./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.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 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 17:43:23,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 17:43:23,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 17:43:23,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 17:43:23,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 17:43:23,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 17:43:23,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 17:43:23,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 17:43:23,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 17:43:23,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 17:43:23,509 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 17:43:23,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 17:43:23,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 17:43:23,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 17:43:23,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 17:43:23,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 17:43:23,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 17:43:23,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 17:43:23,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 17:43:23,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 17:43:23,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 17:43:23,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 17:43:23,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 17:43:23,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 17:43:23,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 17:43:23,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 17:43:23,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 17:43:23,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 17:43:23,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 17:43:23,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 17:43:23,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 17:43:23,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 17:43:23,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 17:43:23,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 17:43:23,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 17:43:23,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 17:43:23,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 17:43:23,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 17:43:23,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 17:43:23,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 17:43:23,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 17:43:23,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 17:43:23,567 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 17:43:23,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 17:43:23,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 17:43:23,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 17:43:23,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 17:43:23,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 17:43:23,569 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 17:43:23,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 17:43:23,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 17:43:23,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 17:43:23,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 17:43:23,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 17:43:23,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 17:43:23,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 17:43:23,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 17:43:23,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 17:43:23,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 17:43:23,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 17:43:23,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 17:43:23,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 17:43:23,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 17:43:23,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 17:43:23,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 17:43:23,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 17:43:23,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 17:43:23,572 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 17:43:23,572 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 17:43:23,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 17:43:23,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 17:43:23,574 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 [2021-11-06 17:43:23,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 17:43:23,769 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 17:43:23,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 17:43:23,774 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 17:43:23,775 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 17:43:23,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2021-11-06 17:43:23,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b063996/48e0377135914bb886197a67fa287198/FLAG7dfb99f88 [2021-11-06 17:43:24,468 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 17:43:24,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2021-11-06 17:43:24,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b063996/48e0377135914bb886197a67fa287198/FLAG7dfb99f88 [2021-11-06 17:43:24,558 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b063996/48e0377135914bb886197a67fa287198 [2021-11-06 17:43:24,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 17:43:24,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 17:43:24,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 17:43:24,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 17:43:24,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 17:43:24,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 05:43:24" (1/1) ... [2021-11-06 17:43:24,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bff073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:24, skipping insertion in model container [2021-11-06 17:43:24,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 05:43:24" (1/1) ... [2021-11-06 17:43:24,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 17:43:24,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 17:43:25,323 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2021-11-06 17:43:25,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 17:43:25,362 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 17:43:25,594 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2021-11-06 17:43:25,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 17:43:25,638 INFO L208 MainTranslator]: Completed translation [2021-11-06 17:43:25,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25 WrapperNode [2021-11-06 17:43:25,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 17:43:25,641 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 17:43:25,641 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 17:43:25,641 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 17:43:25,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:25,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 17:43:26,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 17:43:26,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 17:43:26,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 17:43:26,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,754 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 17:43:26,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 17:43:26,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 17:43:26,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 17:43:26,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (1/1) ... [2021-11-06 17:43:26,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 17:43:26,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:43:26,845 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 17:43:26,857 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 17:43:26,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 17:43:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-06 17:43:26,874 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-06 17:43:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-06 17:43:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 17:43:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 17:43:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 17:43:26,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 17:43:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-06 17:43:26,875 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-06 17:43:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 17:43:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure rdac_bus_detach [2021-11-06 17:43:26,875 INFO L138 BoogieDeclarations]: Found implementation of procedure rdac_bus_detach [2021-11-06 17:43:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 17:43:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 17:43:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-06 17:43:26,875 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 17:43:26,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 17:43:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 17:43:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-06 17:43:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 17:43:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 17:43:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 17:43:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 17:43:26,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 17:43:26,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 17:43:37,438 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 17:43:37,438 INFO L299 CfgBuilder]: Removed 3524 assume(true) statements. [2021-11-06 17:43:37,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 05:43:37 BoogieIcfgContainer [2021-11-06 17:43:37,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 17:43:37,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 17:43:37,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 17:43:37,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 17:43:37,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 05:43:24" (1/3) ... [2021-11-06 17:43:37,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c69b637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 05:43:37, skipping insertion in model container [2021-11-06 17:43:37,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 05:43:25" (2/3) ... [2021-11-06 17:43:37,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c69b637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 05:43:37, skipping insertion in model container [2021-11-06 17:43:37,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 05:43:37" (3/3) ... [2021-11-06 17:43:37,450 