./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.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-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.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 384d76f2b579c3776890746933030ac5fcfc9487f32fbc530ea50ee4dc8551b1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 20:21:13,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 20:21:13,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 20:21:13,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 20:21:13,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 20:21:13,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 20:21:13,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 20:21:13,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 20:21:13,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 20:21:13,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 20:21:13,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 20:21:13,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 20:21:13,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 20:21:13,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 20:21:13,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 20:21:13,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 20:21:13,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 20:21:13,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 20:21:13,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 20:21:13,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 20:21:13,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 20:21:13,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 20:21:13,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 20:21:13,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 20:21:13,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 20:21:13,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 20:21:13,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 20:21:13,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 20:21:13,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 20:21:13,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 20:21:13,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 20:21:13,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 20:21:13,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 20:21:13,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 20:21:13,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 20:21:13,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 20:21:13,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 20:21:13,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 20:21:13,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 20:21:13,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 20:21:13,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 20:21:13,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 20:21:13,158 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 20:21:13,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 20:21:13,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 20:21:13,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 20:21:13,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 20:21:13,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 20:21:13,160 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 20:21:13,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 20:21:13,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 20:21:13,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 20:21:13,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 20:21:13,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 20:21:13,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 20:21:13,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 20:21:13,161 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 20:21:13,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 20:21:13,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 20:21:13,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 20:21:13,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 20:21:13,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 20:21:13,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 20:21:13,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 20:21:13,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 20:21:13,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 20:21:13,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 20:21:13,163 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 20:21:13,163 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 20:21:13,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 20:21:13,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 20:21:13,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 384d76f2b579c3776890746933030ac5fcfc9487f32fbc530ea50ee4dc8551b1 [2021-11-06 20:21:13,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 20:21:13,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 20:21:13,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 20:21:13,353 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 20:21:13,354 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 20:21:13,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i [2021-11-06 20:21:13,406 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ffbc754/375e056bfe5249a0861d53fe874f7c01/FLAG7c6d51d76 [2021-11-06 20:21:14,022 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 20:21:14,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i [2021-11-06 20:21:14,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ffbc754/375e056bfe5249a0861d53fe874f7c01/FLAG7c6d51d76 [2021-11-06 20:21:14,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9ffbc754/375e056bfe5249a0861d53fe874f7c01 [2021-11-06 20:21:14,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 20:21:14,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 20:21:14,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 20:21:14,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 20:21:14,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 20:21:14,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:21:14" (1/1) ... [2021-11-06 20:21:14,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de282f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:14, skipping insertion in model container [2021-11-06 20:21:14,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:21:14" (1/1) ... [2021-11-06 20:21:14,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 20:21:14,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 20:21:15,885 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-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i[269359,269372] [2021-11-06 20:21:15,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 20:21:15,943 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 20:21:16,168 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-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i[269359,269372] [2021-11-06 20:21:16,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 20:21:16,257 INFO L208 MainTranslator]: Completed translation [2021-11-06 20:21:16,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16 WrapperNode [2021-11-06 20:21:16,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 20:21:16,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 20:21:16,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 20:21:16,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 20:21:16,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:16,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:19,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 20:21:19,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 20:21:19,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 20:21:19,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 20:21:19,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:19,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:20,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:20,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:21,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:22,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:22,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:23,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 20:21:23,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 