./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 6b3de547936c1646f60b80d97a1625774e2d4a48db257d02bb1b2f3a0d43e91e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 14:43:08,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 14:43:08,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 14:43:08,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 14:43:08,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 14:43:08,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 14:43:08,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 14:43:08,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 14:43:08,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 14:43:08,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 14:43:08,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 14:43:08,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 14:43:08,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 14:43:08,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 14:43:08,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 14:43:08,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 14:43:08,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 14:43:08,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 14:43:08,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 14:43:08,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 14:43:08,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 14:43:08,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 14:43:08,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 14:43:08,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 14:43:08,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 14:43:08,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 14:43:08,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 14:43:08,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 14:43:08,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 14:43:08,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 14:43:08,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 14:43:08,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 14:43:08,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 14:43:08,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 14:43:08,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 14:43:08,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 14:43:08,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 14:43:08,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 14:43:08,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 14:43:08,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 14:43:08,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 14:43:08,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 14:43:08,807 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 14:43:08,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 14:43:08,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 14:43:08,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 14:43:08,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 14:43:08,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 14:43:08,810 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 14:43:08,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 14:43:08,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 14:43:08,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 14:43:08,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 14:43:08,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 14:43:08,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 14:43:08,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 14:43:08,812 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 14:43:08,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 14:43:08,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 14:43:08,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 14:43:08,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 14:43:08,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:43:08,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 14:43:08,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 14:43:08,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 14:43:08,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 14:43:08,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 14:43:08,813 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 14:43:08,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 14:43:08,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 14:43:08,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 14:43:08,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b3de547936c1646f60b80d97a1625774e2d4a48db257d02bb1b2f3a0d43e91e [2021-11-06 14:43:09,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 14:43:09,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 14:43:09,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 14:43:09,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 14:43:09,045 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 14:43:09,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-11-06 14:43:09,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9817841da/d1d5ded7d87b45648313b65fd5f25e50/FLAG2faf11d2a [2021-11-06 14:43:09,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 14:43:09,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-11-06 14:43:09,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9817841da/d1d5ded7d87b45648313b65fd5f25e50/FLAG2faf11d2a [2021-11-06 14:43:10,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9817841da/d1d5ded7d87b45648313b65fd5f25e50 [2021-11-06 14:43:10,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 14:43:10,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 14:43:10,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 14:43:10,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 14:43:10,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 14:43:10,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:43:10" (1/1) ... [2021-11-06 14:43:10,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7da0e338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:10, skipping insertion in model container [2021-11-06 14:43:10,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 02:43:10" (1/1) ... [2021-11-06 14:43:10,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 14:43:10,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 14:43:10,783 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2021-11-06 14:43:11,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:43:11,229 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 14:43:11,342 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2021-11-06 14:43:11,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 14:43:11,558 INFO L208 MainTranslator]: Completed translation [2021-11-06 14:43:11,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11 WrapperNode [2021-11-06 14:43:11,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 14:43:11,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 14:43:11,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 14:43:11,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 14:43:11,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:11,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:12,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 14:43:12,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 14:43:12,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 14:43:12,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 14:43:12,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:12,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:12,320 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:12,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:12,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:12,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:12,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:13,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 