./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6063bfeeaa4a025ac67d1a7a9b5cc20b489e34fc9db0d4dd9fcdda86c75b9c5e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 15:15:30,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 15:15:30,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 15:15:30,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 15:15:30,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 15:15:30,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 15:15:30,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 15:15:30,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 15:15:30,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 15:15:30,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 15:15:30,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 15:15:30,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 15:15:30,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 15:15:30,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 15:15:30,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 15:15:30,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 15:15:30,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 15:15:30,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 15:15:30,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 15:15:30,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 15:15:30,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 15:15:30,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 15:15:30,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 15:15:30,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 15:15:30,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 15:15:30,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 15:15:30,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 15:15:30,122 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 15:15:30,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 15:15:30,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 15:15:30,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 15:15:30,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 15:15:30,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 15:15:30,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 15:15:30,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 15:15:30,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 15:15:30,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 15:15:30,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 15:15:30,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 15:15:30,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 15:15:30,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 15:15:30,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 15:15:30,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 15:15:30,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 15:15:30,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 15:15:30,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 15:15:30,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 15:15:30,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 15:15:30,155 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 15:15:30,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 15:15:30,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 15:15:30,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 15:15:30,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 15:15:30,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 15:15:30,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 15:15:30,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 15:15:30,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 15:15:30,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 15:15:30,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 15:15:30,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 15:15:30,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 15:15:30,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:15:30,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 15:15:30,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 15:15:30,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 15:15:30,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 15:15:30,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 15:15:30,158 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 15:15:30,158 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 15:15:30,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 15:15:30,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 15:15:30,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6063bfeeaa4a025ac67d1a7a9b5cc20b489e34fc9db0d4dd9fcdda86c75b9c5e [2021-11-06 15:15:30,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 15:15:30,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 15:15:30,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 15:15:30,387 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 15:15:30,388 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 15:15:30,389 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-11-06 15:15:30,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b86ce55a9/8c32dae030fd42ebbec2dbc370481856/FLAG7f2df2341 [2021-11-06 15:15:30,944 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 15:15:30,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-11-06 15:15:30,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b86ce55a9/8c32dae030fd42ebbec2dbc370481856/FLAG7f2df2341 [2021-11-06 15:15:31,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b86ce55a9/8c32dae030fd42ebbec2dbc370481856 [2021-11-06 15:15:31,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 15:15:31,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 15:15:31,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 15:15:31,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 15:15:31,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 15:15:31,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:15:31" (1/1) ... [2021-11-06 15:15:31,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174a739e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:31, skipping insertion in model container [2021-11-06 15:15:31,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:15:31" (1/1) ... [2021-11-06 15:15:31,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 15:15:31,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 15:15:31,623 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-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i[139152,139165] [2021-11-06 15:15:32,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:15:32,054 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 15:15:32,118 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-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i[139152,139165] [2021-11-06 15:15:32,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:15:32,333 INFO L208 MainTranslator]: Completed translation [2021-11-06 15:15:32,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32 WrapperNode [2021-11-06 15:15:32,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 15:15:32,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 15:15:32,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 15:15:32,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 15:15:32,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,583 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 15:15:32,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 15:15:32,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 15:15:32,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 15:15:32,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 15:15:32,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 15:15:32,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 15:15:32,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 15:15:32,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (1/1) ... [2021-11-06 15:15:32,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:15:32,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:15:32,868 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 15:15:32,874 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 15:15:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 15:15:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-06 15:15:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 15:15:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 15:15:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 15:15:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 15:15:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 15:15:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 15:15:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 15:15:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 15:15:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 15:15:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 15:15:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 15:15:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 15:15:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 15:15:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 15:15:32,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 15:15:40,996 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 15:15:40,996 INFO L299 CfgBuilder]: Removed 1710 assume(true) statements. [2021-11-06 15:15:40,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:15:40 BoogieIcfgContainer [2021-11-06 15:15:40,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 15:15:41,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 15:15:41,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 15:15:41,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 15:15:41,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 03:15:31" (1/3) ... [2021-11-06 15:15:41,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2805bf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:15:41, skipping