20:21:23,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 20:21:23,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 20:21:23,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (1/1) ... [2021-11-06 20:21:23,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 20:21:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 20:21:23,380 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 20:21:23,381 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 20:21:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 20:21:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 20:21:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 20:21:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 20:21:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 20:21:23,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 20:21:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 20:21:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 20:21:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 20:21:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 20:21:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 20:21:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 20:21:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 20:21:23,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 20:21:23,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 20:31:48,243 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#4: ldv_switch_1_#res := 0; [2021-11-06 20:31:48,243 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#2: ldv_switch_1_#res := 0; [2021-11-06 20:31:48,243 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#3: ldv_switch_1_#res := 0; [2021-11-06 20:31:48,244 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0; [2021-11-06 20:31:48,244 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_4_switch_break#2: ldv_switch_4_#res := 0; [2021-11-06 20:31:48,244 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break#2: ldv_switch_0_#res := 0; [2021-11-06 20:31:48,245 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_3_switch_break#2: ldv_switch_3_#res := 0; [2021-11-06 20:31:48,245 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break: ldv_switch_2_#res := 0; [2021-11-06 20:31:48,248 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-06 20:31:48,252 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0; [2021-11-06 20:31:48,254 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_4_switch_break: ldv_switch_4_#res := 0; [2021-11-06 20:31:48,254 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_3_switch_break: ldv_switch_3_#res := 0; [2021-11-06 20:31:48,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 20:31:48,331 INFO L299 CfgBuilder]: Removed 32180 assume(true) statements. [2021-11-06 20:31:48,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:48 BoogieIcfgContainer [2021-11-06 20:31:48,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 20:31:48,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 20:31:48,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 20:31:48,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 20:31:48,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:21:14" (1/3) ... [2021-11-06 20:31:48,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9b24fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:48, skipping insertion in model container [2021-11-06 20:31:48,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:21:16" (2/3) ... [2021-11-06 20:31:48,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9b24fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:48, skipping insertion in model container [2021-11-06 20:31:48,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:48" (3/3) ... [2021-11-06 20:31:48,356 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i [2021-11-06 20:31:48,359 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 20:31:48,359 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-06 20:31:48,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 20:31:48,441 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 20:31:48,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-06 20:31:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 23794 states, 23788 states have (on average 1.3248276441903482) internal successors, (31515), 23793 states have internal predecessors, (31515), 0 states have call successors, (0), 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 20:31:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-06 20:31:48,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:31:48,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 20:31:48,669 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 20:31:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:31:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1215946867, now seen corresponding path program 1 times [2021-11-06 20:31:48,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:31:48,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286154841] [2021-11-06 20:31:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:31:48,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:31:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:31:49,320 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 20:31:49,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:31:49,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286154841] [2021-11-06 20:31:49,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286154841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:31:49,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:31:49,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:31:49,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094940168] [2021-11-06 20:31:49,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:31:49,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:31:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:31:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:31:49,387 INFO L87 Difference]: Start difference. First operand has 23794 states, 23788 states have (on average 1.3248276441903482) internal successors, (31515), 23793 states have internal predecessors, (31515), 0 states have call successors, (0), 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 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 20:31:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:31:53,032 INFO L93 Difference]: Finished difference Result 71052 states and 94123 transitions. [2021-11-06 20:31:53,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:31:53,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-11-06 20:31:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:31:53,201 INFO L225 Difference]: With dead ends: 71052 [2021-11-06 20:31:53,202 INFO L226 Difference]: Without dead ends: 46166 [2021-11-06 20:31:53,261 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 20:31:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46166 states. [2021-11-06 20:31:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46166 to 46166. [2021-11-06 20:31:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46166 states, 46160 states have (on average 1.3051993067590988) internal successors, (60248), 46165 states have internal predecessors, (60248), 0 states have call successors, (0), 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 20:31:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46166 states to 46166 states and 60248 transitions. [2021-11-06 20:31:54,284 INFO L78 Accepts]: Start accepts. Automaton has 46166 states and 60248 transitions. Word has length 52 [2021-11-06 20:31:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:31:54,284 INFO L470 AbstractCegarLoop]: Abstraction has 46166 states and 60248 transitions. [2021-11-06 20:31:54,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 20:31:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 46166 states and 60248 transitions. [2021-11-06 20:31:54,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 20:31:54,296 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:31:54,297 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 20:31:54,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 20:31:54,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 20:31:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:31:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash 310811384, now seen corresponding path program 1 times [2021-11-06 20:31:54,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:31:54,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680442049] [2021-11-06 20:31:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:31:54,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:31:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:31:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 20:31:54,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:31:54,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680442049] [2021-11-06 20:31:54,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680442049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:31:54,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:31:54,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:31:54,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667817697] [2021-11-06 20:31:54,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:31:54,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:31:54,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:31:54,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:31:54,583 INFO L87 Difference]: Start difference. First operand 46166 states and 60248 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) 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 20:31:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:31:58,198 INFO L93 Difference]: Finished difference Result 92238 states and 120398 transitions. [2021-11-06 20:31:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:31:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) 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 83 [2021-11-06 20:31:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:31:58,361 INFO L225 Difference]: With dead ends: 92238 [2021-11-06 20:31:58,362 INFO L226 Difference]: Without dead ends: 69159 [2021-11-06 20:31:58,427 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 20:31:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69159 states. [2021-11-06 20:31:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69159 to 69159. [2021-11-06 20:31:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69159 states, 69153 states have (on average 1.3053808222347547) internal successors, (90271), 69158 states have internal predecessors, (90271), 0 states have call successors, (0), 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 20:31:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69159 states to 69159 states and 90271 transitions. [2021-11-06 20:31:59,841 INFO L78 Accepts]: Start accepts. Automaton has 69159 states and 90271 transitions. Word has length 83 [2021-11-06 20:31:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:31:59,841 INFO L470 AbstractCegarLoop]: Abstraction has 69159 states and 90271 transitions. [2021-11-06 20:31:59,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) 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 20:31:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 69159 states and 90271 transitions. [2021-11-06 20:31:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 20:31:59,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:31:59,855 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 20:31:59,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 20:31:59,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 20:31:59,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:31:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash -710256970, now seen corresponding path program 1 times [2021-11-06 20:31:59,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:31:59,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225276108] [2021-11-06 20:31:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:31:59,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:31:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:32:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 20:32:00,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:32:00,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225276108] [2021-11-06 20:32:00,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225276108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:32:00,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:32:00,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:32:00,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425689898] [2021-11-06 20:32:00,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:32:00,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:32:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:32:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:32:00,089 INFO L87 Difference]: Start difference. First operand 69159 states and 90271 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) 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 20:32:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:32:03,708 INFO L93 Difference]: Finished difference Result 138225 states and 180446 transitions. [2021-11-06 20:32:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:32:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) 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 83 [2021-11-06 20:32:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:32:03,885 INFO L225 Difference]: With dead ends: 138225 [2021-11-06 20:32:03,886 INFO L226 Difference]: Without dead ends: 92153 [2021-11-06 20:32:03,974 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 20:32:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92153 states. [2021-11-06 20:32:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92153 to 92153. [2021-11-06 20:32:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92153 states, 92147 states have (on average 1.305468436302864) internal successors, (120295), 92152 states have internal predecessors, (120295), 0 states have call successors, (0), 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 20:32:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92153 states to 92153 states and 120295 transitions. [2021-11-06 20:32:05,790 INFO L78 Accepts]: Start accepts. Automaton has 92153 states and 120295 transitions. Word has length 83 [2021-11-06 20:32:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:32:05,790 INFO L470 AbstractCegarLoop]: Abstraction has 92153 states and 120295 transitions. [2021-11-06 20:32:05,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) 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 20:32:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 92153 states and 120295 transitions. [2021-11-06 20:32:05,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-06 20:32:05,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:32:05,804 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 20:32:05,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 20:32:05,804 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-06 20:32:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:32:05,805 INFO L85 PathProgramCache]: Analyzing trace with hash -16825872, now seen corresponding path program 1 times [2021-11-06 20:32:05,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:32:05,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296913186] [2021-11-06 20:32:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:32:05,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:32:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:32:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-06 20:32:06,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:32:06,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296913186] [2021-11-06 20:32:06,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296913186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:32:06,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:32:06,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:32:06,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533041266] [2021-11-06 20:32:06,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 20:32:06,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:32:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 20:32:06,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 20:32:06,174 INFO L87 Difference]: Start difference. First operand 92153 states and 120295 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)