:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 15:26:02,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:02,279 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:02,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 15:26:02,280 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 876338064, now seen corresponding path program 1 times [2021-11-06 15:26:02,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:02,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44257491] [2021-11-06 15:26:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:02,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:02,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:02,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:02,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44257491] [2021-11-06 15:26:02,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44257491] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:02,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:02,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:02,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354498692] [2021-11-06 15:26:02,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:02,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:02,440 INFO L87 Difference]: Start difference. First operand 2657 states and 3903 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 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 15:26:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:02,708 INFO L93 Difference]: Finished difference Result 7867 states and 11587 transitions. [2021-11-06 15:26:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:26:02,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 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 103 [2021-11-06 15:26:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:02,729 INFO L225 Difference]: With dead ends: 7867 [2021-11-06 15:26:02,729 INFO L226 Difference]: Without dead ends: 5262 [2021-11-06 15:26:02,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5262 states. [2021-11-06 15:26:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5262 to 2658. [2021-11-06 15:26:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2657 states have (on average 1.4693263078660144) internal successors, (3904), 2657 states have internal predecessors, (3904), 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 15:26:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3904 transitions. [2021-11-06 15:26:02,899 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3904 transitions. Word has length 103 [2021-11-06 15:26:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:02,900 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 3904 transitions. [2021-11-06 15:26:02,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 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 15:26:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3904 transitions. [2021-11-06 15:26:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-06 15:26:02,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:02,905 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:02,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 15:26:02,905 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash -434275537, now seen corresponding path program 1 times [2021-11-06 15:26:02,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:02,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219570842] [2021-11-06 15:26:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:02,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:03,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:03,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219570842] [2021-11-06 15:26:03,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219570842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:03,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:03,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 15:26:03,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067599337] [2021-11-06 15:26:03,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:26:03,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:03,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:26:03,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:03,031 INFO L87 Difference]: Start difference. First operand 2658 states and 3904 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 15:26:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:03,525 INFO L93 Difference]: Finished difference Result 10137 states and 14938 transitions. [2021-11-06 15:26:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 15:26:03,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 105 [2021-11-06 15:26:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:03,566 INFO L225 Difference]: With dead ends: 10137 [2021-11-06 15:26:03,566 INFO L226 Difference]: Without dead ends: 10135 [2021-11-06 15:26:03,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:26:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10135 states. [2021-11-06 15:26:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10135 to 2659. [2021-11-06 15:26:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 1.4691497366440933) internal successors, (3905), 2658 states have internal predecessors, (3905), 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 15:26:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3905 transitions. [2021-11-06 15:26:03,816 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3905 transitions. Word has length 105 [2021-11-06 15:26:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:03,816 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 3905 transitions. [2021-11-06 15:26:03,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 15:26:03,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3905 transitions. [2021-11-06 15:26:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-06 15:26:03,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:03,823 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:03,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 15:26:03,824 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1568264917, now seen corresponding path program 1 times [2021-11-06 15:26:03,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:03,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388440155] [2021-11-06 15:26:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:03,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:26:03,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:03,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388440155] [2021-11-06 15:26:03,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388440155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:03,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:03,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:03,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421983893] [2021-11-06 15:26:03,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:03,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:03,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:03,957 INFO L87 Difference]: Start difference. First operand 2659 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:04,231 INFO L93 Difference]: Finished difference Result 6115 states and 8982 transitions. [2021-11-06 15:26:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:04,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-06 15:26:04,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:04,242 INFO L225 Difference]: With dead ends: 6115 [2021-11-06 15:26:04,242 INFO L226 Difference]: Without dead ends: 3508 [2021-11-06 15:26:04,247 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 15:26:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-11-06 15:26:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 2659. [2021-11-06 15:26:04,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 1.4687735139202407) internal successors, (3904), 2658 states have internal predecessors, (3904), 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 15:26:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3904 transitions. [2021-11-06 15:26:04,396 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3904 transitions. Word has length 119 [2021-11-06 15:26:04,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:04,396 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 3904 