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2021-11-06 17:43:37,455 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 17:43:37,455 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-06 17:43:37,498 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 17:43:37,502 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 17:43:37,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-06 17:43:37,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 3676 states, 3662 states have (on average 1.4412889131622064) internal successors, (5278), 3666 states have internal predecessors, (5278), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-06 17:43:37,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:37,562 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:37,562 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:37,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash -792164640, now seen corresponding path program 1 times [2021-11-06 17:43:37,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:37,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687997254] [2021-11-06 17:43:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:37,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:37,894 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 17:43:37,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:37,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687997254] [2021-11-06 17:43:37,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687997254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:37,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:37,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 17:43:37,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649730259] [2021-11-06 17:43:37,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 17:43:37,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 17:43:37,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 17:43:37,918 INFO L87 Difference]: Start difference. First operand has 3676 states, 3662 states have (on average 1.4412889131622064) internal successors, (5278), 3666 states have internal predecessors, (5278), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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 17:43:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:38,051 INFO L93 Difference]: Finished difference Result 7348 states and 10581 transitions. [2021-11-06 17:43:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 17:43:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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 30 [2021-11-06 17:43:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:38,069 INFO L225 Difference]: With dead ends: 7348 [2021-11-06 17:43:38,069 INFO L226 Difference]: Without dead ends: 2283 [2021-11-06 17:43:38,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 17:43:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-11-06 17:43:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2283. [2021-11-06 17:43:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2270 states have (on average 1.411013215859031) internal successors, (3203), 2273 states have internal predecessors, (3203), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3215 transitions. [2021-11-06 17:43:38,176 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3215 transitions. Word has length 30 [2021-11-06 17:43:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:38,176 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3215 transitions. [2021-11-06 17:43:38,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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 17:43:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3215 transitions. [2021-11-06 17:43:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-06 17:43:38,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:38,178 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:38,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 17:43:38,178 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:38,179 INFO L85 PathProgramCache]: Analyzing trace with hash -557880348, now seen corresponding path program 1 times [2021-11-06 17:43:38,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:38,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94609604] [2021-11-06 17:43:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:38,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:38,297 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 17:43:38,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:38,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94609604] [2021-11-06 17:43:38,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94609604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:38,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:38,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:43:38,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086056256] [2021-11-06 17:43:38,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:43:38,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:43:38,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:43:38,300 INFO L87 Difference]: Start difference. First operand 2283 states and 3215 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 17:43:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:38,436 INFO L93 Difference]: Finished difference Result 4923 states and 6947 transitions. [2021-11-06 17:43:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:43:38,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 30 [2021-11-06 17:43:38,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:38,463 INFO L225 Difference]: With dead ends: 4923 [2021-11-06 17:43:38,463 INFO L226 Difference]: Without dead ends: 2659 [2021-11-06 17:43:38,471 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 17:43:38,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-11-06 17:43:38,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2658. [2021-11-06 17:43:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2645 states have (on average 1.4132325141776938) internal successors, (3738), 2648 states have internal predecessors, (3738), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3750 transitions. [2021-11-06 17:43:38,533 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3750 transitions. Word has length 30 [2021-11-06 17:43:38,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:38,535 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 3750 transitions. [2021-11-06 17:43:38,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 17:43:38,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3750 transitions. [2021-11-06 17:43:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-06 17:43:38,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:38,542 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-06 17:43:38,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 17:43:38,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:38,547 INFO L85 PathProgramCache]: Analyzing trace with hash 889001481, now seen corresponding path program 1 times [2021-11-06 17:43:38,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:38,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420135534] [2021-11-06 17:43:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:38,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 17:43:38,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:38,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420135534] [2021-11-06 17:43:38,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420135534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:38,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:38,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 17:43:38,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179946478] [2021-11-06 17:43:38,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:43:38,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:38,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:43:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:43:38,734 INFO L87 Difference]: Start difference. First operand 2658 states and 3750 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 17:43:38,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:38,960 INFO L93 Difference]: Finished difference Result 7904 states and 11171 transitions. [2021-11-06 17:43:38,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 17:43:38,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 50 [2021-11-06 17:43:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:38,983 INFO L225 Difference]: With dead ends: 7904 [2021-11-06 17:43:38,983 INFO L226 Difference]: Without dead ends: 5265 [2021-11-06 17:43:38,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 17:43:38,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-11-06 17:43:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 2661. [2021-11-06 17:43:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2648 states have (on average 1.4127643504531722) internal successors, (3741), 2651 states have internal predecessors, (3741), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 3753 transitions. [2021-11-06 17:43:39,070 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 3753 transitions. Word has length 50 [2021-11-06 17:43:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:39,070 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 3753 transitions. [2021-11-06 17:43:39,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 17:43:39,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 3753 transitions. [2021-11-06 17:43:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-06 17:43:39,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:39,073 INFO L513 BasicCegarLoop]: trace histogram [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 17:43:39,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 17:43:39,073 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:39,075 INFO L85 PathProgramCache]: Analyzing trace with hash 432522714, now seen corresponding path program 1 times [2021-11-06 17:43:39,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:39,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282950438] [2021-11-06 17:43:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:39,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:39,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:39,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282950438] [2021-11-06 17:43:39,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282950438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:39,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:39,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 17:43:39,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854952965] [2021-11-06 17:43:39,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:43:39,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:43:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:43:39,244 INFO L87 