insertion in model container [2021-11-06 15:15:41,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:15:32" (2/3) ... [2021-11-06 15:15:41,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2805bf62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:15:41, skipping insertion in model container [2021-11-06 15:15:41,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:15:40" (3/3) ... [2021-11-06 15:15:41,005 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-11-06 15:15:41,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 15:15:41,008 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 15:15:41,044 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 15:15:41,048 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 15:15:41,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 15:15:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand has 1822 states, 1820 states have (on average 1.4972527472527473) internal successors, (2725), 1821 states have internal predecessors, (2725), 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 15:15:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-06 15:15:41,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:41,108 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] [2021-11-06 15:15:41,108 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1160297611, now seen corresponding path program 1 times [2021-11-06 15:15:41,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:41,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700249167] [2021-11-06 15:15:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:41,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:41,394 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 15:15:41,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:41,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700249167] [2021-11-06 15:15:41,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700249167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:41,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:41,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:15:41,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224120872] [2021-11-06 15:15:41,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:15:41,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:15:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:15:41,412 INFO L87 Difference]: Start difference. First operand has 1822 states, 1820 states have (on average 1.4972527472527473) internal successors, (2725), 1821 states have internal predecessors, (2725), 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 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 15:15:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:41,645 INFO L93 Difference]: Finished difference Result 4527 states and 6741 transitions. [2021-11-06 15:15:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:15:41,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 34 [2021-11-06 15:15:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:41,671 INFO L225 Difference]: With dead ends: 4527 [2021-11-06 15:15:41,671 INFO L226 Difference]: Without dead ends: 2643 [2021-11-06 15:15:41,680 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 15:15:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-11-06 15:15:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2643. [2021-11-06 15:15:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 1.4735049205147615) internal successors, (3893), 2642 states have internal predecessors, (3893), 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 15:15:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 3893 transitions. [2021-11-06 15:15:41,805 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 3893 transitions. Word has length 34 [2021-11-06 15:15:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:41,805 INFO L470 AbstractCegarLoop]: Abstraction has 2643 states and 3893 transitions. [2021-11-06 15:15:41,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 15:15:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 3893 transitions. [2021-11-06 15:15:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-06 15:15:41,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:41,811 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] [2021-11-06 15:15:41,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 15:15:41,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1112572812, now seen corresponding path program 1 times [2021-11-06 15:15:41,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:41,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198749269] [2021-11-06 15:15:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:41,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:41,943 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 15:15:41,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:41,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198749269] [2021-11-06 15:15:41,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198749269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:41,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:41,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:15:41,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963905220] [2021-11-06 15:15:41,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:15:41,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:15:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:15:41,946 INFO L87 Difference]: Start difference. First operand 2643 states and 3893 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 15:15:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:42,023 INFO L93 Difference]: Finished difference Result 5248 states and 7741 transitions. [2021-11-06 15:15:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:15:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 58 [2021-11-06 15:15:42,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:42,032 INFO L225 Difference]: With dead ends: 5248 [2021-11-06 15:15:42,032 INFO L226 Difference]: Without dead ends: 2643 [2021-11-06 15:15:42,036 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 15:15:42,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-11-06 15:15:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2643. [2021-11-06 15:15:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 1.4727479182437548) internal successors, (3891), 2642 states have internal predecessors, (3891), 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 15:15:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 3891 transitions. [2021-11-06 15:15:42,089 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 3891 transitions. Word has length 58 [2021-11-06 15:15:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:42,089 INFO L470 AbstractCegarLoop]: Abstraction has 2643 states and 3891 transitions. [2021-11-06 15:15:42,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 15:15:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 3891 transitions. [2021-11-06 15:15:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-06 15:15:42,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:42,093 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] [2021-11-06 15:15:42,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 15:15:42,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1040186254, now seen corresponding path program 1 times [2021-11-06 15:15:42,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:42,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148536983] [2021-11-06 15:15:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:42,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:42,191 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 15:15:42,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:42,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148536983] [2021-11-06 15:15:42,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148536983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:42,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:42,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:15:42,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557122711] [2021-11-06 15:15:42,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:15:42,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:42,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:15:42,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:15:42,207 INFO L87 Difference]: Start difference. First operand 2643 states and 3891 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 15:15:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:42,365 INFO L93 Difference]: Finished difference Result 5252 states and 7741 transitions. [2021-11-06 15:15:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:15:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2021-11-06 15:15:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:42,376 INFO L225 Difference]: With dead ends: 5252 [2021-11-06 15:15:42,376 INFO L226 Difference]: Without dead ends: 2643 [2021-11-06 15:15:42,379 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 15:15:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-11-06 15:15:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2643. [2021-11-06 15:15:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 1.471990915972748) internal successors, (3889), 2642 states have internal predecessors, (3889), 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 15:15:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 3889 transitions. [2021-11-06 15:15:42,429 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 3889 transitions. Word has length 58 [2021-11-06 15:15:42,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:42,429 INFO L470 AbstractCegarLoop]: Abstraction has 2643 states and 3889 transitions. [2021-11-06 15:15:42,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 