./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 4d014703 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-wip.dd.seqcomp-4d01470 [2021-11-02 22:43:38,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:43:38,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:43:38,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:43:38,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:43:38,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:43:38,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:43:38,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:43:38,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:43:38,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:43:38,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:43:38,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:43:38,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:43:38,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:43:38,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:43:38,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:43:38,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:43:38,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:43:38,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:43:38,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:43:38,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:43:38,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:43:38,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:43:38,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:43:38,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:43:38,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:43:38,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:43:38,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:43:38,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:43:38,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:43:38,579 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:43:38,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:43:38,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:43:38,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:43:38,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:43:38,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:43:38,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:43:38,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:43:38,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:43:38,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:43:38,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:43:38,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 22:43:38,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:43:38,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:43:38,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:43:38,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:43:38,601 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:43:38,601 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:43:38,602 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:43:38,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:43:38,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:43:38,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:43:38,602 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:43:38,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:43:38,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:43:38,603 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:43:38,603 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:43:38,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:43:38,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:43:38,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:43:38,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:43:38,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:43:38,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:43:38,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:43:38,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:43:38,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:43:38,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:43:38,605 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:43:38,605 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:43:38,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:43:38,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:43:38,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 [2021-11-02 22:43:38,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:43:38,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:43:38,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:43:38,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:43:38,826 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:43:38,828 INFO L432 ainManager$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 [2021-11-02 22:43:38,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8507f3a8/05fa23e1580443979e42a7b1f5f76cf4/FLAG0bd8b88f4 [2021-11-02 22:43:39,390 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:43:39,391 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 [2021-11-02 22:43:39,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8507f3a8/05fa23e1580443979e42a7b1f5f76cf4/FLAG0bd8b88f4 [2021-11-02 22:43:39,675 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8507f3a8/05fa23e1580443979e42a7b1f5f76cf4 [2021-11-02 22:43:39,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:43:39,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:43:39,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:43:39,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:43:39,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:43:39,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:43:39" (1/1) ... [2021-11-02 22:43:39,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66d45ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:39, skipping insertion in model container [2021-11-02 22:43:39,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:43:39" (1/1) ... [2021-11-02 22:43:39,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:43:39,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:43:40,453 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] [2021-11-02 22:43:40,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:43:40,489 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:43:40,672 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] [2021-11-02 22:43:40,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:43:40,734 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:43:40,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40 WrapperNode [2021-11-02 22:43:40,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:43:40,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:43:40,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:43:40,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:43:40,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:40,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:43:41,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:43:41,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:43:41,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:43:41,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:43:41,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:43:41,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:43:41,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:43:41,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (1/1) ... [2021-11-02 22:43:41,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:43:41,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:43:41,884 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) [2021-11-02 22:43:41,904 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 [2021-11-02 22:43:41,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 22:43:41,922 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-02 22:43:41,922 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-02 22:43:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-02 22:43:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 22:43:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 22:43:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:43:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:43:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-02 22:43:41,923 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-02 22:43:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:43:41,923 INFO L130 BoogieDeclarations]: Found specification of procedure rdac_bus_detach [2021-11-02 22:43:41,924 INFO L138 BoogieDeclarations]: Found implementation of procedure rdac_bus_detach [2021-11-02 22:43:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:43:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:43:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-02 