Difference]: Start difference. First operand 2661 states and 3753 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 17:43:39,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:39,383 INFO L93 Difference]: Finished difference Result 2714 states and 3829 transitions. [2021-11-06 17:43:39,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:43:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-06 17:43:39,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:39,393 INFO L225 Difference]: With dead ends: 2714 [2021-11-06 17:43:39,393 INFO L226 Difference]: Without dead ends: 2710 [2021-11-06 17:43:39,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:43:39,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2021-11-06 17:43:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2657. [2021-11-06 17:43:39,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2646 states have (on average 1.4123204837490553) internal successors, (3737), 2647 states have internal predecessors, (3737), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3749 transitions. [2021-11-06 17:43:39,447 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3749 transitions. Word has length 51 [2021-11-06 17:43:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:39,447 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 3749 transitions. [2021-11-06 17:43:39,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 17:43:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3749 transitions. [2021-11-06 17:43:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-06 17:43:39,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:39,452 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:39,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 17:43:39,453 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:39,453 INFO L85 PathProgramCache]: Analyzing trace with hash 850413282, now seen corresponding path program 1 times [2021-11-06 17:43:39,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:39,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523576159] [2021-11-06 17:43:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:39,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:39,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:39,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523576159] [2021-11-06 17:43:39,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523576159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:39,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:39,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 17:43:39,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254740130] [2021-11-06 17:43:39,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 17:43:39,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:39,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 17:43:39,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:43:39,576 INFO L87 Difference]: Start difference. First operand 2657 states and 3749 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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 17:43:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:40,101 INFO L93 Difference]: Finished difference Result 9910 states and 14087 transitions. [2021-11-06 17:43:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 17:43:40,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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 87 [2021-11-06 17:43:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:40,131 INFO L225 Difference]: With dead ends: 9910 [2021-11-06 17:43:40,131 INFO L226 Difference]: Without dead ends: 7272 [2021-11-06 17:43:40,141 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-06 17:43:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7272 states. [2021-11-06 17:43:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7272 to 2663. [2021-11-06 17:43:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2652 states have (on average 1.4113876319758674) internal successors, (3743), 2653 states have internal predecessors, (3743), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3755 transitions. [2021-11-06 17:43:40,240 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3755 transitions. Word has length 87 [2021-11-06 17:43:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:40,241 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3755 transitions. [2021-11-06 17:43:40,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 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 17:43:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3755 transitions. [2021-11-06 17:43:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 17:43:40,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:40,245 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:40,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 17:43:40,246 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1646447522, now seen corresponding path program 1 times [2021-11-06 17:43:40,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:40,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787840465] [2021-11-06 17:43:40,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:40,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:40,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:40,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787840465] [2021-11-06 17:43:40,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787840465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:40,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:40,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 17:43:40,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233117490] [2021-11-06 17:43:40,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 17:43:40,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:40,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 17:43:40,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:43:40,380 INFO L87 Difference]: Start difference. First operand 2663 states and 3755 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 17:43:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:40,844 INFO L93 Difference]: Finished difference Result 9929 states and 14106 transitions. [2021-11-06 17:43:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 17:43:40,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 17:43:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:40,872 INFO L225 Difference]: With dead ends: 9929 [2021-11-06 17:43:40,872 INFO L226 Difference]: Without dead ends: 7285 [2021-11-06 17:43:40,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-06 17:43:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7285 states. [2021-11-06 17:43:40,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7285 to 2664. [2021-11-06 17:43:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2653 states have (on average 1.4112325669053902) internal successors, (3744), 2654 states have internal predecessors, (3744), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3756 transitions. [2021-11-06 17:43:40,983 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3756 transitions. Word has length 92 [2021-11-06 17:43:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:40,983 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 3756 transitions. [2021-11-06 17:43:40,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 17:43:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3756 transitions. [2021-11-06 17:43:40,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 17:43:40,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:40,987 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:40,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 17:43:40,987 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1708487136, now seen corresponding path program 1 times [2021-11-06 17:43:40,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:40,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676906694] [2021-11-06 17:43:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:40,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:41,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:41,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676906694] [2021-11-06 17:43:41,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676906694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:41,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:41,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 17:43:41,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693421510] [2021-11-06 17:43:41,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:43:41,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:43:41,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:43:41,102 INFO L87 Difference]: Start difference. First operand 2664 states and 3756 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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 17:43:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:41,411 INFO L93 Difference]: Finished difference Result 8239 states and 11667 transitions. [2021-11-06 17:43:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 17:43:41,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-06 17:43:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:41,429 INFO L225 Difference]: With dead ends: 8239 [2021-11-06 17:43:41,430 INFO L226 Difference]: Without dead ends: 5594 [2021-11-06 17:43:41,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-06 17:43:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2021-11-06 17:43:41,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 2667. [2021-11-06 17:43:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2656 states have (on average 1.4107680722891567) internal successors, (3747), 2657 states have internal predecessors, (3747), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3759 transitions. [2021-11-06 17:43:41,546 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3759 transitions. Word has length 92 [2021-11-06 17:43:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:41,546 INFO L470 AbstractCegarLoop]: Abstraction has 2667 states and 3759 transitions. [2021-11-06 17:43:41,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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 17:43:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3759 transitions. [2021-11-06 17:43:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-06 17:43:41,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:41,556 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:41,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 17:43:41,556 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1503123760, now seen corresponding path program 1 times [2021-11-06 17:43:41,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:41,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002051002] [2021-11-06 