15:15:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 3889 transitions. [2021-11-06 15:15:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-06 15:15:42,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:42,432 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] [2021-11-06 15:15:42,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 15:15:42,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:42,433 INFO L85 PathProgramCache]: Analyzing trace with hash -950381416, now seen corresponding path program 1 times [2021-11-06 15:15:42,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:42,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042338629] [2021-11-06 15:15:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:42,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:42,534 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 15:15:42,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:42,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042338629] [2021-11-06 15:15:42,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042338629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:42,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:42,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:15:42,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881203023] [2021-11-06 15:15:42,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:15:42,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:15:42,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:15:42,536 INFO L87 Difference]: Start difference. First operand 2643 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 15:15:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:42,660 INFO L93 Difference]: Finished difference Result 5250 states and 7735 transitions. [2021-11-06 15:15:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:15:42,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 61 [2021-11-06 15:15:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:42,677 INFO L225 Difference]: With dead ends: 5250 [2021-11-06 15:15:42,677 INFO L226 Difference]: Without dead ends: 5248 [2021-11-06 15:15:42,679 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 15:15:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2021-11-06 15:15:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 2645. [2021-11-06 15:15:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 1.4716338880484114) internal successors, (3891), 2644 states have internal predecessors, (3891), 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 15:15:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 3891 transitions. [2021-11-06 15:15:42,760 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 3891 transitions. Word has length 61 [2021-11-06 15:15:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:42,760 INFO L470 AbstractCegarLoop]: Abstraction has 2645 states and 3891 transitions. [2021-11-06 15:15:42,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 15:15:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 3891 transitions. [2021-11-06 15:15:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 15:15:42,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:42,763 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] [2021-11-06 15:15:42,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 15:15:42,763 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1784844290, now seen corresponding path program 1 times [2021-11-06 15:15:42,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:42,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084648318] [2021-11-06 15:15:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:42,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:42,833 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 15:15:42,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:42,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084648318] [2021-11-06 15:15:42,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084648318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:42,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:42,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:15:42,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129939388] [2021-11-06 15:15:42,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:15:42,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:42,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:15:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:15:42,837 INFO L87 Difference]: Start difference. First operand 2645 states and 3891 transitions. Second operand has 4 states, 4 states have (on average 16.25) 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 15:15:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:43,050 INFO L93 Difference]: Finished difference Result 7859 states and 11583 transitions. [2021-11-06 15:15:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:15:43,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) 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 68 [2021-11-06 15:15:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:43,067 INFO L225 Difference]: With dead ends: 7859 [2021-11-06 15:15:43,067 INFO L226 Difference]: Without dead ends: 5252 [2021-11-06 15:15:43,072 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 15:15:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5252 states. [2021-11-06 15:15:43,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5252 to 2646. [2021-11-06 15:15:43,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2645 states have (on average 1.4714555765595463) internal successors, (3892), 2645 states have internal predecessors, (3892), 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 15:15:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3892 transitions. [2021-11-06 15:15:43,169 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3892 transitions. Word has length 68 [2021-11-06 15:15:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:43,170 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3892 transitions. [2021-11-06 15:15:43,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) 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 15:15:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3892 transitions. [2021-11-06 15:15:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-06 15:15:43,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:43,175 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] [2021-11-06 15:15:43,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 15:15:43,175 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash 761784129, now seen corresponding path program 1 times [2021-11-06 15:15:43,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:43,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645954881] [2021-11-06 15:15:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:43,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:43,281 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 15:15:43,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:43,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645954881] [2021-11-06 15:15:43,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645954881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:43,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:43,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 15:15:43,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296442983] [2021-11-06 15:15:43,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:15:43,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:43,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:15:43,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:15:43,284 INFO L87 Difference]: Start difference. First operand 2646 states and 3892 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 15:15:43,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:43,723 INFO L93 Difference]: Finished difference Result 10131 states and 14938 transitions. [2021-11-06 15:15:43,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 15:15:43,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 70 [2021-11-06 15:15:43,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:43,761 INFO L225 Difference]: With dead ends: 10131 [2021-11-06 15:15:43,761 INFO L226 Difference]: Without dead ends: 10129 [2021-11-06 15:15:43,767 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 15:15:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10129 states. [2021-11-06 15:15:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10129 to 2647. [2021-11-06 15:15:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2646 states have (on average 1.4712773998488284) internal successors, (3893), 2646 states have internal predecessors, (3893), 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 15:15:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 3893 transitions. [2021-11-06 15:15:43,988 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 3893 transitions. Word has length 70 [2021-11-06 15:15:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:43,989 INFO L470 AbstractCegarLoop]: Abstraction has 2647 states and 3893 transitions. [2021-11-06 15:15:43,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 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 15:15:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 3893 transitions. [2021-11-06 15:15:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 15:15:43,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:43,995 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] [2021-11-06 15:15:43,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 15:15:43,995 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:43,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:43,995 INFO L85 PathProgramCache]: Analyzing trace with hash -573882723, now seen corresponding path program 1 times [2021-11-06 15:15:43,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:43,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234692488] [2021-11-06 