transitions. [2021-11-06 15:26:04,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:04,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3904 transitions. [2021-11-06 15:26:04,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-06 15:26:04,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:04,403 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:04,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 15:26:04,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1677758673, now seen corresponding path program 1 times [2021-11-06 15:26:04,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:04,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411028483] [2021-11-06 15:26:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:04,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:04,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:04,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411028483] [2021-11-06 15:26:04,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411028483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:04,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:04,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:04,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434620688] [2021-11-06 15:26:04,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:04,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:04,536 INFO L87 Difference]: Start difference. First operand 2659 states and 3904 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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 15:26:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:04,917 INFO L93 Difference]: Finished difference Result 7872 states and 11589 transitions. [2021-11-06 15:26:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:26:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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 121 [2021-11-06 15:26:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:04,930 INFO L225 Difference]: With dead ends: 7872 [2021-11-06 15:26:04,931 INFO L226 Difference]: Without dead ends: 5265 [2021-11-06 15:26:04,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-11-06 15:26:05,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 2663. [2021-11-06 15:26:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.4684447783621337) internal successors, (3909), 2662 states have internal predecessors, (3909), 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 15:26:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3909 transitions. [2021-11-06 15:26:05,106 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3909 transitions. Word has length 121 [2021-11-06 15:26:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:05,107 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3909 transitions. [2021-11-06 15:26:05,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 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 15:26:05,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3909 transitions. [2021-11-06 15:26:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-06 15:26:05,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:05,113 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:05,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 15:26:05,113 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:05,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1953947601, now seen corresponding path program 1 times [2021-11-06 15:26:05,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:05,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559114833] [2021-11-06 15:26:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:05,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 15:26:05,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:05,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559114833] [2021-11-06 15:26:05,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559114833] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:05,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:05,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:05,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050948711] [2021-11-06 15:26:05,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:05,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:05,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:05,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:05,220 INFO L87 Difference]: Start difference. First operand 2663 states and 3909 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 15:26:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:05,528 INFO L93 Difference]: Finished difference Result 5301 states and 7784 transitions. [2021-11-06 15:26:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:05,528 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 124 [2021-11-06 15:26:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:05,534 INFO L225 Difference]: With dead ends: 5301 [2021-11-06 15:26:05,535 INFO L226 Difference]: Without dead ends: 2690 [2021-11-06 15:26:05,540 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 15:26:05,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-11-06 15:26:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2663. [2021-11-06 15:26:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.43801652892562) internal successors, (3828), 2662 states have internal predecessors, (3828), 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 15:26:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3828 transitions. [2021-11-06 15:26:05,712 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3828 transitions. Word has length 124 [2021-11-06 15:26:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:05,712 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3828 transitions. [2021-11-06 15:26:05,713 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 15:26:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3828 transitions. [2021-11-06 15:26:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-06 15:26:05,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:05,718 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:05,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 15:26:05,719 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 233252873, now seen corresponding path program 1 times [2021-11-06 15:26:05,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:05,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178472875] [2021-11-06 15:26:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:05,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:05,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:05,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:05,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178472875] [2021-11-06 15:26:05,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178472875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:05,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73910217] [2021-11-06 15:26:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:05,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:05,923 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 15:26:05,924 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 15:26:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1515 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 15:26:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:26:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:06,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73910217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:06,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:26:06,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-06 15:26:06,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160193386] [2021-11-06 15:26:06,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 15:26:06,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:06,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 15:26:06,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:26:06,916 INFO L87 Difference]: Start difference. First operand 2663 states and 3828 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 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 15:26:07,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:07,604 INFO L93 Difference]: Finished difference Result 10482 states and 15110 transitions. [2021-11-06 15:26:07,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:26:07,605 