17:43:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:41,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:41,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:41,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002051002] [2021-11-06 17:43:41,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002051002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:41,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:41,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 17:43:41,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581252217] [2021-11-06 17:43:41,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:43:41,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:41,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:43:41,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:43:41,797 INFO L87 Difference]: Start difference. First operand 2667 states and 3759 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 17:43:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:42,512 INFO L93 Difference]: Finished difference Result 11619 states and 16612 transitions. [2021-11-06 17:43:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 17:43:42,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 97 [2021-11-06 17:43:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:42,542 INFO L225 Difference]: With dead ends: 11619 [2021-11-06 17:43:42,543 INFO L226 Difference]: Without dead ends: 8971 [2021-11-06 17:43:42,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-06 17:43:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2021-11-06 17:43:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 2670. [2021-11-06 17:43:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2670 states, 2659 states have (on average 1.4103046257991727) internal successors, (3750), 2660 states have internal predecessors, (3750), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2670 states to 2670 states and 3762 transitions. [2021-11-06 17:43:42,693 INFO L78 Accepts]: Start accepts. Automaton has 2670 states and 3762 transitions. Word has length 97 [2021-11-06 17:43:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:42,694 INFO L470 AbstractCegarLoop]: Abstraction has 2670 states and 3762 transitions. [2021-11-06 17:43:42,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 17:43:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2670 states and 3762 transitions. [2021-11-06 17:43:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-06 17:43:42,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:42,706 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:42,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 17:43:42,706 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:42,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash 76208488, now seen corresponding path program 1 times [2021-11-06 17:43:42,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:42,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514147175] [2021-11-06 17:43:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:42,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:42,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:42,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514147175] [2021-11-06 17:43:42,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514147175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:42,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:42,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 17:43:42,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354423155] [2021-11-06 17:43:42,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:43:42,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:43:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 17:43:42,880 INFO L87 Difference]: Start difference. First operand 2670 states and 3762 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 17:43:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:43,622 INFO L93 Difference]: Finished difference Result 7694 states and 10954 transitions. [2021-11-06 17:43:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:43:43,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-06 17:43:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:43,638 INFO L225 Difference]: With dead ends: 7694 [2021-11-06 17:43:43,638 INFO L226 Difference]: Without dead ends: 5043 [2021-11-06 17:43:43,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 17:43:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-11-06 17:43:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 2680. [2021-11-06 17:43:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2669 states have (on average 1.408767328587486) internal successors, (3760), 2670 states have internal predecessors, (3760), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3772 transitions. [2021-11-06 17:43:43,750 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3772 transitions. Word has length 103 [2021-11-06 17:43:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:43,750 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 3772 transitions. [2021-11-06 17:43:43,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 17:43:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3772 transitions. [2021-11-06 17:43:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-06 17:43:43,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:43,756 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:43,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 17:43:43,756 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1194987352, now seen corresponding path program 1 times [2021-11-06 17:43:43,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:43,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107228353] [2021-11-06 17:43:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:43,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:43,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:43,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107228353] [2021-11-06 17:43:43,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107228353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:43,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:43,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:43:43,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824057927] [2021-11-06 17:43:43,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:43:43,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:43,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:43:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:43:43,913 INFO L87 Difference]: Start difference. First operand 2680 states and 3772 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 17:43:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:44,069 INFO L93 Difference]: Finished difference Result 5653 states and 7964 transitions. [2021-11-06 17:43:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:43:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-06 17:43:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:44,078 INFO L225 Difference]: With dead ends: 5653 [2021-11-06 17:43:44,079 INFO L226 Difference]: Without dead ends: 2992 [2021-11-06 17:43:44,084 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 17:43:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-11-06 17:43:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2680. [2021-11-06 17:43:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2680 states, 2669 states have (on average 1.4080179842637692) internal successors, (3758), 2670 states have internal predecessors, (3758), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:44,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2680 states to 2680 states and 3770 transitions. [2021-11-06 17:43:44,262 INFO L78 Accepts]: Start accepts. Automaton has 2680 states and 3770 transitions. Word has length 107 [2021-11-06 17:43:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:44,262 INFO L470 AbstractCegarLoop]: Abstraction has 2680 states and 3770 transitions. [2021-11-06 17:43:44,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 17:43:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2680 states and 3770 transitions. [2021-11-06 17:43:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-06 17:43:44,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:44,268 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:44,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 17:43:44,269 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:44,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1165161620, now seen corresponding path program 1 times [2021-11-06 17:43:44,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:44,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89260244] [2021-11-06 17:43:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:44,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:44,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:44,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89260244] [2021-11-06 17:43:44,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89260244] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:44,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:44,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 17:43:44,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467365214] [2021-11-06 17:43:44,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 17:43:44,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:44,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 17:43:44,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:43:44,452 INFO L87 Difference]: Start difference. First operand 2680 states and 3770 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:46,025 INFO L93 Difference]: Finished difference Result 11289 states and 16092 transitions. [2021-11-06 17:43:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-06 17:43:46,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-06 17:43:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:46,053 INFO L225 Difference]: With dead ends: 11289 [2021-11-06 17:43:46,053 INFO L226 Difference]: Without dead ends: 8628 [2021-11-06 17:43:46,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-06 17:43:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8628 states. [2021-11-06 17:43:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8628 to 2725. [2021-11-06 17:43:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2714 states have (on average 1.4060427413411938) internal successors, (3816), 2715 states have internal predecessors, (3816), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 3828 transitions. [2021-11-06 17:43:46,212 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 3828 transitions. Word has length 109 [2021-11-06 17:43:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:46,213 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 3828 transitions. [2021-11-06 17:43:46,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 3828 transitions. [2021-11-06 