15:15:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:43,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:44,117 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 15:15:44,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:44,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234692488] [2021-11-06 15:15:44,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234692488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:44,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:44,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:15:44,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657855754] [2021-11-06 15:15:44,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:15:44,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:15:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:15:44,123 INFO L87 Difference]: Start difference. First operand 2647 states and 3893 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 15:15:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:44,437 INFO L93 Difference]: Finished difference Result 6105 states and 8974 transitions. [2021-11-06 15:15:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:15:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-06 15:15:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:44,447 INFO L225 Difference]: With dead ends: 6105 [2021-11-06 15:15:44,448 INFO L226 Difference]: Without dead ends: 3496 [2021-11-06 15:15:44,453 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 15:15:44,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-11-06 15:15:44,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 2647. [2021-11-06 15:15:44,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2646 states have (on average 1.470899470899471) internal successors, (3892), 2646 states have internal predecessors, (3892), 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 15:15:44,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 3892 transitions. [2021-11-06 15:15:44,583 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 3892 transitions. Word has length 84 [2021-11-06 15:15:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:44,583 INFO L470 AbstractCegarLoop]: Abstraction has 2647 states and 3892 transitions. [2021-11-06 15:15:44,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 15:15:44,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 3892 transitions. [2021-11-06 15:15:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 15:15:44,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:44,594 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] [2021-11-06 15:15:44,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 15:15:44,595 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash -498722333, now seen corresponding path program 1 times [2021-11-06 15:15:44,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:44,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931295125] [2021-11-06 15:15:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:44,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:44,723 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 15:15:44,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:44,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931295125] [2021-11-06 15:15:44,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931295125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:44,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:44,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:15:44,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260609352] [2021-11-06 15:15:44,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:15:44,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:44,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:15:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:15:44,725 INFO L87 Difference]: Start difference. First operand 2647 states and 3892 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 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 15:15:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:45,040 INFO L93 Difference]: Finished difference Result 7864 states and 11585 transitions. [2021-11-06 15:15:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:15:45,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 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 86 [2021-11-06 15:15:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:45,052 INFO L225 Difference]: With dead ends: 7864 [2021-11-06 15:15:45,052 INFO L226 Difference]: Without dead ends: 5255 [2021-11-06 15:15:45,059 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 15:15:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5255 states. [2021-11-06 15:15:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5255 to 2651. [2021-11-06 15:15:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2650 states have (on average 1.4705660377358492) internal successors, (3897), 2650 states have internal predecessors, (3897), 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 15:15:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3897 transitions. [2021-11-06 15:15:45,198 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3897 transitions. Word has length 86 [2021-11-06 15:15:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:45,198 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 3897 transitions. [2021-11-06 15:15:45,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 3 states have internal predecessors, (83), 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 15:15:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3897 transitions. [2021-11-06 15:15:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-06 15:15:45,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:45,203 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] [2021-11-06 15:15:45,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 15:15:45,203 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash -767339072, now seen corresponding path program 1 times [2021-11-06 15:15:45,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:45,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437808797] [2021-11-06 15:15:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:45,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:45,259 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 15:15:45,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:45,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437808797] [2021-11-06 15:15:45,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437808797] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:45,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:45,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:15:45,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31331179] [2021-11-06 15:15:45,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:15:45,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:45,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:15:45,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:15:45,261 INFO L87 Difference]: Start difference. First operand 2651 states and 3897 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 15:15:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:45,533 INFO L93 Difference]: Finished difference Result 5291 states and 7776 transitions. [2021-11-06 15:15:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:15:45,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 89 [2021-11-06 15:15:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:45,538 INFO L225 Difference]: With dead ends: 5291 [2021-11-06 15:15:45,538 INFO L226 Difference]: Without dead ends: 2678 [2021-11-06 15:15:45,543 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 15:15:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-11-06 15:15:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2651. [2021-11-06 15:15:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2651 states, 2650 states have (on average 1.44) internal successors, (3816), 2650 states have internal predecessors, (3816), 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 15:15:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2651 states to 2651 states and 3816 transitions. [2021-11-06 15:15:45,665 INFO L78 Accepts]: Start accepts. Automaton has 2651 states and 3816 transitions. Word has length 89 [2021-11-06 15:15:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:45,665 INFO L470 AbstractCegarLoop]: Abstraction has 2651 states and 3816 transitions. [2021-11-06 15:15:45,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 15:15:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2651 states and 3816 transitions. [2021-11-06 15:15:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 15:15:45,670 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:45,670 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] [2021-11-06 15:15:45,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 15:15:45,670 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2112247813, now seen corresponding path program 1 times [2021-11-06 15:15:45,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:45,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429315028] [2021-11-06 15:15:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:45,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:45,793 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 15:15:45,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:45,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429315028] [2021-11-06 15:15:45,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429315028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:15:45,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492453849] [2021-11-06 15:15:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:45,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:15:45,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:15:45,798 