22:43:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:43:41,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 22:43:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:43:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-02 22:43:41,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:43:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:43:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:43:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 22:43:41,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:43:41,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:43:44,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:43:44,940 INFO L299 CfgBuilder]: Removed 3524 assume(true) statements. [2021-11-02 22:43:44,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:43:44 BoogieIcfgContainer [2021-11-02 22:43:44,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:43:44,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:43:44,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:43:44,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:43:44,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:43:39" (1/3) ... [2021-11-02 22:43:44,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8aebd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:43:44, skipping insertion in model container [2021-11-02 22:43:44,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:43:40" (2/3) ... [2021-11-02 22:43:44,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b8aebd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:43:44, skipping insertion in model container [2021-11-02 22:43:44,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:43:44" (3/3) ... [2021-11-02 22:43:44,949 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 [2021-11-02 22:43:44,953 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:43:44,953 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-02 22:43:44,990 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:43:44,994 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 [2021-11-02 22:43:44,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 22:43:45,043 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) [2021-11-02 22:43:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:43:45,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:43:45,048 INFO L514 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] [2021-11-02 22:43:45,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash -792164640, now seen corresponding path program 1 times [2021-11-02 22:43:45,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:45,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600008939] [2021-11-02 22:43:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:45,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:45,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:45,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600008939] [2021-11-02 22:43:45,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600008939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:43:45,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:43:45,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:43:45,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804733246] [2021-11-02 22:43:45,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:43:45,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:45,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:43:45,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:43:45,457 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) [2021-11-02 22:43:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:51,097 INFO L93 Difference]: Finished difference Result 7348 states and 10581 transitions. [2021-11-02 22:43:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:43:51,100 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 [2021-11-02 22:43:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:51,118 INFO L225 Difference]: With dead ends: 7348 [2021-11-02 22:43:51,118 INFO L226 Difference]: Without dead ends: 2283 [2021-11-02 22:43:51,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:43:51,145 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4374.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 5177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.06ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5356.58ms IncrementalHoareTripleChecker+Time [2021-11-02 22:43:51,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 5177 Unknown, 0 Unchecked, 9.06ms Time], IncrementalHoareTripleChecker [0 Valid, 5177 Invalid, 0 Unknown, 0 Unchecked, 5356.58ms Time] [2021-11-02 22:43:51,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-11-02 22:43:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2283. [2021-11-02 22:43:51,248 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) [2021-11-02 22:43:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3215 transitions. [2021-11-02 22:43:51,258 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3215 transitions. Word has length 30 [2021-11-02 22:43:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:51,259 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3215 transitions. [2021-11-02 22:43:51,259 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) [2021-11-02 22:43:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3215 transitions. [2021-11-02 22:43:51,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:43:51,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:43:51,260 INFO L514 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] [2021-11-02 22:43:51,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:43:51,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:51,262 INFO L85 PathProgramCache]: Analyzing trace with hash -557880348, now seen corresponding path program 1 times [2021-11-02 22:43:51,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:51,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409216093] [2021-11-02 22:43:51,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:51,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:43:51,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:51,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409216093] [2021-11-02 22:43:51,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409216093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:43:51,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:43:51,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:43:51,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238477275] [2021-11-02 22:43:51,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:43:51,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:43:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:43:51,455 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) [2021-11-02 22:43:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:57,381 INFO L93 Difference]: Finished difference Result 4551 states and 6415 transitions. [2021-11-02 22:43:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:43:57,382 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 [2021-11-02 22:43:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:57,389 INFO L225 Difference]: With dead ends: 4551 [2021-11-02 22:43:57,389 INFO L226 Difference]: Without dead ends: 2284 [2021-11-02 22:43:57,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.66ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:43:57,393 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 6405 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4912.