17:43:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-06 17:43:46,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:46,220 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:46,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 17:43:46,220 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash -103991380, now seen corresponding path program 1 times [2021-11-06 17:43:46,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:46,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448298756] [2021-11-06 17:43:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:46,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:46,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:46,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448298756] [2021-11-06 17:43:46,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448298756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:46,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:46,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:43:46,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591969897] [2021-11-06 17:43:46,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:43:46,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:46,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:43:46,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:43:46,367 INFO L87 Difference]: Start difference. First operand 2725 states and 3828 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:46,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:46,627 INFO L93 Difference]: Finished difference Result 5737 states and 8069 transitions. [2021-11-06 17:43:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:43:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-06 17:43:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:46,636 INFO L225 Difference]: With dead ends: 5737 [2021-11-06 17:43:46,636 INFO L226 Difference]: Without dead ends: 3031 [2021-11-06 17:43:46,643 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 17:43:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-11-06 17:43:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 2725. [2021-11-06 17:43:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2714 states have (on average 1.4053058216654384) internal successors, (3814), 2715 states have internal predecessors, (3814), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 3826 transitions. [2021-11-06 17:43:46,781 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 3826 transitions. Word has length 121 [2021-11-06 17:43:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:46,782 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 3826 transitions. [2021-11-06 17:43:46,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 3826 transitions. [2021-11-06 17:43:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-06 17:43:46,788 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:46,788 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:46,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 17:43:46,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1010335272, now seen corresponding path program 1 times [2021-11-06 17:43:46,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:46,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580405235] [2021-11-06 17:43:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:46,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:47,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:47,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580405235] [2021-11-06 17:43:47,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580405235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:47,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:47,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:43:47,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681234324] [2021-11-06 17:43:47,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:43:47,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:47,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:43:47,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:43:47,656 INFO L87 Difference]: Start difference. First operand 2725 states and 3826 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:48,232 INFO L93 Difference]: Finished difference Result 5435 states and 7637 transitions. [2021-11-06 17:43:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:43:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-06 17:43:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:48,240 INFO L225 Difference]: With dead ends: 5435 [2021-11-06 17:43:48,240 INFO L226 Difference]: Without dead ends: 2726 [2021-11-06 17:43:48,246 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 17:43:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-11-06 17:43:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2726. [2021-11-06 17:43:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2726 states, 2715 states have (on average 1.405156537753223) internal successors, (3815), 2716 states have internal predecessors, (3815), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 3827 transitions. [2021-11-06 17:43:48,384 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 3827 transitions. Word has length 123 [2021-11-06 17:43:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:48,384 INFO L470 AbstractCegarLoop]: Abstraction has 2726 states and 3827 transitions. [2021-11-06 17:43:48,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 3827 transitions. [2021-11-06 17:43:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-06 17:43:48,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:48,392 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:48,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 17:43:48,392 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:48,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2143153690, now seen corresponding path program 1 times [2021-11-06 17:43:48,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:48,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288022871] [2021-11-06 17:43:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:48,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-06 17:43:48,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:48,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288022871] [2021-11-06 17:43:48,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288022871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:43:48,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453883292] [2021-11-06 17:43:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:48,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:43:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:43:48,806 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:43:48,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 17:43:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 17:43:49,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:43:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 17:43:49,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453883292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:49,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:43:49,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 17:43:49,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850393407] [2021-11-06 17:43:49,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:43:49,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:43:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:43:49,852 INFO L87 Difference]: Start difference. First operand 2726 states and 3827 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 17:43:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:50,473 INFO L93 Difference]: Finished difference Result 10074 states and 14271 transitions. [2021-11-06 17:43:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 17:43:50,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-06 17:43:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:50,494 INFO L225 Difference]: With dead ends: 10074 [2021-11-06 17:43:50,494 INFO L226 Difference]: Without dead ends: 7368 [2021-11-06 17:43:50,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-06 17:43:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7368 states. [2021-11-06 17:43:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7368 to 2726. [2021-11-06 17:43:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2726 states, 2715 states have (on average 1.405156537753223) internal successors, (3815), 2716 states have internal predecessors, (3815), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2726 states to 2726 states and 3827 transitions. [2021-11-06 17:43:50,649 INFO L78 Accepts]: Start accepts. Automaton has 2726 states and 3827 transitions. Word has length 124 [2021-11-06 17:43:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:50,649 INFO L470 AbstractCegarLoop]: Abstraction has 2726 states and 3827 transitions. [2021-11-06 17:43:50,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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 17:43:50,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2726 states and 3827 transitions. [2021-11-06 17:43:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-06 17:43:50,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:50,656 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:50,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-06 17:43:50,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-06 17:43:50,879 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:50,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1345235590, now seen corresponding path program 1 times [2021-11-06 17:43:50,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:50,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659772095] [2021-11-06 17:43:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:50,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 17:43:51,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:51,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659772095] [2021-11-06 17:43:51,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659772095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:51,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:51,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:43:51,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6847163] [2021-11-06 17:43:51,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:43:51,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:43:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:43:51,027 INFO L87 Difference]: Start difference. First operand 2726 states and 3827 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 17:43:51,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:51,144 INFO L93 Difference]: Finished difference Result 5433 states and 7635 transitions. [2021-11-06 17:43:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:43:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 