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 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 127 [2021-11-06 15:26:07,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:07,622 INFO L225 Difference]: With dead ends: 10482 [2021-11-06 15:26:07,622 INFO L226 Difference]: Without dead ends: 7871 [2021-11-06 15:26:07,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:26:07,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-11-06 15:26:07,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 2666. [2021-11-06 15:26:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 1.4378986866791745) internal successors, (3832), 2665 states have internal predecessors, (3832), 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 15:26:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 3832 transitions. [2021-11-06 15:26:07,816 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 3832 transitions. Word has length 127 [2021-11-06 15:26:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:07,817 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 3832 transitions. [2021-11-06 15:26:07,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 6 states have internal predecessors, (129), 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 15:26:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 3832 transitions. [2021-11-06 15:26:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-06 15:26:07,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:07,823 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:07,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 15:26:08,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-06 15:26:08,039 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2049324809, now seen corresponding path program 2 times [2021-11-06 15:26:08,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:08,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753666325] [2021-11-06 15:26:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:08,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:08,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:08,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753666325] [2021-11-06 15:26:08,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753666325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:08,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42269265] [2021-11-06 15:26:08,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:26:08,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:08,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:08,200 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 15:26:08,202 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 15:26:09,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 15:26:09,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:26:09,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 15:26:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:26:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 15:26:09,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42269265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:09,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:26:09,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-06 15:26:09,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292007788] [2021-11-06 15:26:09,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:09,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:09,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-06 15:26:09,475 INFO L87 Difference]: Start difference. First operand 2666 states and 3832 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 15:26:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:10,111 INFO L93 Difference]: Finished difference Result 10158 states and 14649 transitions. [2021-11-06 15:26:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:26:10,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 130 [2021-11-06 15:26:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:10,136 INFO L225 Difference]: With dead ends: 10158 [2021-11-06 15:26:10,137 INFO L226 Difference]: Without dead ends: 7544 [2021-11-06 15:26:10,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:26:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7544 states. [2021-11-06 15:26:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7544 to 2668. [2021-11-06 15:26:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 1.437570303712036) internal successors, (3834), 2667 states have internal predecessors, (3834), 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 15:26:10,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 3834 transitions. [2021-11-06 15:26:10,341 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 3834 transitions. Word has length 130 [2021-11-06 15:26:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:10,342 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 3834 transitions. [2021-11-06 15:26:10,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 15:26:10,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 3834 transitions. [2021-11-06 15:26:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-06 15:26:10,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:10,347 INFO L513 BasicCegarLoop]: trace histogram [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 15:26:10,378 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 15:26:10,561 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 15:26:10,561 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:10,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1620095719, now seen corresponding path program 1 times [2021-11-06 15:26:10,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:10,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072308043] [2021-11-06 15:26:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:10,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:10,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:10,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072308043] [2021-11-06 15:26:10,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072308043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:10,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:10,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:10,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142309727] [2021-11-06 15:26:10,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:10,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:10,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:10,665 INFO L87 Difference]: Start difference. First operand 2668 states and 3834 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 15:26:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:11,057 INFO L93 Difference]: Finished difference Result 7736 states and 11150 transitions. [2021-11-06 15:26:11,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 134 [2021-11-06 15:26:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:11,070 INFO L225 Difference]: With dead ends: 7736 [2021-11-06 15:26:11,070 INFO L226 Difference]: Without dead ends: 5120 [2021-11-06 15:26:11,074 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 15:26:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5120 states. [2021-11-06 15:26:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5120 to 2671. [2021-11-06 15:26:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2670 states have (on average 1.4374531835205993) internal successors, (3838), 2670 states have internal predecessors, (3838), 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 15:26:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3838 transitions. [2021-11-06 15:26:11,263 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3838 transitions. Word has length 134 [2021-11-06 15:26:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:11,263 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 3838 transitions. [2021-11-06 15:26:11,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 15:26:11,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3838 transitions. [2021-11-06 15:26:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-06 15:26:11,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:11,270 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:11,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 15:26:11,271 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:11,272 INFO L85 PathProgramCache]: Analyzing