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.87ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5751.87ms IncrementalHoareTripleChecker+Time [2021-11-02 22:43:57,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 6405 Unknown, 0 Unchecked, 14.87ms Time], IncrementalHoareTripleChecker [0 Valid, 6405 Invalid, 0 Unknown, 0 Unchecked, 5751.87ms Time] [2021-11-02 22:43:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-11-02 22:43:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2284. [2021-11-02 22:43:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2271 states have (on average 1.4108322324966975) internal successors, (3204), 2274 states have internal predecessors, (3204), 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) [2021-11-02 22:43:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3216 transitions. [2021-11-02 22:43:57,427 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3216 transitions. Word has length 30 [2021-11-02 22:43:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:57,428 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 3216 transitions. [2021-11-02 22:43:57,428 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) [2021-11-02 22:43:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3216 transitions. [2021-11-02 22:43:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:43:57,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:43:57,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:57,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:43:57,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:43:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1907767630, now seen corresponding path program 1 times [2021-11-02 22:43:57,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:57,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822276690] [2021-11-02 22:43:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:57,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:43:57,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:57,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822276690] [2021-11-02 22:43:57,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822276690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:43:57,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:43:57,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:43:57,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804176323] [2021-11-02 22:43:57,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:43:57,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:43:57,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:43:57,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:43:57,526 INFO L87 Difference]: Start difference. First operand 2284 states and 3216 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-11-02 22:44:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:02,860 INFO L93 Difference]: Finished difference Result 4924 states and 6948 transitions. [2021-11-02 22:44:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:44:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 31 [2021-11-02 22:44:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:02,870 INFO L225 Difference]: With dead ends: 4924 [2021-11-02 22:44:02,870 INFO L226 Difference]: Without dead ends: 2660 [2021-11-02 22:44:02,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.57ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:44:02,876 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 549 mSDsluCounter, 3169 mSDsCounter, 0 mSdLazyCounter, 6383 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4277.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.35ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5183.06ms IncrementalHoareTripleChecker+Time [2021-11-02 22:44:02,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 24 Invalid, 6387 Unknown, 0 Unchecked, 14.35ms Time], IncrementalHoareTripleChecker [4 Valid, 6383 Invalid, 0 Unknown, 0 Unchecked, 5183.06ms Time] [2021-11-02 22:44:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-11-02 22:44:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2659. [2021-11-02 22:44:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2646 states have (on average 1.4130763416477703) internal successors, (3739), 2649 states have internal predecessors, (3739), 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) [2021-11-02 22:44:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 3751 transitions. [2021-11-02 22:44:02,922 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 3751 transitions. Word has length 31 [2021-11-02 22:44:02,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:02,922 INFO L470 AbstractCegarLoop]: Abstraction has 2659 states and 3751 transitions. [2021-11-02 22:44:02,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2021-11-02 22:44:02,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 3751 transitions. [2021-11-02 22:44:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:44:02,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:44:02,924 INFO L514 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] [2021-11-02 22:44:02,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:44:02,925 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:02,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1528037929, now seen corresponding path program 1 times [2021-11-02 22:44:02,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:02,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19708387] [2021-11-02 22:44:02,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:02,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:44:03,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:03,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19708387] [2021-11-02 22:44:03,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19708387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:44:03,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:44:03,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:44:03,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874196275] [2021-11-02 22:44:03,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:44:03,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:03,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:44:03,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:44:03,055 INFO L87 Difference]: Start difference. First operand 2659 states and 3751 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:16,621 INFO L93 Difference]: Finished difference Result 7905 states and 11172 transitions. [2021-11-02 22:44:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:44:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:44:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:16,649 INFO L225 Difference]: With dead ends: 7905 [2021-11-02 22:44:16,649 INFO L226 Difference]: Without dead ends: 5266 [2021-11-02 22:44:16,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.39ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:44:16,660 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 4739 mSDsluCounter, 12246 mSDsCounter, 0 mSdLazyCounter, 16493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11427.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4741 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 16500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.37ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13225.06ms IncrementalHoareTripleChecker+Time [2021-11-02 22:44:16,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4741 Valid, 56 Invalid, 16500 Unknown, 0 Unchecked, 41.37ms Time], IncrementalHoareTripleChecker [7 Valid, 16493 Invalid, 0 Unknown, 0 Unchecked, 13225.06ms Time] [2021-11-02 22:44:16,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2021-11-02 22:44:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 2662. [2021-11-02 22:44:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 2649 states have (on average 1.4126085315213288) internal successors, (3742), 2652 states have internal predecessors, (3742), 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) [2021-11-02 22:44:16,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3754 transitions. [2021-11-02 22:44:16,744 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3754 transitions. Word has length 51 [2021-11-02 22:44:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:16,745 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 3754 transitions. [2021-11-02 22:44:16,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3754 transitions. [2021-11-02 22:44:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:44:16,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:44:16,748 INFO L514 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] [2021-11-02 22:44:16,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:44:16,749 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1481254964, now seen corresponding path program 1 times [2021-11-02 22:44:16,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:16,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799111559] [2021-11-02 22:44:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:16,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:44:16,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:16,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799111559] [2021-11-02 22:44:16,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799111559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:44:16,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:44:16,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:44:16,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290245326] [2021-11-02 22:44:16,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:44:16,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:16,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:44:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:44:16,896 INFO L87 Difference]: Start difference. First operand 2662 states and 3754 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 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) [2021-11-02 22:44:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:20,937 INFO L93 Difference]: Finished difference Result 2715 states and 3830 transitions. [2021-11-02 22:44:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:44:20,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 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 52 [2021-11-02 22:44:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:20,951 INFO L225 Difference]: With dead ends: 2715 [2021-11-02 22:44:20,951 INFO L226 Difference]: Without dead ends: 2711 [2021-11-02 22:44:20,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.63ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:44:20,953 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2866 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 3526 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3284.