14:43:13,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 14:43:13,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 14:43:13,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 14:43:13,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (1/1) ... [2021-11-06 14:43:13,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 14:43:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 14:43:13,176 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 14:43:13,177 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 14:43:13,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 14:43:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 14:43:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 14:43:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 14:43:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 14:43:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 14:43:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 14:43:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 14:43:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 14:43:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 14:43:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 14:43:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 14:43:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 14:43:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 14:43:13,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 14:43:22,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 14:43:22,642 INFO L299 CfgBuilder]: Removed 3847 assume(true) statements. [2021-11-06 14:43:22,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:43:22 BoogieIcfgContainer [2021-11-06 14:43:22,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 14:43:22,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 14:43:22,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 14:43:22,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 14:43:22,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 02:43:10" (1/3) ... [2021-11-06 14:43:22,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bcf2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:43:22, skipping insertion in model container [2021-11-06 14:43:22,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 02:43:11" (2/3) ... [2021-11-06 14:43:22,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22bcf2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 02:43:22, skipping insertion in model container [2021-11-06 14:43:22,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 02:43:22" (3/3) ... [2021-11-06 14:43:22,656 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-11-06 14:43:22,664 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 14:43:22,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-06 14:43:22,714 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 14:43:22,718 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 14:43:22,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-06 14:43:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 4667 states, 4665 states have (on average 1.4655948553054663) internal successors, (6837), 4666 states have internal predecessors, (6837), 0 states have call successors, (0), 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 14:43:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-06 14:43:22,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:22,785 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] [2021-11-06 14:43:22,785 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1642635718, now seen corresponding path program 1 times [2021-11-06 14:43:22,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:22,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901433364] [2021-11-06 14:43:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:22,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:23,059 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 14:43:23,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:23,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901433364] [2021-11-06 14:43:23,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901433364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:23,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:23,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:43:23,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023991916] [2021-11-06 14:43:23,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:43:23,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:43:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:43:23,082 INFO L87 Difference]: Start difference. First operand has 4667 states, 4665 states have (on average 1.4655948553054663) internal successors, (6837), 4666 states have internal predecessors, (6837), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 14:43:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:23,620 INFO L93 Difference]: Finished difference Result 13949 states and 20444 transitions. [2021-11-06 14:43:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:43:23,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-11-06 14:43:23,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:23,666 INFO L225 Difference]: With dead ends: 13949 [2021-11-06 14:43:23,666 INFO L226 Difference]: Without dead ends: 9275 [2021-11-06 14:43:23,682 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 14:43:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9275 states. [2021-11-06 14:43:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9275 to 9275. [2021-11-06 14:43:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9275 states, 9274 states have (on average 1.4067284882467113) internal successors, (13046), 9274 states have internal predecessors, (13046), 0 states have call successors, (0), 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 14:43:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9275 states to 9275 states and 13046 transitions. [2021-11-06 14:43:23,906 INFO L78 Accepts]: Start accepts. Automaton has 9275 states and 13046 transitions. Word has length 22 [2021-11-06 14:43:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:23,906 INFO L470 AbstractCegarLoop]: Abstraction has 9275 states and 13046 transitions. [2021-11-06 14:43:23,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 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 14:43:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9275 states and 13046 transitions. [2021-11-06 14:43:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-06 14:43:23,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:23,909 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] [2021-11-06 14:43:23,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 14:43:23,909 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash -899430506, now seen corresponding path program 1 times [2021-11-06 14:43:23,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:23,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019779417] [2021-11-06 14:43:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:23,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:23,991 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 14:43:23,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:23,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019779417] [2021-11-06 14:43:23,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019779417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:23,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:23,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:43:23,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239889586] [2021-11-06 