./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-ethernet-ethoc.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-ethernet-ethoc.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 2d96d66163c8e8d61a2fa90f8dc8359a87f83533e82cd74c25a40ad0f5e1f460 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 20:22:05,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 20:22:05,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 20:22:05,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 20:22:05,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 20:22:05,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 20:22:05,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 20:22:05,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 20:22:05,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 20:22:05,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 20:22:05,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 20:22:05,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 20:22:05,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 20:22:05,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 20:22:05,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 20:22:05,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 20:22:05,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 20:22:05,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 20:22:05,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 20:22:05,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 20:22:05,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 20:22:05,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 20:22:05,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 20:22:05,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 20:22:05,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 20:22:05,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 20:22:05,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 20:22:05,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 20:22:05,706 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 20:22:05,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 20:22:05,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 20:22:05,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 20:22:05,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 20:22:05,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 20:22:05,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 20:22:05,710 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 20:22:05,711 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 20:22:05,711 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 20:22:05,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 20:22:05,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 20:22:05,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 20:22:05,713 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 20:22:05,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 20:22:05,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 20:22:05,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 20:22:05,737 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 20:22:05,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 20:22:05,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 20:22:05,738 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 20:22:05,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 20:22:05,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 20:22:05,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 20:22:05,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 20:22:05,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 20:22:05,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 20:22:05,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 20:22:05,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 20:22:05,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 20:22:05,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 20:22:05,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 20:22:05,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 20:22:05,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 20:22:05,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 20:22:05,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 20:22:05,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 20:22:05,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 20:22:05,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 20:22:05,742 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 20:22:05,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 20:22:05,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 20:22:05,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 20:22:05,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d96d66163c8e8d61a2fa90f8dc8359a87f83533e82cd74c25a40ad0f5e1f460 [2021-11-06 20:22:05,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 20:22:05,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 20:22:05,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 20:22:05,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 20:22:05,976 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 20:22:05,976 INFO L432 ainManager$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-ethernet-ethoc.cil.i [2021-11-06 20:22:06,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96a7084be/59589d8fe6814ca4906561e37146f725/FLAG008978a0f [2021-11-06 20:22:06,688 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 20:22:06,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.i [2021-11-06 20:22:06,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96a7084be/59589d8fe6814ca4906561e37146f725/FLAG008978a0f [2021-11-06 20:22:07,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96a7084be/59589d8fe6814ca4906561e37146f725 [2021-11-06 20:22:07,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 20:22:07,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 20:22:07,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 20:22:07,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 20:22:07,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 20:22:07,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:22:07" (1/1) ... [2021-11-06 20:22:07,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e3b5af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:07, skipping insertion in model container [2021-11-06 20:22:07,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:22:07" (1/1) ... [2021-11-06 20:22:07,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 20:22:07,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 20:22:08,526 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-ethernet-ethoc.cil.i[282309,282322] [2021-11-06 20:22:08,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 20:22:08,593 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 20:22:08,835 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-ethernet-ethoc.cil.i[282309,282322] [2021-11-06 20:22:08,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 20:22:08,942 INFO L208 MainTranslator]: Completed translation [2021-11-06 20:22:08,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08 WrapperNode [2021-11-06 20:22:08,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 20:22:08,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 20:22:08,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 20:22:08,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 20:22:08,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:09,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:11,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 20:22:11,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 20:22:11,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 20:22:11,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 20:22:11,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:11,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:11,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:11,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:12,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:12,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:12,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:13,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 20:22:13,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 20:22:13,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 20:22:13,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 20:22:13,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (1/1) ... [2021-11-06 20:22:13,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 20:22:13,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 20:22:13,154 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 20:22:13,190 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 20:22:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 