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2866 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.12ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3938.91ms IncrementalHoareTripleChecker+Time [2021-11-02 22:44:20,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2866 Valid, 24 Invalid, 3553 Unknown, 0 Unchecked, 7.12ms Time], IncrementalHoareTripleChecker [27 Valid, 3526 Invalid, 0 Unknown, 0 Unchecked, 3938.91ms Time] [2021-11-02 22:44:20,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-11-02 22:44:21,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2658. [2021-11-02 22:44:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2647 states have (on average 1.4121647147714393) 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) [2021-11-02 22:44:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 3750 transitions. [2021-11-02 22:44:21,016 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 3750 transitions. Word has length 52 [2021-11-02 22:44:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:21,017 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 3750 transitions. [2021-11-02 22:44:21,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 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) [2021-11-02 22:44:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 3750 transitions. [2021-11-02 22:44:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-02 22:44:21,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:44:21,022 INFO L514 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] [2021-11-02 22:44:21,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:44:21,022 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1689270316, now seen corresponding path program 1 times [2021-11-02 22:44:21,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:21,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921416227] [2021-11-02 22:44:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:21,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:44:21,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:21,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921416227] [2021-11-02 22:44:21,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921416227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:44:21,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:44:21,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:44:21,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405718230] [2021-11-02 22:44:21,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:44:21,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:21,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:44:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:44:21,189 INFO L87 Difference]: Start difference. First operand 2658 states and 3750 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:38,328 INFO L93 Difference]: Finished difference Result 9911 states and 14088 transitions. [2021-11-02 22:44:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:44:38,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-02 22:44:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:38,356 INFO L225 Difference]: With dead ends: 9911 [2021-11-02 22:44:38,357 INFO L226 Difference]: Without dead ends: 7273 [2021-11-02 22:44:38,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.16ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:44:38,367 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 9433 mSDsluCounter, 20162 mSDsCounter, 0 mSdLazyCounter, 24834 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14142.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9433 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 24863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.83ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 24834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16696.82ms IncrementalHoareTripleChecker+Time [2021-11-02 22:44:38,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9433 Valid, 102 Invalid, 24863 Unknown, 0 Unchecked, 47.83ms Time], IncrementalHoareTripleChecker [29 Valid, 24834 Invalid, 0 Unknown, 0 Unchecked, 16696.82ms Time] [2021-11-02 22:44:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7273 states. [2021-11-02 22:44:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7273 to 2664. [2021-11-02 22:44:38,439 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) [2021-11-02 22:44:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 3756 transitions. [2021-11-02 22:44:38,442 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 3756 transitions. Word has length 88 [2021-11-02 22:44:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:38,444 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 3756 transitions. [2021-11-02 22:44:38,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 3756 transitions. [2021-11-02 22:44:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-02 22:44:38,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:44:38,448 INFO L514 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] [2021-11-02 22:44:38,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:44:38,448 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:38,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1909976592, now seen corresponding path program 1 times [2021-11-02 22:44:38,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:38,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139226109] [2021-11-02 22:44:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:38,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:44:38,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:38,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139226109] [2021-11-02 22:44:38,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139226109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:44:38,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:44:38,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:44:38,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995214095] [2021-11-02 22:44:38,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:44:38,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:38,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:44:38,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:44:38,549 INFO L87 Difference]: Start difference. First operand 2664 states and 3756 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-11-02 22:44:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:44,274 INFO L93 Difference]: Finished difference Result 5321 states and 7517 transitions. [2021-11-02 22:44:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:44:44,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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 93 [2021-11-02 22:44:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:44,288 INFO L225 Difference]: With dead ends: 5321 [2021-11-02 22:44:44,288 INFO L226 Difference]: Without dead ends: 2677 [2021-11-02 22:44:44,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.33ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:44:44,296 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 3154 mSDsCounter, 0 mSdLazyCounter, 6389 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4706.