trace with hash -106626130, now seen corresponding path program 1 times [2021-11-06 15:26:11,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:11,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364644930] [2021-11-06 15:26:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:11,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:26:11,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:11,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364644930] [2021-11-06 15:26:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364644930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:11,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:11,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 15:26:11,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324423183] [2021-11-06 15:26:11,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 15:26:11,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:11,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 15:26:11,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:26:11,517 INFO L87 Difference]: Start difference. First operand 2671 states and 3838 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 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 15:26:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:12,835 INFO L93 Difference]: Finished difference Result 14876 states and 21375 transitions. [2021-11-06 15:26:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 15:26:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 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 138 [2021-11-06 15:26:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:12,861 INFO L225 Difference]: With dead ends: 14876 [2021-11-06 15:26:12,861 INFO L226 Difference]: Without dead ends: 12243 [2021-11-06 15:26:12,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-06 15:26:12,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12243 states. [2021-11-06 15:26:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12243 to 2671. [2021-11-06 15:26:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2670 states have (on average 1.4367041198501873) internal successors, (3836), 2670 states have internal predecessors, (3836), 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 15:26:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3836 transitions. [2021-11-06 15:26:13,129 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3836 transitions. Word has length 138 [2021-11-06 15:26:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:13,130 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 3836 transitions. [2021-11-06 15:26:13,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 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 15:26:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3836 transitions. [2021-11-06 15:26:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-06 15:26:13,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:13,138 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 15:26:13,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 15:26:13,138 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash -662167478, now seen corresponding path program 1 times [2021-11-06 15:26:13,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:13,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206493990] [2021-11-06 15:26:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:13,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:13,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:13,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206493990] [2021-11-06 15:26:13,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206493990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:13,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:13,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 15:26:13,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232511768] [2021-11-06 15:26:13,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:26:13,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:13,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:26:13,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:13,321 INFO L87 Difference]: Start difference. First operand 2671 states and 3836 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 15:26:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:14,661 INFO L93 Difference]: Finished difference Result 17810 states and 25712 transitions. [2021-11-06 15:26:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 15:26:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 15:26:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:14,690 INFO L225 Difference]: With dead ends: 17810 [2021-11-06 15:26:14,690 INFO L226 Difference]: Without dead ends: 15191 [2021-11-06 15:26:14,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 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 15:26:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2021-11-06 15:26:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 2674. [2021-11-06 15:26:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 1.4362139917695473) internal successors, (3839), 2673 states have internal predecessors, (3839), 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 15:26:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3839 transitions. [2021-11-06 15:26:14,995 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3839 transitions. Word has length 140 [2021-11-06 15:26:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:14,996 INFO L470 AbstractCegarLoop]: Abstraction has 2674 states and 3839 transitions. [2021-11-06 15:26:14,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 15:26:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3839 transitions. [2021-11-06 15:26:15,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-06 15:26:15,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:15,000 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:15,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 15:26:15,001 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1448079762, now seen corresponding path program 1 times [2021-11-06 15:26:15,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:15,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967066648] [2021-11-06 15:26:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:15,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 15:26:15,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:15,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967066648] [2021-11-06 15:26:15,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967066648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:15,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:15,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:15,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083057500] [2021-11-06 15:26:15,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:15,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:15,195 INFO L87 Difference]: Start difference. First operand 2674 states and 3839 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 15:26:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:15,529 INFO L93 Difference]: Finished difference Result 5321 states and 7653 transitions. [2021-11-06 15:26:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:15,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 142 [2021-11-06 15:26:15,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:15,534 INFO L225 Difference]: With dead ends: 5321 [2021-11-06 15:26:15,534 INFO L226 Difference]: Without dead ends: 2679 [2021-11-06 15:26:15,538 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 15:26:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-11-06 15:26:15,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2679. [2021-11-06 15:26:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2678 states have (on average 1.4353995519044063) internal successors, (3844), 2678 states have internal predecessors, (3844), 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 15:26:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3844 transitions. [2021-11-06 15:26:15,797 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3844 transitions. Word has length 142 [2021-11-06 15:26:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:15,798 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 3844 transitions. [2021-11-06 15:26:15,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 