14:43:23,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:43:23,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:43:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:43:23,997 INFO L87 Difference]: Start difference. First operand 9275 states and 13046 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 14:43:24,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:24,281 INFO L93 Difference]: Finished difference Result 18526 states and 26063 transitions. [2021-11-06 14:43:24,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:43:24,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-06 14:43:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:24,312 INFO L225 Difference]: With dead ends: 18526 [2021-11-06 14:43:24,312 INFO L226 Difference]: Without dead ends: 9274 [2021-11-06 14:43:24,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:43:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9274 states. [2021-11-06 14:43:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9274 to 9274. [2021-11-06 14:43:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 1.4064488299363744) internal successors, (13042), 9273 states have internal predecessors, (13042), 0 states have call successors, (0), 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 14:43:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 13042 transitions. [2021-11-06 14:43:24,537 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 13042 transitions. Word has length 26 [2021-11-06 14:43:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:24,538 INFO L470 AbstractCegarLoop]: Abstraction has 9274 states and 13042 transitions. [2021-11-06 14:43:24,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 14:43:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 13042 transitions. [2021-11-06 14:43:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-06 14:43:24,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:24,545 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] [2021-11-06 14:43:24,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 14:43:24,546 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1619061827, now seen corresponding path program 1 times [2021-11-06 14:43:24,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:24,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78321516] [2021-11-06 14:43:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:24,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:43:24,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:24,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78321516] [2021-11-06 14:43:24,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78321516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:24,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:24,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 14:43:24,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42455950] [2021-11-06 14:43:24,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 14:43:24,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 14:43:24,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:43:24,691 INFO L87 Difference]: Start difference. First operand 9274 states and 13042 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:25,495 INFO L93 Difference]: Finished difference Result 27774 states and 39071 transitions. [2021-11-06 14:43:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:43:25,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-06 14:43:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:25,555 INFO L225 Difference]: With dead ends: 27774 [2021-11-06 14:43:25,556 INFO L226 Difference]: Without dead ends: 18519 [2021-11-06 14:43:25,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 14:43:25,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18519 states. [2021-11-06 14:43:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18519 to 18279. [2021-11-06 14:43:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18279 states, 18278 states have (on average 1.4081956450377504) internal successors, (25739), 18278 states have internal predecessors, (25739), 0 states have call successors, (0), 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 14:43:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18279 states to 18279 states and 25739 transitions. [2021-11-06 14:43:25,955 INFO L78 Accepts]: Start accepts. Automaton has 18279 states and 25739 transitions. Word has length 38 [2021-11-06 14:43:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:25,956 INFO L470 AbstractCegarLoop]: Abstraction has 18279 states and 25739 transitions. [2021-11-06 14:43:25,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:25,956 INFO L276 IsEmpty]: Start isEmpty. Operand 18279 states and 25739 transitions. [2021-11-06 14:43:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-06 14:43:25,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:25,965 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:25,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 14:43:25,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash -770183526, now seen corresponding path program 1 times [2021-11-06 14:43:25,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:25,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668639415] [2021-11-06 14:43:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:25,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-06 14:43:26,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:26,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668639415] [2021-11-06 14:43:26,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668639415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:26,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:26,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:43:26,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762769818] [2021-11-06 14:43:26,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:43:26,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:43:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:43:26,050 INFO L87 Difference]: Start difference. First operand 18279 states and 25739 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 14:43:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:26,687 INFO L93 Difference]: Finished difference Result 44717 states and 62949 transitions. [2021-11-06 14:43:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:43:26,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 59 [2021-11-06 14:43:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:26,753 INFO L225 Difference]: With dead ends: 44717 [2021-11-06 14:43:26,753 INFO L226 Difference]: Without dead ends: 26461 [2021-11-06 14:43:26,784 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 14:43:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26461 states. [2021-11-06 14:43:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26461 to 26437. [2021-11-06 14:43:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26437 states, 26436 states have (on average 1.4074746557724316) internal successors, (37208), 26436 states have internal predecessors, (37208), 0 states have call successors, (0), 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 14:43:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26437 states to 26437 states and 37208 transitions. [2021-11-06 14:43:27,396 INFO L78 Accepts]: Start accepts. Automaton has 26437 states and 37208 transitions. Word has length 59 [2021-11-06 14:43:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:27,397 INFO L470 AbstractCegarLoop]: Abstraction has 26437 states and 37208 transitions. [2021-11-06 14:43:27,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 14:43:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 26437 states and 37208 transitions. [2021-11-06 14:43:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-06 14:43:27,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:27,407 