137 [2021-11-06 17:43:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:51,151 INFO L225 Difference]: With dead ends: 5433 [2021-11-06 17:43:51,151 INFO L226 Difference]: Without dead ends: 2727 [2021-11-06 17:43:51,159 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 17:43:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-11-06 17:43:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2727. [2021-11-06 17:43:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 2716 states have (on average 1.4050073637702503) internal successors, (3816), 2717 states have internal predecessors, (3816), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:51,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 3828 transitions. [2021-11-06 17:43:51,277 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 3828 transitions. Word has length 137 [2021-11-06 17:43:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:51,278 INFO L470 AbstractCegarLoop]: Abstraction has 2727 states and 3828 transitions. [2021-11-06 17:43:51,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 17:43:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 3828 transitions. [2021-11-06 17:43:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-06 17:43:51,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:51,283 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:51,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 17:43:51,283 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash 900343864, now seen corresponding path program 1 times [2021-11-06 17:43:51,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:51,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837825820] [2021-11-06 17:43:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:51,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 17:43:51,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:51,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837825820] [2021-11-06 17:43:51,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837825820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:51,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 17:43:51,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 17:43:51,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684578438] [2021-11-06 17:43:51,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:43:51,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:43:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 17:43:51,388 INFO L87 Difference]: Start difference. First operand 2727 states and 3828 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 17:43:51,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:51,510 INFO L93 Difference]: Finished difference Result 5436 states and 7638 transitions. [2021-11-06 17:43:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:43:51,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 137 [2021-11-06 17:43:51,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:51,517 INFO L225 Difference]: With dead ends: 5436 [2021-11-06 17:43:51,517 INFO L226 Difference]: Without dead ends: 2729 [2021-11-06 17:43:51,522 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 17:43:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-11-06 17:43:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2728. [2021-11-06 17:43:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2717 states have (on average 1.4048582995951417) internal successors, (3817), 2718 states have internal predecessors, (3817), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 3829 transitions. [2021-11-06 17:43:51,730 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 3829 transitions. Word has length 137 [2021-11-06 17:43:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:51,730 INFO L470 AbstractCegarLoop]: Abstraction has 2728 states and 3829 transitions. [2021-11-06 17:43:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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 17:43:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 3829 transitions. [2021-11-06 17:43:51,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-06 17:43:51,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:51,736 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 17:43:51,736 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 86919636, now seen corresponding path program 1 times [2021-11-06 17:43:51,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:51,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509087318] [2021-11-06 17:43:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:51,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 17:43:51,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:51,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509087318] [2021-11-06 17:43:51,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509087318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:43:51,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024810522] [2021-11-06 17:43:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:51,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:43:51,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:43:51,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:43:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 17:43:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:52,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 2706 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 17:43:52,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:43:52,872 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 17:43:52,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024810522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:52,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:43:52,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-06 17:43:52,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283155389] [2021-11-06 17:43:52,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:43:52,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:43:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:43:52,874 INFO L87 Difference]: Start difference. First operand 2728 states and 3829 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:53,065 INFO L93 Difference]: Finished difference Result 5446 states and 7652 transitions. [2021-11-06 17:43:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:43:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-06 17:43:53,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:53,071 INFO L225 Difference]: With dead ends: 5446 [2021-11-06 17:43:53,072 INFO L226 Difference]: Without dead ends: 2738 [2021-11-06 17:43:53,076 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:43:53,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2021-11-06 17:43:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2730. [2021-11-06 17:43:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2719 states have (on average 1.4045605001838912) internal successors, (3819), 2720 states have internal predecessors, (3819), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 3831 transitions. [2021-11-06 17:43:53,193 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 3831 transitions. Word has length 139 [2021-11-06 17:43:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:53,193 INFO L470 AbstractCegarLoop]: Abstraction has 2730 states and 3831 transitions. [2021-11-06 17:43:53,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 3831 transitions. [2021-11-06 17:43:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-06 17:43:53,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:53,198 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:53,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 17:43:53,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-06 17:43:53,420 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:53,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:53,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1852242410, now seen corresponding path program 1 times [2021-11-06 17:43:53,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:53,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748295352] [2021-11-06 17:43:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:53,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 17:43:53,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:53,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748295352] [2021-11-06 17:43:53,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748295352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:43:53,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364100876] [2021-11-06 17:43:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:53,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:43:53,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:43:53,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:43:53,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 17:43:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:54,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 17:43:54,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:43:54,499 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 17:43:54,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364100876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:43:54,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:43:54,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-06 17:43:54,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841856353] [2021-11-06 17:43:54,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 17:43:54,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 17:43:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:43:54,503 INFO L87 Difference]: Start difference. First operand 2730 states and 3831 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:54,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:54,677 INFO L93 Difference]: Finished difference Result 5443 states and 7645 transitions. [2021-11-06 17:43:54,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:43:54,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-11-06 17:43:54,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:54,708 INFO L225 Difference]: With dead ends: 5443 [2021-11-06 17:43:54,709 INFO L226 Difference]: Without dead ends: 2733 [2021-11-06 17:43:54,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:43:54,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-11-06 17:43:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2732. [2021-11-06 17:43:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2721 states have (on average 1.404263138552003) internal successors, (3821), 2722 states have internal predecessors, (3821), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3833 transitions. [2021-11-06 17:43:54,836 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3833 transitions. Word has length 139 [2021-11-06 17:43:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:54,837 