15:26:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3844 transitions. [2021-11-06 15:26:15,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-06 15:26:15,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:15,803 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:15,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 15:26:15,804 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1644420281, now seen corresponding path program 1 times [2021-11-06 15:26:15,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:15,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224615593] [2021-11-06 15:26:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:15,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 15:26:16,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:16,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224615593] [2021-11-06 15:26:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224615593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:16,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407436499] [2021-11-06 15:26:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:16,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:16,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:16,033 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 15:26:16,037 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 15:26:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:16,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 15:26:16,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:26:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 15:26:16,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407436499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:16,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:26:16,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 15:26:16,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476694244] [2021-11-06 15:26:16,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:26:16,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:16,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:26:16,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:26:16,918 INFO L87 Difference]: Start difference. First operand 2679 states and 3844 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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 15:26:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:17,593 INFO L93 Difference]: Finished difference Result 7920 states and 11395 transitions. [2021-11-06 15:26:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 15:26:17,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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 147 [2021-11-06 15:26:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:17,600 INFO L225 Difference]: With dead ends: 7920 [2021-11-06 15:26:17,600 INFO L226 Difference]: Without dead ends: 5288 [2021-11-06 15:26:17,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:26:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2021-11-06 15:26:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 2679. [2021-11-06 15:26:17,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2678 states have (on average 1.4346527259148618) internal successors, (3842), 2678 states have internal predecessors, (3842), 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 15:26:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 3842 transitions. [2021-11-06 15:26:17,878 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 3842 transitions. Word has length 147 [2021-11-06 15:26:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:17,878 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 3842 transitions. [2021-11-06 15:26:17,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 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 15:26:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 3842 transitions. [2021-11-06 15:26:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-06 15:26:17,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:17,883 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:17,911 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 15:26:18,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:18,111 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:18,112 INFO L85 PathProgramCache]: Analyzing trace with hash 956736394, now seen corresponding path program 1 times [2021-11-06 15:26:18,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:18,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836480703] [2021-11-06 15:26:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:18,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 15:26:18,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:18,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836480703] [2021-11-06 15:26:18,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836480703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:18,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427987117] [2021-11-06 15:26:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:18,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:18,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:18,310 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 15:26:18,312 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 15:26:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:19,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 15:26:19,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:26:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 15:26:20,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427987117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:20,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:26:20,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 15:26:20,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869230528] [2021-11-06 15:26:20,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:26:20,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:26:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:20,011 INFO L87 Difference]: Start difference. First operand 2679 states and 3842 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 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 15:26:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:20,388 INFO L93 Difference]: Finished difference Result 5330 states and 7658 transitions. [2021-11-06 15:26:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:26:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 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 147 [2021-11-06 15:26:20,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:20,393 INFO L225 Difference]: With dead ends: 5330 [2021-11-06 15:26:20,393 INFO L226 Difference]: Without dead ends: 2684 [2021-11-06 15:26:20,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:20,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-11-06 15:26:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2684. [2021-11-06 15:26:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2683 states have (on average 1.4338427133805443) internal successors, (3847), 2683 states have internal predecessors, (3847), 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 15:26:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3847 transitions. [2021-11-06 15:26:20,663 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3847 transitions. Word has length 147 [2021-11-06 15:26:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:20,664 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 3847 transitions. [2021-11-06 15:26:20,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 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 15:26:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3847 transitions. [2021-11-06 15:26:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-06 15:26:20,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:20,669 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:20,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-06 15:26:20,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-06 15:26:20,883 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1909592145, now seen corresponding path program 2 times [2021-11-06 15:26:20,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:20,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671447924] [2021-11-06 