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:27,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 14:43:27,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1015760832, now seen corresponding path program 2 times [2021-11-06 14:43:27,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:27,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807650362] [2021-11-06 14:43:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:27,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 14:43:27,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:27,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807650362] [2021-11-06 14:43:27,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807650362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:27,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:27,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:43:27,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150698836] [2021-11-06 14:43:27,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:43:27,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:27,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:43:27,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:43:27,487 INFO L87 Difference]: Start difference. First operand 26437 states and 37208 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 14:43:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:28,274 INFO L93 Difference]: Finished difference Result 52913 states and 74493 transitions. [2021-11-06 14:43:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:43:28,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-06 14:43:28,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:28,338 INFO L225 Difference]: With dead ends: 52913 [2021-11-06 14:43:28,338 INFO L226 Difference]: Without dead ends: 35133 [2021-11-06 14:43:28,371 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 14:43:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35133 states. [2021-11-06 14:43:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35133 to 35109. [2021-11-06 14:43:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35109 states, 35108 states have (on average 1.4074854733963769) internal successors, (49414), 35108 states have internal predecessors, (49414), 0 states have call successors, (0), 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 14:43:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35109 states to 35109 states and 49414 transitions. [2021-11-06 14:43:29,030 INFO L78 Accepts]: Start accepts. Automaton has 35109 states and 49414 transitions. Word has length 59 [2021-11-06 14:43:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:29,030 INFO L470 AbstractCegarLoop]: Abstraction has 35109 states and 49414 transitions. [2021-11-06 14:43:29,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 14:43:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 35109 states and 49414 transitions. [2021-11-06 14:43:29,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-06 14:43:29,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:29,044 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-06 14:43:29,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 14:43:29,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:29,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:29,046 INFO L85 PathProgramCache]: Analyzing trace with hash -591221986, now seen corresponding path program 1 times [2021-11-06 14:43:29,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:29,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419000991] [2021-11-06 14:43:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:29,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 14:43:29,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:29,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419000991] [2021-11-06 14:43:29,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419000991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:29,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:29,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:43:29,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544370022] [2021-11-06 14:43:29,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:43:29,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:43:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:43:29,158 INFO L87 Difference]: Start difference. First operand 35109 states and 49414 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) 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 14:43:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:29,957 INFO L93 Difference]: Finished difference Result 70257 states and 98905 transitions. [2021-11-06 14:43:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:43:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) 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 73 [2021-11-06 14:43:29,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:30,026 INFO L225 Difference]: With dead ends: 70257 [2021-11-06 14:43:30,026 INFO L226 Difference]: Without dead ends: 43805 [2021-11-06 14:43:30,059 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 14:43:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43805 states. [2021-11-06 14:43:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43805 to 43781. [2021-11-06 14:43:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43781 states, 43780 states have (on average 1.4074920054819553) internal successors, (61620), 43780 states have internal predecessors, (61620), 0 states have call successors, (0), 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 14:43:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43781 states to 43781 states and 61620 transitions. [2021-11-06 14:43:30,706 INFO L78 Accepts]: Start accepts. Automaton has 43781 states and 61620 transitions. Word has length 73 [2021-11-06 14:43:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:30,707 INFO L470 AbstractCegarLoop]: Abstraction has 43781 states and 61620 transitions. [2021-11-06 14:43:30,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) 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 14:43:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 43781 states and 61620 transitions. [2021-11-06 14:43:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 14:43:30,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:30,725 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:30,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 14:43:30,726 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash 638916036, now seen corresponding path program 1 times [2021-11-06 14:43:30,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:30,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918231146] [2021-11-06 14:43:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:30,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-06 14:43:30,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:30,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918231146] [2021-11-06 14:43:30,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918231146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:30,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:30,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:43:30,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607082962] [2021-11-06 14:43:30,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:43:30,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:43:30,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:43:30,802 INFO L87 Difference]: Start difference. First operand 43781 states and 61620 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2021-11-06 14:43:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:31,677 INFO L93 Difference]: Finished difference Result 96467 states and 135773 transitions. [2021-11-06 