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 15:15:45,830 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 15:15:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 15:15:46,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:15:46,485 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 15:15:46,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492453849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:15:46,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:15:46,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-06 15:15:46,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851279293] [2021-11-06 15:15:46,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 15:15:46,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 15:15:46,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:15:46,488 INFO L87 Difference]: Start difference. First operand 2651 states and 3816 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 6 states have internal predecessors, (94), 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 15:15:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:47,037 INFO L93 Difference]: Finished difference Result 10476 states and 15110 transitions. [2021-11-06 15:15:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:15:47,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 6 states have internal predecessors, (94), 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 92 [2021-11-06 15:15:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:47,052 INFO L225 Difference]: With dead ends: 10476 [2021-11-06 15:15:47,052 INFO L226 Difference]: Without dead ends: 7863 [2021-11-06 15:15:47,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 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 15:15:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7863 states. [2021-11-06 15:15:47,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7863 to 2654. [2021-11-06 15:15:47,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 1.4398793818318885) internal successors, (3820), 2653 states have internal predecessors, (3820), 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 15:15:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3820 transitions. [2021-11-06 15:15:47,244 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3820 transitions. Word has length 92 [2021-11-06 15:15:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:47,245 INFO L470 AbstractCegarLoop]: Abstraction has 2654 states and 3820 transitions. [2021-11-06 15:15:47,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 6 states have internal predecessors, (94), 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 15:15:47,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3820 transitions. [2021-11-06 15:15:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-06 15:15:47,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:47,249 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] [2021-11-06 15:15:47,282 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 15:15:47,471 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,SelfDestructingSolverStorable9 [2021-11-06 15:15:47,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:47,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:47,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2059389464, now seen corresponding path program 2 times [2021-11-06 15:15:47,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:47,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189530412] [2021-11-06 15:15:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:47,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:47,587 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 15:15:47,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:47,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189530412] [2021-11-06 15:15:47,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189530412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:15:47,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711995844] [2021-11-06 15:15:47,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:15:47,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:15:47,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:15:47,591 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 15:15:47,599 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 15:15:48,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 15:15:48,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:15:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 15:15:48,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:15:48,295 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 15:15:48,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711995844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:48,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:15:48,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-06 15:15:48,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865509085] [2021-11-06 15:15:48,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:15:48,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:15:48,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-06 15:15:48,297 INFO L87 Difference]: Start difference. First operand 2654 states and 3820 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 15:15:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:48,744 INFO L93 Difference]: Finished difference Result 10152 states and 14649 transitions. [2021-11-06 15:15:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:15:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 95 [2021-11-06 15:15:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:48,761 INFO L225 Difference]: With dead ends: 10152 [2021-11-06 15:15:48,761 INFO L226 Difference]: Without dead ends: 7536 [2021-11-06 15:15:48,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 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 15:15:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7536 states. [2021-11-06 15:15:48,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7536 to 2656. [2021-11-06 15:15:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 1.4395480225988702) internal successors, (3822), 2655 states have internal predecessors, (3822), 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 15:15:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3822 transitions. [2021-11-06 15:15:48,949 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3822 transitions. Word has length 95 [2021-11-06 15:15:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:48,949 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 3822 transitions. [2021-11-06 15:15:48,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 15:15:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3822 transitions. [2021-11-06 15:15:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-06 15:15:48,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:48,955 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] [2021-11-06 15:15:48,986 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 15:15:49,179 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,SelfDestructingSolverStorable10 [2021-11-06 15:15:49,179 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:49,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2123909450, now seen corresponding path program 1 times [2021-11-06 15:15:49,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:49,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752396875] [2021-11-06 15:15:49,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:49,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:49,255 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 15:15:49,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:49,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752396875] [2021-11-06 15:15:49,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752396875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:49,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:49,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:15:49,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128492022] [2021-11-06 15:15:49,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:15:49,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:49,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:15:49,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:15:49,258 INFO L87 Difference]: Start difference. First operand 2656 states and 3822 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 15:15:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:49,577 INFO L93 Difference]: Finished difference Result 7728 states and 11146 transitions. [2021-11-06 15:15:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:15:49,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 99 [2021-11-06 15:15:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:49,589 INFO L225 Difference]: With dead ends: 7728 [2021-11-06 15:15:49,589 INFO L226 Difference]: Without dead ends: 5110 [2021-11-06 15:15:49,593 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 15:15:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5110 states. [2021-11-06 15:15:49,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5110 to 2659. [2021-11-06 15:15:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 1.439428141459744) internal successors, (3826), 2658 states have internal predecessors, (3826), 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 15:15:49,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3826 transitions. [2021-11-06 15:15:49,766 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3826 transitions. Word has length 99 [2021-11-06 15:15:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:49,767 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 3826 transitions. [2021-11-06 15:15:49,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 