20:22:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 20:22:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-06 20:22:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 20:22:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 20:22:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 20:22:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 20:22:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 20:22:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 20:22:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 20:22:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 20:22:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 20:22:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 20:22:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 20:22:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 20:22:13,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 20:22:13,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 20:23:22,593 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#2: ldv_switch_1_#res := 0; [2021-11-06 20:23:22,594 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#2: ldv_switch_2_#res := 0; [2021-11-06 20:23:22,594 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#3: ldv_switch_2_#res := 0; [2021-11-06 20:23:22,594 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#4: ldv_switch_2_#res := 0; [2021-11-06 20:23:22,594 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0; [2021-11-06 20:23:22,594 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break#2: ldv_switch_0_#res := 0; [2021-11-06 20:23:22,596 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break: ldv_switch_2_#res := 0; [2021-11-06 20:23:22,597 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-06 20:23:22,597 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_3_switch_break: ldv_switch_3_#res := 0; [2021-11-06 20:23:22,598 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0; [2021-11-06 20:23:22,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 20:23:22,641 INFO L299 CfgBuilder]: Removed 20127 assume(true) statements. [2021-11-06 20:23:22,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:23:22 BoogieIcfgContainer [2021-11-06 20:23:22,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 20:23:22,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 20:23:22,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 20:23:22,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 20:23:22,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:22:07" (1/3) ... [2021-11-06 20:23:22,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c038913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:23:22, skipping insertion in model container [2021-11-06 20:23:22,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:22:08" (2/3) ... [2021-11-06 20:23:22,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c038913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:23:22, skipping insertion in model container [2021-11-06 20:23:22,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:23:22" (3/3) ... [2021-11-06 20:23:22,657 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-ethernet-ethoc.cil.i [2021-11-06 20:23:22,661 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 20:23:22,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-06 20:23:22,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 20:23:22,748 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 20:23:22,749 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-06 20:23:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 15154 states, 15150 states have (on average 1.263960396039604) internal successors, (19149), 15153 states have internal predecessors, (19149), 0 states have call successors, (0), 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 20:23:22,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-06 20:23:22,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:23:22,904 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] [2021-11-06 20:23:22,904 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 20:23:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:23:22,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1966860879, now seen corresponding path program 1 times [2021-11-06 20:23:22,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:23:22,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285601891] [2021-11-06 20:23:22,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:23:22,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:23:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:23:23,410 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 20:23:23,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:23:23,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285601891] [2021-11-06 20:23:23,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285601891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:23:23,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:23:23,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:23:23,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048271045] [2021-11-06 20:23:23,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:23:23,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:23:23,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:23:23,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:23:23,462 INFO L87 Difference]: Start difference. First operand has 15154 states, 15150 states have (on average 1.263960396039604) internal successors, (19149), 15153 states have internal predecessors, (19149), 0 states have call successors, (0), 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 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 20:23:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:23:26,670 INFO L93 Difference]: Finished difference Result 45110 states and 56980 transitions. [2021-11-06 20:23:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:23:26,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-06 20:23:26,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:23:26,799 INFO L225 Difference]: With dead ends: 45110 [2021-11-06 20:23:26,799 INFO L226 Difference]: Without dead ends: 27803 [2021-11-06 20:23:26,837 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 20:23:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27803 states. [2021-11-06 20:23:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27803 to 27803. [2021-11-06 20:23:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27803 states, 27799 states have (on average 1.198928018993489) internal successors, (33329), 27802 states have internal predecessors, (33329), 0 states have call successors, (0), 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 20:23:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27803 states to 27803 states and 33329 transitions. [2021-11-06 20:23:27,668 INFO L78 Accepts]: Start accepts. Automaton has 27803 states and 33329 transitions. Word has length 51 [2021-11-06 20:23:27,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:23:27,670 INFO L470 AbstractCegarLoop]: Abstraction has 27803 states and 33329 transitions. [2021-11-06 20:23:27,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 20:23:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 27803 states and 33329 transitions. [2021-11-06 20:23:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-06 20:23:27,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:23:27,681 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] [2021-11-06 20:23:27,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 20:23:27,681 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 20:23:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:23:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1327347972, now seen corresponding path program 1 times [2021-11-06 20:23:27,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:23:27,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971202514] [2021-11-06 20:23:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:23:27,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:23:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:23:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 20:23:27,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:23:27,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971202514] [2021-11-06 20:23:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971202514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:23:27,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:23:27,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:23:27,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151315545] [2021-11-06 20:23:27,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:23:27,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:23:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:23:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:23:27,905 