14:43:31,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:43:31,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) Word has length 86 [2021-11-06 14:43:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:31,785 INFO L225 Difference]: With dead ends: 96467 [2021-11-06 14:43:31,786 INFO L226 Difference]: Without dead ends: 61343 [2021-11-06 14:43:31,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:43:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61343 states. [2021-11-06 14:43:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61343 to 43785. [2021-11-06 14:43:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43785 states, 43784 states have (on average 1.4074547780010962) internal successors, (61624), 43784 states have internal predecessors, (61624), 0 states have call successors, (0), 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 14:43:33,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43785 states to 43785 states and 61624 transitions. [2021-11-06 14:43:33,028 INFO L78 Accepts]: Start accepts. Automaton has 43785 states and 61624 transitions. Word has length 86 [2021-11-06 14:43:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:33,029 INFO L470 AbstractCegarLoop]: Abstraction has 43785 states and 61624 transitions. [2021-11-06 14:43:33,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2021-11-06 14:43:33,029 INFO L276 IsEmpty]: Start isEmpty. Operand 43785 states and 61624 transitions. [2021-11-06 14:43:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-06 14:43:33,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:33,061 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:33,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 14:43:33,062 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash -280928408, now seen corresponding path program 1 times [2021-11-06 14:43:33,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:33,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837723025] [2021-11-06 14:43:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:33,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-06 14:43:33,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:33,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837723025] [2021-11-06 14:43:33,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837723025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:33,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:33,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:43:33,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60473708] [2021-11-06 14:43:33,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:43:33,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:43:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:43:33,130 INFO L87 Difference]: Start difference. First operand 43785 states and 61624 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 14:43:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:34,887 INFO L93 Difference]: Finished difference Result 107888 states and 151875 transitions. [2021-11-06 14:43:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:43:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 88 [2021-11-06 14:43:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:35,069 INFO L225 Difference]: With dead ends: 107888 [2021-11-06 14:43:35,070 INFO L226 Difference]: Without dead ends: 85728 [2021-11-06 14:43:35,128 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 14:43:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85728 states. [2021-11-06 14:43:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85728 to 44061. [2021-11-06 14:43:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44061 states, 44060 states have (on average 1.4049024058102588) internal successors, (61900), 44060 states have internal predecessors, (61900), 0 states have call successors, (0), 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 14:43:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44061 states to 44061 states and 61900 transitions. [2021-11-06 14:43:36,506 INFO L78 Accepts]: Start accepts. Automaton has 44061 states and 61900 transitions. Word has length 88 [2021-11-06 14:43:36,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:36,507 INFO L470 AbstractCegarLoop]: Abstraction has 44061 states and 61900 transitions. [2021-11-06 14:43:36,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 14:43:36,507 INFO L276 IsEmpty]: Start isEmpty. Operand 44061 states and 61900 transitions. [2021-11-06 14:43:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 14:43:36,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:36,525 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 14:43:36,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 14:43:36,526 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:36,526 INFO L85 PathProgramCache]: Analyzing trace with hash -284281593, now seen corresponding path program 1 times [2021-11-06 14:43:36,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:36,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831355146] [2021-11-06 14:43:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:36,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-06 14:43:36,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:36,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831355146] [2021-11-06 14:43:36,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831355146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:36,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:36,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:43:36,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336283456] [2021-11-06 14:43:36,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:43:36,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:36,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:43:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:43:36,652 INFO L87 Difference]: Start difference. First operand 44061 states and 61900 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 14:43:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:38,440 INFO L93 Difference]: Finished difference Result 108434 states and 152250 transitions. [2021-11-06 14:43:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 14:43:38,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 90 [2021-11-06 14:43:38,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:38,721 INFO L225 Difference]: With dead ends: 108434 [2021-11-06 14:43:38,722 INFO L226 Difference]: Without dead ends: 64396 [2021-11-06 14:43:38,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:43:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64396 states. [2021-11-06 14:43:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64396 to 43647. [2021-11-06 14:43:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43647 states, 43646 states have (on average 1.3992576639325482) internal successors, (61072), 43646 states have internal predecessors, (61072), 0 states have call successors, (0), 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 14:43:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43647 states to 43647 states and 61072 transitions. [2021-11-06 14:43:40,147 INFO L78 Accepts]: Start accepts. Automaton has 43647 states and 61072 transitions. Word has length 90 [2021-11-06 14:43:40,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:40,147 INFO L470 AbstractCegarLoop]: Abstraction has 43647 states and 61072 transitions. [2021-11-06 14:43:40,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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 14:43:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 43647 states and 61072 transitions. [2021-11-06 14:43:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 14:43:40,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:40,162 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:43:40,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 