15:15:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3826 transitions. [2021-11-06 15:15:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 15:15:49,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:49,772 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 15:15:49,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 15:15:49,772 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash 152246333, now seen corresponding path program 1 times [2021-11-06 15:15:49,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:49,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875706602] [2021-11-06 15:15:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:49,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:49,962 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 15:15:49,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:49,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875706602] [2021-11-06 15:15:49,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875706602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:49,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:49,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 15:15:49,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600138827] [2021-11-06 15:15:49,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 15:15:49,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:49,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 15:15:49,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:15:49,964 INFO L87 Difference]: Start difference. First operand 2659 states and 3826 transitions. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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 15:15:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:51,074 INFO L93 Difference]: Finished difference Result 14114 states and 20319 transitions. [2021-11-06 15:15:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 15:15:51,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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 15:15:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:51,098 INFO L225 Difference]: With dead ends: 14114 [2021-11-06 15:15:51,098 INFO L226 Difference]: Without dead ends: 11479 [2021-11-06 15:15:51,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 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 15:15:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11479 states. [2021-11-06 15:15:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11479 to 2659. [2021-11-06 15:15:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 1.438675696012039) internal successors, (3824), 2658 states have internal predecessors, (3824), 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 15:15:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3824 transitions. [2021-11-06 15:15:51,307 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3824 transitions. Word has length 103 [2021-11-06 15:15:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:51,307 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 3824 transitions. [2021-11-06 15:15:51,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 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 15:15:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3824 transitions. [2021-11-06 15:15:51,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-06 15:15:51,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:51,311 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 15:15:51,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 15:15:51,312 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:51,312 INFO L85 PathProgramCache]: Analyzing trace with hash 439554233, now seen corresponding path program 1 times [2021-11-06 15:15:51,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:51,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617853816] [2021-11-06 15:15:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:51,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:51,400 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 15:15:51,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:51,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617853816] [2021-11-06 15:15:51,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617853816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:51,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:51,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 15:15:51,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128226993] [2021-11-06 15:15:51,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:15:51,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:15:51,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:15:51,402 INFO L87 Difference]: Start difference. First operand 2659 states and 3824 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 15:15:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:52,703 INFO L93 Difference]: Finished difference Result 17772 states and 25673 transitions. [2021-11-06 15:15:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 15:15:52,704 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 15:15:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:52,725 INFO L225 Difference]: With dead ends: 17772 [2021-11-06 15:15:52,726 INFO L226 Difference]: Without dead ends: 15151 [2021-11-06 15:15:52,731 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 15:15:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15151 states. [2021-11-06 15:15:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15151 to 2662. [2021-11-06 15:15:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 1.4381811349116873) internal successors, (3827), 2661 states have internal predecessors, (3827), 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 15:15:52,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3827 transitions. [2021-11-06 15:15:52,957 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3827 transitions. Word has length 105 [2021-11-06 15:15:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:52,957 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 3827 transitions. [2021-11-06 15:15:52,958 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 15:15:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3827 transitions. [2021-11-06 15:15:52,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-06 15:15:52,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:52,962 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] [2021-11-06 15:15:52,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 15:15:52,962 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:52,963 INFO L85 PathProgramCache]: Analyzing trace with hash 744467261, now seen corresponding path program 1 times [2021-11-06 15:15:52,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:52,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144632223] [2021-11-06 15:15:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:52,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:53,186 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 15:15:53,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:53,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144632223] [2021-11-06 15:15:53,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144632223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:53,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:53,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 15:15:53,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557992180] [2021-11-06 15:15:53,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:15:53,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:15:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:15:53,189 INFO L87 Difference]: Start difference. First operand 2662 states and 3827 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 15:15:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:15:53,734 INFO L93 Difference]: Finished difference Result 7905 states and 11382 transitions. [2021-11-06 15:15:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 15:15:53,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 107 [2021-11-06 15:15:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:15:53,742 INFO L225 Difference]: With dead ends: 7905 [2021-11-06 15:15:53,743 INFO L226 Difference]: Without dead ends: 5271 [2021-11-06 15:15:53,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 15:15:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5271 states. [2021-11-06 15:15:53,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5271 to 2662. [2021-11-06 15:15:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2661 states have (on average 1.4374295377677564) internal successors, (3825), 2661 states have internal predecessors, (3825), 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 15:15:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3825 transitions. [2021-11-06 15:15:53,968 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3825 transitions. Word has length 107 [2021-11-06 15:15:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:15:53,968 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 3825 transitions. [2021-11-06 15:15:53,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 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 15:15:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3825 transitions. [2021-11-06 15:15:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-06 15:15:53,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:15:53,974 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] [2021-11-06 15:15:53,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 15:15:53,974 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:15:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:15:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash -706558720, now seen corresponding path program 1 times [2021-11-06 