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.30ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 6389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5578.20ms IncrementalHoareTripleChecker+Time [2021-11-02 22:44:44,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 6405 Unknown, 0 Unchecked, 10.30ms Time], IncrementalHoareTripleChecker [16 Valid, 6389 Invalid, 0 Unknown, 0 Unchecked, 5578.20ms Time] [2021-11-02 22:44:44,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-11-02 22:44:44,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2677. [2021-11-02 22:44:44,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2666 states have (on average 1.4092273068267067) internal successors, (3757), 2667 states have internal predecessors, (3757), 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) [2021-11-02 22:44:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 3769 transitions. [2021-11-02 22:44:44,348 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 3769 transitions. Word has length 93 [2021-11-02 22:44:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:44,348 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 3769 transitions. [2021-11-02 22:44:44,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2021-11-02 22:44:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 3769 transitions. [2021-11-02 22:44:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 22:44:44,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:44:44,352 INFO L514 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] [2021-11-02 22:44:44,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:44:44,353 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:44:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1389658946, now seen corresponding path program 1 times [2021-11-02 22:44:44,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:44,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413465643] [2021-11-02 22:44:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:44,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:44:44,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:44,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413465643] [2021-11-02 22:44:44,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413465643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:44:44,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:44:44,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:44:44,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238498287] [2021-11-02 22:44:44,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:44:44,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:44:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:44:44,485 INFO L87 Difference]: Start difference. First operand 2677 states and 3769 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:03,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:03,225 INFO L93 Difference]: Finished difference Result 9998 states and 14175 transitions. [2021-11-02 22:45:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:45:03,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 22:45:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:03,246 INFO L225 Difference]: With dead ends: 9998 [2021-11-02 22:45:03,247 INFO L226 Difference]: Without dead ends: 7341 [2021-11-02 22:45:03,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.07ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:45:03,255 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8921 mSDsluCounter, 21018 mSDsCounter, 0 mSdLazyCounter, 25992 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15581.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8921 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 26019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.85ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 25992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18233.94ms IncrementalHoareTripleChecker+Time [2021-11-02 22:45:03,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8921 Valid, 108 Invalid, 26019 Unknown, 0 Unchecked, 46.85ms Time], IncrementalHoareTripleChecker [27 Valid, 25992 Invalid, 0 Unknown, 0 Unchecked, 18233.94ms Time] [2021-11-02 22:45:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2021-11-02 22:45:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 2678. [2021-11-02 22:45:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2667 states have (on average 1.4090738657667792) internal successors, (3758), 2668 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) [2021-11-02 22:45:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3770 transitions. [2021-11-02 22:45:03,342 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3770 transitions. Word has length 94 [2021-11-02 22:45:03,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:03,342 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3770 transitions. [2021-11-02 22:45:03,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:03,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3770 transitions. [2021-11-02 22:45:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 22:45:03,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:45:03,346 INFO L514 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] [2021-11-02 22:45:03,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:45:03,347 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:45:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1327619332, now seen corresponding path program 1 times [2021-11-02 22:45:03,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:03,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279339662] [2021-11-02 22:45:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:03,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:45:03,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:03,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279339662] [2021-11-02 22:45:03,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279339662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:03,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:03,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:45:03,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322101168] [2021-11-02 22:45:03,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:45:03,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:03,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:45:03,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:45:03,474 INFO L87 Difference]: Start difference. First operand 2678 states and 3770 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:05,757 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:45:17,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:17,895 INFO L93 Difference]: Finished difference Result 8294 states and 11722 transitions. [2021-11-02 22:45:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:45:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 22:45:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:17,915 INFO L225 Difference]: With dead ends: 8294 [2021-11-02 22:45:17,916 INFO L226 Difference]: Without dead ends: 5636 [2021-11-02 22:45:17,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.20ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:45:17,922 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3576 mSDsluCounter, 11753 mSDsCounter, 0 mSdLazyCounter, 16491 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12244.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3578 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 16517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.22ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 16491 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14067.37ms IncrementalHoareTripleChecker+Time [2021-11-02 22:45:17,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3578 Valid, 68 Invalid, 16517 Unknown, 0 Unchecked, 27.22ms Time], IncrementalHoareTripleChecker [25 Valid, 16491 Invalid, 1 Unknown, 0 Unchecked, 14067.37ms Time] [2021-11-02 22:45:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-11-02 22:45:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 2681. [2021-11-02 22:45:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2670 states have (on average 1.408614232209738) internal successors, (3761), 2671 states have internal predecessors, (3761), 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) [2021-11-02 22:45:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3773 transitions. [2021-11-02 22:45:17,997 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3773 transitions. Word has length 94 [2021-11-02 22:45:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:17,997 INFO L470 AbstractCegarLoop]: Abstraction has 2681 states and 3773 transitions. [2021-11-02 22:45:17,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3773 transitions. [2021-11-02 22:45:18,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 22:45:18,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:45:18,003 INFO L514 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] [2021-11-02 22:45:18,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:45:18,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:45:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash 943196004, now seen corresponding path program 1 times [2021-11-02 22:45:18,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:18,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636523801] [2021-11-02 