14:43:40,162 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:40,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash 298726998, now seen corresponding path program 1 times [2021-11-06 14:43:40,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:40,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737627155] [2021-11-06 14:43:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:40,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:43:40,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:40,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737627155] [2021-11-06 14:43:40,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737627155] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:40,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:40,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 14:43:40,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90293944] [2021-11-06 14:43:40,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 14:43:40,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:40,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 14:43:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 14:43:40,226 INFO L87 Difference]: Start difference. First operand 43647 states and 61072 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:42,172 INFO L93 Difference]: Finished difference Result 127145 states and 178332 transitions. [2021-11-06 14:43:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 14:43:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 14:43:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:42,343 INFO L225 Difference]: With dead ends: 127145 [2021-11-06 14:43:42,343 INFO L226 Difference]: Without dead ends: 83521 [2021-11-06 14:43:42,413 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 14:43:42,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83521 states. [2021-11-06 14:43:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83521 to 53877. [2021-11-06 14:43:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53877 states, 53876 states have (on average 1.394164377459351) internal successors, (75112), 53876 states have internal predecessors, (75112), 0 states have call successors, (0), 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 14:43:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53877 states to 53877 states and 75112 transitions. [2021-11-06 14:43:44,413 INFO L78 Accepts]: Start accepts. Automaton has 53877 states and 75112 transitions. Word has length 90 [2021-11-06 14:43:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:44,414 INFO L470 AbstractCegarLoop]: Abstraction has 53877 states and 75112 transitions. [2021-11-06 14:43:44,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 53877 states and 75112 transitions. [2021-11-06 14:43:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 14:43:44,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:44,426 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:43:44,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 14:43:44,426 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:44,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:44,427 INFO L85 PathProgramCache]: Analyzing trace with hash -545278504, now seen corresponding path program 1 times [2021-11-06 14:43:44,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:44,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962026572] [2021-11-06 14:43:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:44,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:43:44,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:44,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962026572] [2021-11-06 14:43:44,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962026572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:44,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:44,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 14:43:44,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776643643] [2021-11-06 14:43:44,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 14:43:44,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:44,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 14:43:44,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 14:43:44,498 INFO L87 Difference]: Start difference. First operand 53877 states and 75112 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 14:43:48,933 INFO L93 Difference]: Finished difference Result 240322 states and 335555 transitions. [2021-11-06 14:43:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 14:43:48,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 14:43:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 14:43:49,282 INFO L225 Difference]: With dead ends: 240322 [2021-11-06 14:43:49,283 INFO L226 Difference]: Without dead ends: 186468 [2021-11-06 14:43:49,356 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 14:43:49,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186468 states. [2021-11-06 14:43:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186468 to 54117. [2021-11-06 14:43:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54117 states, 54116 states have (on average 1.3924162909305935) internal successors, (75352), 54116 states have internal predecessors, (75352), 0 states have call successors, (0), 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 14:43:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54117 states to 54117 states and 75352 transitions. [2021-11-06 14:43:52,053 INFO L78 Accepts]: Start accepts. Automaton has 54117 states and 75352 transitions. Word has length 90 [2021-11-06 14:43:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 14:43:52,053 INFO L470 AbstractCegarLoop]: Abstraction has 54117 states and 75352 transitions. [2021-11-06 14:43:52,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 14:43:52,054 INFO L276 IsEmpty]: Start isEmpty. Operand 54117 states and 75352 transitions. [2021-11-06 14:43:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-06 14:43:52,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 14:43:52,068 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 14:43:52,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 14:43:52,068 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 14:43:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 14:43:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash 735356708, now seen corresponding path program 1 times [2021-11-06 14:43:52,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 14:43:52,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70997362] [2021-11-06 14:43:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 14:43:52,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 14:43:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 14:43:53,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 14:43:53,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 14:43:53,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70997362] [2021-11-06 14:43:53,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70997362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 14:43:53,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 14:43:53,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-06 14:43:53,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739081652] [2021-11-06 14:43:53,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 14:43:53,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 14:43:53,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 14:43:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-06 14:43:53,066 INFO L87 Difference]: Start difference. First operand 54117 states and 75352 transitions. Second operand has 10 states, 10 states have (on average 9.2) internal successors, (92), 10 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)