15:15:53,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:15:53,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066963963] [2021-11-06 15:15:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:15:53,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:15:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:15:55,526 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 15:15:55,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:15:55,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066963963] [2021-11-06 15:15:55,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066963963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:15:55,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:15:55,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-06 15:15:55,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677599035] [2021-11-06 15:15:55,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-06 15:15:55,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:15:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-06 15:15:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-11-06 15:15:55,528 INFO L87 Difference]: Start difference. First operand 2662 states and 3825 transitions. Second operand has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 28 states have internal predecessors, (107), 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 15:27:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:27:22,056 INFO L93 Difference]: Finished difference Result 254322 states and 375298 transitions. [2021-11-06 15:27:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1084 states. [2021-11-06 15:27:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 28 states have internal predecessors, (107), 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 107 [2021-11-06 15:27:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:27:23,045 INFO L225 Difference]: With dead ends: 254322 [2021-11-06 15:27:23,045 INFO L226 Difference]: Without dead ends: 254320 [2021-11-06 15:27:23,381 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 1105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587309 ImplicationChecksByTransitivity, 68.7s TimeCoverageRelationStatistics Valid=93202, Invalid=1131140, Unknown=0, NotChecked=0, Total=1224342 [2021-11-06 15:27:23,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254320 states. [2021-11-06 15:27:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254320 to 4509. [2021-11-06 15:27:26,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4509 states, 4508 states have (on average 1.4421029281277729) internal successors, (6501), 4508 states have internal predecessors, (6501), 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 15:27:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4509 states to 4509 states and 6501 transitions. [2021-11-06 15:27:26,455 INFO L78 Accepts]: Start accepts. Automaton has 4509 states and 6501 transitions. Word has length 107 [2021-11-06 15:27:26,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:27:26,456 INFO L470 AbstractCegarLoop]: Abstraction has 4509 states and 6501 transitions. [2021-11-06 15:27:26,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 28 states have internal predecessors, (107), 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 15:27:26,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4509 states and 6501 transitions. [2021-11-06 15:27:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-06 15:27:26,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:27:26,464 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] [2021-11-06 15:27:26,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 15:27:26,465 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:27:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:27:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1024027878, now seen corresponding path program 1 times [2021-11-06 15:27:26,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:27:26,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585067984] [2021-11-06 15:27:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:27:26,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:27:26,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:27:26,526 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 15:27:26,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:27:26,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585067984] [2021-11-06 15:27:26,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585067984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:27:26,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:27:26,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:27:26,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401797743] [2021-11-06 15:27:26,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:27:26,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:27:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:27:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:27:26,528 INFO L87 Difference]: Start difference. First operand 4509 states and 6501 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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 15:27:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:27:29,132 INFO L93 Difference]: Finished difference Result 13010 states and 18804 transitions. [2021-11-06 15:27:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:27:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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 108 [2021-11-06 15:27:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:27:29,142 INFO L225 Difference]: With dead ends: 13010 [2021-11-06 15:27:29,143 INFO L226 Difference]: Without dead ends: 8539 [2021-11-06 15:27:29,149 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 15:27:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8539 states. [2021-11-06 15:27:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8539 to 4497. [2021-11-06 15:27:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4497 states, 4496 states have (on average 1.4415035587188612) internal successors, (6481), 4496 states have internal predecessors, (6481), 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 15:27:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 6481 transitions. [2021-11-06 15:27:30,371 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 6481 transitions. Word has length 108 [2021-11-06 15:27:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:27:30,371 INFO L470 AbstractCegarLoop]: Abstraction has 4497 states and 6481 transitions. [2021-11-06 15:27:30,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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 15:27:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 6481 transitions. [2021-11-06 15:27:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-06 15:27:30,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:27:30,378 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:27:30,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 15:27:30,378 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:27:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:27:30,379 INFO L85 PathProgramCache]: Analyzing trace with hash -765216987, now seen corresponding path program 1 times [2021-11-06 15:27:30,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:27:30,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009665199] [2021-11-06 15:27:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:27:30,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:27:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:27:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:27:30,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:27:30,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009665199] [2021-11-06 15:27:30,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009665199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:27:30,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:27:30,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-06 15:27:30,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874650707] [2021-11-06 15:27:30,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 15:27:30,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:27:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 15:27:30,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-06 15:27:30,791 INFO L87 Difference]: Start difference. First operand 4497 states and 6481 transitions. Second operand has 13 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 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 15:28:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:28:53,443 INFO L93 Difference]: Finished difference Result 70322 states and 103642 transitions. [2021-11-06 15:28:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2021-11-06 15:28:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 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 110 [2021-11-06 15:28:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:28:53,547 INFO L225 Difference]: With dead ends: 70322 [2021-11-06 15:28:53,548 INFO L226 Difference]: Without dead ends: 65863 [2021-11-06 15:28:53,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10192 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3910, Invalid=21530, Unknown=0, NotChecked=0, Total=25440 [2021-11-06 15:28:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65863 states. [2021-11-06 15:28:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65863 to 6243. [2021-11-06 15:28:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6243 states, 6242 states have (on average 1.4621916052547261) internal successors, (9127), 6242 states have internal predecessors, (9127), 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 15:28:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6243 states to 6243 states and 9127 transitions. [2021-11-06 15:28:55,614 INFO L78 Accepts]: Start