15:26:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:20,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 15:26:21,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:21,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671447924] [2021-11-06 15:26:21,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671447924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:21,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543704185] [2021-11-06 15:26:21,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:26:21,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:21,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:21,108 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 15:26:21,110 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 15:26:22,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 15:26:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:26:22,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 15:26:22,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:26:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-06 15:26:22,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543704185] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:22,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:26:22,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-06 15:26:22,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988910130] [2021-11-06 15:26:22,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:22,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:26:22,458 INFO L87 Difference]: Start difference. First operand 2684 states and 3847 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 15:26:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:22,658 INFO L93 Difference]: Finished difference Result 5328 states and 7651 transitions. [2021-11-06 15:26:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:22,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 15:26:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:22,662 INFO L225 Difference]: With dead ends: 5328 [2021-11-06 15:26:22,662 INFO L226 Difference]: Without dead ends: 2686 [2021-11-06 15:26:22,664 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:26:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-11-06 15:26:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2686. [2021-11-06 15:26:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 1.4335195530726257) internal successors, (3849), 2685 states have internal predecessors, (3849), 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 15:26:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 3849 transitions. [2021-11-06 15:26:22,968 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 3849 transitions. Word has length 152 [2021-11-06 15:26:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:22,968 INFO L470 AbstractCegarLoop]: Abstraction has 2686 states and 3849 transitions. [2021-11-06 15:26:22,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 15:26:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 3849 transitions. [2021-11-06 15:26:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-06 15:26:22,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:22,973 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:23,001 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 15:26:23,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:23,200 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:23,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1815951985, now seen corresponding path program 1 times [2021-11-06 15:26:23,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:23,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350004343] [2021-11-06 15:26:23,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:23,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 15:26:23,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:23,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350004343] [2021-11-06 15:26:23,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350004343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:23,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560360430] [2021-11-06 15:26:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:23,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:23,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:23,432 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 15:26:23,435 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 15:26:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-06 15:26:25,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:26:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 15:26:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560360430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:25,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:26:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 15:26:25,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957076540] [2021-11-06 15:26:25,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 15:26:25,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:25,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 15:26:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:26:25,436 INFO L87 Difference]: Start difference. First operand 2686 states and 3849 transitions. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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 15:26:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:25,882 INFO L93 Difference]: Finished difference Result 5343 states and 7671 transitions. [2021-11-06 15:26:25,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:26:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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 154 [2021-11-06 15:26:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:25,887 INFO L225 Difference]: With dead ends: 5343 [2021-11-06 15:26:25,887 INFO L226 Difference]: Without dead ends: 2691 [2021-11-06 15:26:25,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:26:25,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-11-06 15:26:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2691. [2021-11-06 15:26:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2691 states, 2690 states have (on average 1.4327137546468403) internal successors, (3854), 2690 states have internal predecessors, (3854), 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 15:26:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2691 states to 2691 states and 3854 transitions. [2021-11-06 15:26:26,115 INFO L78 Accepts]: Start accepts. Automaton has 2691 states and 3854 transitions. Word has length 154 [2021-11-06 15:26:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 2691 states and 3854 transitions. [2021-11-06 15:26:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 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 15:26:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2691 states and 3854 transitions. [2021-11-06 15:26:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-06 15:26:26,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:26,120 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:26:26,161 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 15:26:26,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:26,340 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:26:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash -748820474, now seen corresponding path program 2 times [2021-11-06 15:26:26,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:26,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892579648] [2021-11-06 15:26:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:26,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-06 15:26:26,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:26,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892579648] [2021-11-06 15:26:26,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892579648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:26,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912590968] [2021-11-06 15:26:26,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:26:26,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:26,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:26,589 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 15:26:26,614 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 15:28:16,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 