INFO L87 Difference]: Start difference. First operand 27803 states and 33329 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 20:23:30,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:23:30,848 INFO L93 Difference]: Finished difference Result 55504 states and 66544 transitions. [2021-11-06 20:23:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:23:30,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-11-06 20:23:30,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:23:30,937 INFO L225 Difference]: With dead ends: 55504 [2021-11-06 20:23:30,937 INFO L226 Difference]: Without dead ends: 41628 [2021-11-06 20:23:30,973 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 20:23:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41628 states. [2021-11-06 20:23:31,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41628 to 41628. [2021-11-06 20:23:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41628 states, 41624 states have (on average 1.1990438208725736) internal successors, (49909), 41627 states have internal predecessors, (49909), 0 states have call successors, (0), 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 20:23:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41628 states to 41628 states and 49909 transitions. [2021-11-06 20:23:31,801 INFO L78 Accepts]: Start accepts. Automaton has 41628 states and 49909 transitions. Word has length 76 [2021-11-06 20:23:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:23:31,802 INFO L470 AbstractCegarLoop]: Abstraction has 41628 states and 49909 transitions. [2021-11-06 20:23:31,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 20:23:31,802 INFO L276 IsEmpty]: Start isEmpty. Operand 41628 states and 49909 transitions. [2021-11-06 20:23:31,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-06 20:23:31,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:23:31,807 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] [2021-11-06 20:23:31,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 20:23:31,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 20:23:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:23:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1069182534, now seen corresponding path program 1 times [2021-11-06 20:23:31,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:23:31,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257941560] [2021-11-06 20:23:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:23:31,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:23:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:23:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 20:23:32,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:23:32,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257941560] [2021-11-06 20:23:32,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257941560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:23:32,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:23:32,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:23:32,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765928635] [2021-11-06 20:23:32,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 20:23:32,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:23:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 20:23:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 20:23:32,045 INFO L87 Difference]: Start difference. First operand 41628 states and 49909 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 20:23:33,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:23:33,156 INFO L93 Difference]: Finished difference Result 83156 states and 99706 transitions. [2021-11-06 20:23:33,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 20:23:33,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 76 [2021-11-06 20:23:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:23:33,337 INFO L225 Difference]: With dead ends: 83156 [2021-11-06 20:23:33,338 INFO L226 Difference]: Without dead ends: 83152 [2021-11-06 20:23:33,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 20:23:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83152 states. [2021-11-06 20:23:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83152 to 83144. [2021-11-06 20:23:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83144 states, 83140 states have (on average 1.1991339908587924) internal successors, (99696), 83143 states have internal predecessors, (99696), 0 states have call successors, (0), 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 20:23:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83144 states to 83144 states and 99696 transitions. [2021-11-06 20:23:34,988 INFO L78 Accepts]: Start accepts. Automaton has 83144 states and 99696 transitions. Word has length 76 [2021-11-06 20:23:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:23:34,989 INFO L470 AbstractCegarLoop]: Abstraction has 83144 states and 99696 transitions. [2021-11-06 20:23:34,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 20:23:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 83144 states and 99696 transitions. [2021-11-06 20:23:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-06 20:23:34,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:23:34,995 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] [2021-11-06 20:23:34,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 20:23:34,995 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 20:23:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:23:34,996 INFO L85 PathProgramCache]: Analyzing trace with hash -987091907, now seen corresponding path program 1 times [2021-11-06 20:23:34,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:23:34,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444219627] [2021-11-06 20:23:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:23:34,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:23:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:23:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 20:23:35,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:23:35,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444219627] [2021-11-06 20:23:35,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444219627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:23:35,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:23:35,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:23:35,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634630981] [2021-11-06 20:23:35,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 20:23:35,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:23:35,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 20:23:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 20:23:35,191 INFO L87 Difference]: Start difference. First operand 83144 states and 99696 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 20:23:36,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:23:36,585 INFO L93 Difference]: Finished difference Result 83144 states and 99696 transitions. [2021-11-06 20:23:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 20:23:36,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 78 [2021-11-06 20:23:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:23:36,736 INFO L225 Difference]: With dead ends: 83144 [2021-11-06 20:23:36,736 INFO L226 Difference]: Without dead ends: 83120 [2021-11-06 20:23:36,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 20:23:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83120 states. [2021-11-06 20:23:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83120 to 83120. [2021-11-06 20:23:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83120 states, 83118 states have (on average 1.1991265429870785) internal successors, (99669), 83119 states have internal predecessors, (99669), 0 states have call successors, (0), 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 20:23:38,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83120 states to 83120 states and 99669 transitions. [2021-11-06 20:23:38,337 INFO L78 Accepts]: Start accepts. Automaton has 83120 states and 99669 transitions. Word has length 78 [2021-11-06 20:23:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:23:38,337 INFO L470 AbstractCegarLoop]: Abstraction has 83120 states and 99669 transitions. [2021-11-06 20:23:38,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 20:23:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 83120 states and 99669 transitions. [2021-11-06 20:23:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-06 20:23:38,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:23:38,427 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:38,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 20:23:38,428 