accepts. Automaton has 6243 states and 9127 transitions. Word has length 110 [2021-11-06 15:28:55,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:28:55,614 INFO L470 AbstractCegarLoop]: Abstraction has 6243 states and 9127 transitions. [2021-11-06 15:28:55,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 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 15:28:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6243 states and 9127 transitions. [2021-11-06 15:28:55,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-06 15:28:55,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:28:55,636 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] [2021-11-06 15:28:55,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-06 15:28:55,636 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 15:28:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:28:55,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1742088334, now seen corresponding path program 1 times [2021-11-06 15:28:55,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:28:55,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871399387] [2021-11-06 15:28:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:28:55,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:28:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:28:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:28:59,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:28:59,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871399387] [2021-11-06 15:28:59,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871399387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:28:59,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336707057] [2021-11-06 15:28:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:28:59,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:28:59,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:28:59,846 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 15:28:59,846 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 15:29:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:29:00,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-06 15:29:00,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:29:00,708 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 15:29:01,026 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-06 15:29:01,026 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 15:29:01,638 INFO L354 Elim1Store]: treesize reduction 94, result has 17.5 percent of original size [2021-11-06 15:29:01,638 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 6 case distinctions, treesize of input 35 treesize of output 44 [2021-11-06 15:29:02,328 INFO L354 Elim1Store]: treesize reduction 72, result has 11.1 percent of original size [2021-11-06 15:29:02,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 52 [2021-11-06 15:29:02,607 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 15:29:02,803 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 15:29:02,814 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 15:29:02,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:02,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:02,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:02,827 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 15:29:02,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:02,965 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 15:29:02,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:02,971 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 15:29:02,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:02,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:02,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:02,991 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 15:29:03,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,138 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 15:29:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,156 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 15:29:03,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:03,183 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 15:29:03,626 INFO L354 Elim1Store]: treesize reduction 316, result has 10.5 percent of original size [2021-11-06 15:29:03,627 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 5 case distinctions, treesize of input 223 treesize of output 201 [2021-11-06 15:29:03,741 INFO L354 Elim1Store]: treesize reduction 316, result has 10.5 percent of original size [2021-11-06 15:29:03,741 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 5 case distinctions, treesize of input 189 treesize of output 179 [2021-11-06 15:29:03,842 INFO L354 Elim1Store]: treesize reduction 678, result has 8.3 percent of original size [2021-11-06 15:29:03,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 172 treesize of output 155 [2021-11-06 15:29:04,538 INFO L354 Elim1Store]: treesize reduction 210, result has 17.6 percent of original size [2021-11-06 15:29:04,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 238 treesize of output 233 [2021-11-06 15:29:04,639 INFO L354 Elim1Store]: treesize reduction 220, result has 13.7 percent of original size [2021-11-06 15:29:04,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 233 treesize of output 230 [2021-11-06 15:29:04,694 INFO L354 Elim1Store]: treesize reduction 308, result has 14.0 percent of original size [2021-11-06 15:29:04,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 218 treesize of output 214 [2021-11-06 15:29:04,705 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-06 15:29:04,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 199 treesize of output 195 [2021-11-06 15:29:04,978 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-06 15:29:04,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 65 treesize of output 61 [2021-11-06 15:29:04,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:04,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,013 INFO L354 Elim1Store]: treesize reduction 115, result has 11.5 percent of original size [2021-11-06 15:29:05,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 133 treesize of output 144 [2021-11-06 15:29:05,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 110 [2021-11-06 15:29:05,408 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-06 15:29:05,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 65 treesize of output 61 [2021-11-06 15:29:05,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,467 INFO L354 Elim1Store]: treesize reduction 232, result has 9.7 percent of original size [2021-11-06 15:29:05,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 139 treesize of output 153 [2021-11-06 15:29:05,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:05,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 125 [2021-11-06 15:29:07,512 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-06 15:29:07,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 65 treesize of output 61 [2021-11-06 15:29:07,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,610 INFO L354 Elim1Store]: treesize reduction 302, result has 10.4 percent of original size [2021-11-06 15:29:07,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 160 treesize of output 190 [2021-11-06 15:29:07,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 156 [2021-11-06 15:29:08,724 INFO L354 Elim1Store]: treesize reduction 200, result has 15.6 percent of original size [2021-11-06 15:29:08,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 65 treesize of output 61 [2021-11-06 15:29:08,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 152 [2021-11-06 15:29:08,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-06 15:29:08,790 INFO L354 Elim1Store]: treesize reduction 180, result has 7.7 percent of original size [2021-11-06 15:29:08,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 143 treesize of output 163 [2021-11-06 15:29:09,980 INFO L354 Elim1Store]: treesize reduction 496, result has 12.4 percent of original size [2021-11-06 15:29:09,980 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 694 treesize of output 519 [2021-11-06 15:29:09,995 INFO L354 Elim1Store]: treesize reduction 232, result has 0.4 percent of original size [2021-11-06 15:29:09,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 675 treesize of output 402 [2021-11-06 15:29:10,070 INFO L354 Elim1Store]: treesize reduction 272, result has 12.3 percent of original size [2021-11-06 15:29:10,071 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 9 new quantified variables, introduced 15 case distinctions, treesize of input 387 treesize of output 275 [2021-11-06 15:29:10,081 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-06 15:29:10,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 282 treesize of output 205 [2021-11-06 15:29:10,093 INFO L354 Elim1Store]: treesize reduction 416, result has 0.2 percent of original size [2021-11-06 15:29:10,094 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 244 treesize of output 168 [2021-11-06 15:29:10,113 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 15:29:10,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336707057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:29:10,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:29:10,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [35] total 64 [2021-11-06 15:29:10,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527138752] [2021-11-06 15:29:10,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-06 15:29:10,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:29:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-06 15:29:10,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3861, Unknown=3, NotChecked=0, Total=4032 [2021-11-06 15:29:10,115 INFO L87 Difference]: Start difference. First operand 6243 states and 9127 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 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