15:28:16,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:28:16,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-06 15:28:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:28:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-06 15:28:17,037 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-06 15:28:17,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-06 15:28:17,149 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-06 15:28:17,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2021-11-06 15:28:17,798 INFO L354 Elim1Store]: treesize reduction 140, result has 19.1 percent of original size [2021-11-06 15:28:17,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 65 [2021-11-06 15:28:18,464 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-06 15:28:18,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 64 [2021-11-06 15:28:18,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-06 15:28:18,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-11-06 15:28:18,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-06 15:28:18,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-06 15:28:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-06 15:28:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-06 15:28:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-06 15:28:18,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2021-11-06 15:28:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:19,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:19,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-06 15:28:19,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:19,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-11-06 15:28:19,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:28:19,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-06 15:28:19,357 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-06 15:28:19,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 574 treesize of output 459 [2021-11-06 15:28:19,757 INFO L354 Elim1Store]: treesize reduction 328, result has 14.4 percent of original size [2021-11-06 15:28:19,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 555 treesize of output 459 [2021-11-06 15:28:20,045 INFO L354 Elim1Store]: treesize reduction 646, result has 10.2 percent of original size [2021-11-06 15:28:20,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 416 treesize of output 414 [2021-11-06 15:28:20,338 INFO L354 Elim1Store]: treesize reduction 1326, result has 8.4 percent of original size [2021-11-06 15:28:20,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 459 treesize of output 409 [2021-11-06 15:28:20,358 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-06 15:28:20,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 274 [2021-11-06 15:28:20,373 INFO L354 Elim1Store]: treesize reduction 288, result has 0.3 percent of original size [2021-11-06 15:28:20,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 274 treesize of output 230 [2021-11-06 15:28:20,384 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-06 15:28:20,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 193 treesize of output 157 [2021-11-06 15:28:20,949 INFO L354 Elim1Store]: treesize reduction 410, result has 9.7 percent of original size [2021-11-06 15:28:20,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 302 treesize of output 238 [2021-11-06 15:28:21,105 INFO L354 Elim1Store]: treesize reduction 496, result has 11.7 percent of original size [2021-11-06 15:28:21,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 287 treesize of output 286 [2021-11-06 15:28:21,228 INFO L354 Elim1Store]: treesize reduction 808, result has 9.3 percent of original size [2021-11-06 15:28:21,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 16 case distinctions, treesize of input 295 treesize of output 280 [2021-11-06 15:28:21,745 INFO L354 Elim1Store]: treesize reduction 444, result has 10.7 percent of original size [2021-11-06 15:28:21,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 307 treesize of output 237 [2021-11-06 15:28:21,858 INFO L354 Elim1Store]: treesize reduction 516, result has 11.2 percent of original size [2021-11-06 15:28:21,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 288 treesize of output 267 [2021-11-06 15:28:21,921 INFO L354 Elim1Store]: treesize reduction 406, result has 15.4 percent of original size [2021-11-06 15:28:21,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 269 treesize of output 280 [2021-11-06 15:28:23,309 INFO L354 Elim1Store]: treesize reduction 444, result has 10.7 percent of original size [2021-11-06 15:28:23,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 313 treesize of output 243 [2021-11-06 15:28:23,426 INFO L354 Elim1Store]: treesize reduction 516, result has 11.2 percent of original size [2021-11-06 15:28:23,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 294 treesize of output 273 [2021-11-06 15:28:23,503 INFO L354 Elim1Store]: treesize reduction 548, result has 13.2 percent of original size [2021-11-06 15:28:23,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 275 treesize of output 289 [2021-11-06 15:28:25,930 INFO L354 Elim1Store]: treesize reduction 444, result has 10.7 percent of original size [2021-11-06 15:28:25,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 334 treesize of output 264 [2021-11-06 15:28:26,063 INFO L354 Elim1Store]: treesize reduction 516, result has 11.2 percent of original size [2021-11-06 15:28:26,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 315 treesize of output 294 [2021-11-06 15:28:26,207 INFO L354 Elim1Store]: treesize reduction 898, result has 11.0 percent of original size [2021-11-06 15:28:26,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 296 treesize of output 326 [2021-11-06 15:28:27,876 INFO L354 Elim1Store]: treesize reduction 444, result has 10.7 percent of original size [2021-11-06 15:28:27,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 336 treesize of output 266 [2021-11-06 15:28:28,074 INFO L354 Elim1Store]: treesize reduction 516, result has 11.2 percent of original size [2021-11-06 15:28:28,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 317 treesize of output 296 [2021-11-06 15:28:28,211 INFO L354 Elim1Store]: treesize reduction 932, result has 9.8 percent of original size [2021-11-06 15:28:28,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 298 treesize of output 318 [2021-11-06 15:28:29,522 INFO L354 Elim1Store]: treesize reduction 626, result has 12.2 percent of original size [2021-11-06 15:28:29,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 716 treesize of output 575 [2021-11-06 15:28:29,546 INFO L354 Elim1Store]: treesize reduction 326, result has 0.3 percent of original size [2021-11-06 15:28:29,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 743 treesize of output 448 [2021-11-06 15:28:29,662 INFO L354 Elim1Store]: treesize reduction 358, result has 13.3 percent of original size [2021-11-06 15:28:29,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 433 treesize of output 322 [2021-11-06 15:28:29,704 INFO L354 Elim1Store]: treesize reduction 175, result has 6.4 percent of original size [2021-11-06 15:28:29,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 353 treesize of output 260 [2021-11-06 15:28:29,718 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-11-06 15:28:29,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 297 treesize of output 221 [2021-11-06 15:28:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-06 15:28:29,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912590968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:28:29,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:28:29,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [6] total 38 [2021-11-06 15:28:29,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725953135] [2021-11-06 15:28:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-06 15:28:29,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:28:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-06 15:28:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1300, Unknown=3, NotChecked=0, Total=1406 [2021-11-06 15:28:29,932 INFO L87 Difference]: Start difference. First operand 2691 states and 3854 transitions. Second operand has 34 states, 34 states have (on average 4.382352941176471) internal successors, (149), 34 states have internal predecessors, (149), 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) Killed by 15