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 20:23:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:23:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash -577059934, now seen corresponding path program 1 times [2021-11-06 20:23:38,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:23:38,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032958734] [2021-11-06 20:23:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:23:38,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:23:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:23:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 20:23:38,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:23:38,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032958734] [2021-11-06 20:23:38,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032958734] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:23:38,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:23:38,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:23:38,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504729295] [2021-11-06 20:23:38,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:23:38,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:23:38,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:23:38,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:23:38,638 INFO L87 Difference]: Start difference. First operand 83120 states and 99669 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 20:23:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:23:42,979 INFO L93 Difference]: Finished difference Result 171898 states and 206539 transitions. [2021-11-06 20:23:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:23:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 223 [2021-11-06 20:23:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:23:43,151 INFO L225 Difference]: With dead ends: 171898 [2021-11-06 20:23:43,152 INFO L226 Difference]: Without dead ends: 88878 [2021-11-06 20:23:43,251 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 20:23:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88878 states. [2021-11-06 20:23:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88878 to 88822. [2021-11-06 20:23:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88822 states, 88820 states have (on average 1.2019139833370862) internal successors, (106754), 88821 states have internal predecessors, (106754), 0 states have call successors, (0), 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 20:23:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88822 states to 88822 states and 106754 transitions. [2021-11-06 20:23:45,150 INFO L78 Accepts]: Start accepts. Automaton has 88822 states and 106754 transitions. Word has length 223 [2021-11-06 20:23:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:23:45,150 INFO L470 AbstractCegarLoop]: Abstraction has 88822 states and 106754 transitions. [2021-11-06 20:23:45,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 20:23:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 88822 states and 106754 transitions. [2021-11-06 20:23:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-06 20:23:45,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:23:45,218 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:45,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 20:23:45,218 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 20:23:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:23:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1881725157, now seen corresponding path program 1 times [2021-11-06 20:23:45,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:23:45,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544789692] [2021-11-06 20:23:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:23:45,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:23:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:23:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 20:23:45,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:23:45,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544789692] [2021-11-06 20:23:45,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544789692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:23:45,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:23:45,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:23:45,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413190063] [2021-11-06 20:23:45,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:23:45,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:23:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:23:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:23:45,414 INFO L87 Difference]: Start difference. First operand 88822 states and 106754 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 20:23:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:23:50,085 INFO L93 Difference]: Finished difference Result 203532 states and 244709 transitions. [2021-11-06 20:23:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:23:50,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 229 [2021-11-06 20:23:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:23:50,451 INFO L225 Difference]: With dead ends: 203532 [2021-11-06 20:23:50,451 INFO L226 Difference]: Without dead ends: 114374 [2021-11-06 20:23:50,561 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 20:23:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114374 states. [2021-11-06 20:23:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114374 to 113904. [2021-11-06 20:23:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113904 states, 113902 states have (on average 1.2011378202314271) internal successors, (136812), 113903 states have internal predecessors, (136812), 0 states have call successors, (0), 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 20:23:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113904 states to 113904 states and 136812 transitions. [2021-11-06 20:23:52,920 INFO L78 Accepts]: Start accepts. Automaton has 113904 states and 136812 transitions. Word has length 229 [2021-11-06 20:23:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:23:52,920 INFO L470 AbstractCegarLoop]: Abstraction has 113904 states and 136812 transitions. [2021-11-06 20:23:52,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 20:23:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 113904 states and 136812 transitions. [2021-11-06 20:23:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-06 20:23:53,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:23:53,201 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:53,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 20:23:53,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-06 20:23:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:23:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2064617698, now seen corresponding path program 1 times [2021-11-06 20:23:53,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:23:53,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913258464] [2021-11-06 20:23:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:23:53,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:23:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:23:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 20:23:53,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:23:53,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913258464] [2021-11-06 20:23:53,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913258464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:23:53,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:23:53,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:23:53,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335722508] [2021-11-06 20:23:53,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:23:53,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:23:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:23:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:23:53,392 INFO L87 Difference]: Start difference. First operand 113904 states and 136812 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 20:23:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:23:58,812 INFO L93 Difference]: Finished difference Result 282792 states and 339752 transitions. [2021-11-06 20:23:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:23:58,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 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 232 [2021-11-06 20:23:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:23:59,160 INFO L225 Difference]: With dead ends: 282792 [2021-11-06 20:23:59,160 INFO L226 Difference]: Without dead ends: 168988 [2021-11-06 20:23:59,305 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 20:23:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168988 states.