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 3833 transitions. [2021-11-06 17:43:54,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:43:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3833 transitions. [2021-11-06 17:43:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-06 17:43:54,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:54,843 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:43:54,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 17:43:55,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-06 17:43:55,060 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -394160622, now seen corresponding path program 1 times [2021-11-06 17:43:55,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:55,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754650805] [2021-11-06 17:43:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:55,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:55,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 17:43:55,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:55,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754650805] [2021-11-06 17:43:55,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754650805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:43:55,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832398790] [2021-11-06 17:43:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:55,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:43:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:43:55,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:43:55,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 17:43:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:56,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 17:43:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:43:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 17:43:56,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832398790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:43:56,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:43:56,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 17:43:56,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106831719] [2021-11-06 17:43:56,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 17:43:56,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:43:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 17:43:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:43:56,344 INFO L87 Difference]: Start difference. First operand 2732 states and 3833 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 17:43:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:43:56,474 INFO L93 Difference]: Finished difference Result 5447 states and 7649 transitions. [2021-11-06 17:43:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 17:43:56,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 139 [2021-11-06 17:43:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:43:56,481 INFO L225 Difference]: With dead ends: 5447 [2021-11-06 17:43:56,481 INFO L226 Difference]: Without dead ends: 2735 [2021-11-06 17:43:56,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 17:43:56,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-11-06 17:43:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2734. [2021-11-06 17:43:56,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2723 states have (on average 1.4039662137348512) internal successors, (3823), 2724 states have internal predecessors, (3823), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:43:56,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3835 transitions. [2021-11-06 17:43:56,603 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3835 transitions. Word has length 139 [2021-11-06 17:43:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:43:56,603 INFO L470 AbstractCegarLoop]: Abstraction has 2734 states and 3835 transitions. [2021-11-06 17:43:56,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 17:43:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3835 transitions. [2021-11-06 17:43:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-06 17:43:56,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:43:56,608 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:43:56,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 17:43:56,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:43:56,831 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:43:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:43:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1608624430, now seen corresponding path program 2 times [2021-11-06 17:43:56,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:43:56,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837737806] [2021-11-06 17:43:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:43:56,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:43:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:43:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 17:43:56,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:43:56,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837737806] [2021-11-06 17:43:56,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837737806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:43:56,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305107304] [2021-11-06 17:43:56,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 17:43:56,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:43:56,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:43:56,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:43:56,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 17:44:05,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 17:44:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:44:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 2560 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 17:44:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:44:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-06 17:44:05,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305107304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:44:05,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:44:05,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-06 17:44:05,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702208155] [2021-11-06 17:44:05,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:44:05,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:44:05,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:44:05,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:44:05,723 INFO L87 Difference]: Start difference. First operand 2734 states and 3835 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:44:05,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:44:05,959 INFO L93 Difference]: Finished difference Result 5461 states and 7675 transitions. [2021-11-06 17:44:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:44:05,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-06 17:44:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:44:05,966 INFO L225 Difference]: With dead ends: 5461 [2021-11-06 17:44:05,966 INFO L226 Difference]: Without dead ends: 2747 [2021-11-06 17:44:05,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:44:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-11-06 17:44:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2021-11-06 17:44:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2736 states have (on average 1.402046783625731) internal successors, (3836), 2737 states have internal predecessors, (3836), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:44:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3848 transitions. [2021-11-06 17:44:06,090 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3848 transitions. Word has length 141 [2021-11-06 17:44:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:44:06,090 INFO L470 AbstractCegarLoop]: Abstraction has 2747 states and 3848 transitions. [2021-11-06 17:44:06,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:44:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3848 transitions. [2021-11-06 17:44:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-06 17:44:06,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:44:06,096 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:06,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 17:44:06,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:44:06,322 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:44:06,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:44:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1825357932, now seen corresponding path program 1 times [2021-11-06 17:44:06,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:44:06,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706808209] [2021-11-06 17:44:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:44:06,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:44:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:44:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 17:44:06,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:44:06,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706808209] [2021-11-06 17:44:06,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706808209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:44:06,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941297699] [2021-11-06 17:44:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:44:06,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:44:06,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:44:06,508 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:44:06,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 17:44:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:44:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 17:44:07,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:44:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 17:44:07,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941297699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:44:07,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:44:07,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 17:44:07,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560163479] [2021-11-06 17:44:07,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 17:44:07,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:44:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 17:44:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:44:07,612 INFO L87 Difference]: Start difference. First operand 2747 states and 3848 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:44:07,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:44:07,745 INFO L93 Difference]: Finished difference Result 5477 states and 7679 transitions. [2021-11-06 17:44:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 17:44:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-06 17:44:07,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:44:07,751 INFO L225 Difference]: With dead ends: 5477 [2021-11-06 17:44:07,751 INFO L226 Difference]: Without dead ends: 2750 [2021-11-06 17:44:07,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 17:44:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-11-06 17:44:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2749. [2021-11-06 17:44:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2738 states have (on average 1.4017531044558071) internal successors, (3838), 2739 states have internal predecessors, (3838), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:44:07,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 3850 transitions. [2021-11-06 17:44:07,875 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 3850 transitions. Word has length 143 [2021-11-06 17:44:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:44:07,876 INFO L470 AbstractCegarLoop]: Abstraction has 2749 states and 3850 transitions. [2021-11-06 17:44:07,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:44:07,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 3850 transitions. [2021-11-06 17:44:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-06 17:44:07,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:44:07,882 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:07,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 17:44:08,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:44:08,097 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:44:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:44:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1886691152, now seen corresponding path program 2 times [2021-11-06 17:44:08,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:44:08,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087458921] [2021-11-06 17:44:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:44:08,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:44:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:44:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 17:44:08,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:44:08,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087458921] [2021-11-06 17:44:08,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087458921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:44:08,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189701610] [2021-11-06 17:44:08,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 17:44:08,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:44:08,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:44:08,271 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:44:08,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 17:44:23,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 17:44:23,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 17:44:23,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 2560 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 17:44:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:44:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 17:44:23,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189701610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 17:44:23,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 17:44:23,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-06 17:44:23,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038232873] [2021-11-06 17:44:23,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 17:44:23,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:44:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 17:44:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:44:23,480 INFO L87 Difference]: Start difference. First operand 2749 states and 3850 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:44:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:44:24,027 INFO L93 Difference]: Finished difference Result 5479 states and 7681 transitions. [2021-11-06 17:44:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 17:44:24,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-06 17:44:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:44:24,035 INFO L225 Difference]: With dead ends: 5479 [2021-11-06 17:44:24,035 INFO L226 Difference]: Without dead ends: 2750 [2021-11-06 17:44:24,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:44:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-11-06 17:44:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2750. [2021-11-06 17:44:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2739 states have (on average 1.4016064257028114) internal successors, (3839), 2740 states have internal predecessors, (3839), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:44:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 3851 transitions. [2021-11-06 17:44:24,159 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 3851 transitions. Word has length 145 [2021-11-06 17:44:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:44:24,159 INFO L470 AbstractCegarLoop]: Abstraction has 2750 states and 3851 transitions. [2021-11-06 17:44:24,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:44:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 3851 transitions. [2021-11-06 17:44:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-06 17:44:24,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:44:24,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:44:24,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 17:44:24,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:44:24,380 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:44:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:44:24,380 INFO L85 PathProgramCache]: Analyzing trace with hash 830085101, now seen corresponding path program 1 times [2021-11-06 17:44:24,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:44:24,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322034332] [2021-11-06 17:44:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:44:24,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:44:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:44:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 17:44:24,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:44:24,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322034332] [2021-11-06 17:44:24,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322034332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:44:24,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11961360] [2021-11-06 17:44:24,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:44:24,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:44:24,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:44:24,531 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:44:24,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 17:44:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:44:25,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2739 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 17:44:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 17:44:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 17:44:25,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11961360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:44:25,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 17:44:25,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 17:44:25,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493171414] [2021-11-06 17:44:25,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 17:44:25,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 17:44:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 17:44:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:44:25,736 INFO L87 Difference]: Start difference. First operand 2750 states and 3851 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:44:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 17:44:25,873 INFO L93 Difference]: Finished difference Result 5483 states and 7685 transitions. [2021-11-06 17:44:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 17:44:25,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-06 17:44:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 17:44:25,879 INFO L225 Difference]: With dead ends: 5483 [2021-11-06 17:44:25,879 INFO L226 Difference]: Without dead ends: 2753 [2021-11-06 17:44:25,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 17:44:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2021-11-06 17:44:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2752. [2021-11-06 17:44:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2741 states have (on average 1.4013133892739875) internal successors, (3841), 2742 states have internal predecessors, (3841), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-06 17:44:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 3853 transitions. [2021-11-06 17:44:26,115 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 3853 transitions. Word has length 146 [2021-11-06 17:44:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 17:44:26,116 INFO L470 AbstractCegarLoop]: Abstraction has 2752 states and 3853 transitions. [2021-11-06 17:44:26,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 17:44:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 3853 transitions. [2021-11-06 17:44:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-06 17:44:26,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 17:44:26,120 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 17:44:26,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-06 17:44:26,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-06 17:44:26,335 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 17:44:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 17:44:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1648025975, now seen corresponding path program 2 times [2021-11-06 17:44:26,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 17:44:26,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98812030] [2021-11-06 17:44:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 17:44:26,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 17:44:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 17:44:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-06 17:44:26,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 17:44:26,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98812030] [2021-11-06 17:44:26,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98812030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 17:44:26,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822205810] [2021-11-06 17:44:26,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 17:44:26,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 17:44:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 17:44:26,543 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 17:44:26,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process Killed by 15