22:45:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:18,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:45:18,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:18,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636523801] [2021-11-02 22:45:18,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636523801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:18,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251312542] [2021-11-02 22:45:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:18,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:18,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:45:18,181 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) [2021-11-02 22:45:18,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:45:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 2387 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:45:18,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:45:19,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:45:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:45:19,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251312542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:45:19,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:45:19,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-02 22:45:19,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389815422] [2021-11-02 22:45:19,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:45:19,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:45:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:45:19,273 INFO L87 Difference]: Start difference. First operand 2681 states and 3773 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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) [2021-11-02 22:45:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:28,857 INFO L93 Difference]: Finished difference Result 5455 states and 7748 transitions. [2021-11-02 22:45:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:45:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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 100 [2021-11-02 22:45:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:28,864 INFO L225 Difference]: With dead ends: 5455 [2021-11-02 22:45:28,865 INFO L226 Difference]: Without dead ends: 2791 [2021-11-02 22:45:28,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.68ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:45:28,871 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 9462 mSDsCounter, 0 mSdLazyCounter, 12813 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7985.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 12969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.61ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 12813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9371.71ms IncrementalHoareTripleChecker+Time [2021-11-02 22:45:28,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 12969 Unknown, 0 Unchecked, 17.61ms Time], IncrementalHoareTripleChecker [156 Valid, 12813 Invalid, 0 Unknown, 0 Unchecked, 9371.71ms Time] [2021-11-02 22:45:28,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-11-02 22:45:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2791. [2021-11-02 22:45:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2780 states have (on average 1.3924460431654677) internal successors, (3871), 2781 states have internal predecessors, (3871), 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) [2021-11-02 22:45:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3883 transitions. [2021-11-02 22:45:28,949 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3883 transitions. Word has length 100 [2021-11-02 22:45:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:28,950 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 3883 transitions. [2021-11-02 22:45:28,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 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) [2021-11-02 22:45:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3883 transitions. [2021-11-02 22:45:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-02 22:45:28,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:45:28,955 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-02 22:45:28,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:29,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:45:29,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:45:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash 321898192, now seen corresponding path program 2 times [2021-11-02 22:45:29,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:29,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046803492] [2021-11-02 22:45:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:29,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-02 22:45:29,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:29,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046803492] [2021-11-02 22:45:29,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046803492] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:29,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915918959] [2021-11-02 22:45:29,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:45:29,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:29,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:45:29,408 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) [2021-11-02 22:45:29,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:45:29,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:45:29,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:45:29,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:45:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-02 22:45:30,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:45:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915918959] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:30,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:45:30,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-02 22:45:30,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670331323] [2021-11-02 22:45:30,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:45:30,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:45:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:45:30,162 INFO L87 Difference]: Start difference. First operand 2791 states and 3883 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2021-11-02 22:45:32,352 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:45:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:43,241 INFO L93 Difference]: Finished difference Result 10640 states and 14804 transitions. [2021-11-02 22:45:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:45:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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 [2021-11-02 22:45:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:43,300 INFO L225 Difference]: With dead ends: 10640 [2021-11-02 22:45:43,300 INFO L226 Difference]: Without dead ends: 7872 [2021-11-02 22:45:43,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.10ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:45:43,323 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 6943 mSDsluCounter, 11927 mSDsCounter, 0 mSdLazyCounter, 15885 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10922.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6946 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 15898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.44ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 15885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12621.97ms IncrementalHoareTripleChecker+Time [2021-11-02 22:45:43,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6946 Valid, 62 Invalid, 15898 Unknown, 0 Unchecked, 24.44ms Time], IncrementalHoareTripleChecker [13 Valid, 15885 Invalid, 0 Unknown, 0 Unchecked, 12621.97ms Time] [2021-11-02 22:45:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7872 states. [2021-11-02 22:45:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7872 to 2791. [2021-11-02 22:45:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2780 states have (on average 1.3924460431654677) internal successors, (3871), 2781 states have internal predecessors, (3871), 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) [2021-11-02 22:45:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3883 transitions. [2021-11-02 22:45:43,428 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3883 transitions. Word has length 109 [2021-11-02 22:45:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:43,428 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 3883 transitions. [2021-11-02 22:45:43,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2021-11-02 22:45:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3883 transitions. [2021-11-02 22:45:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-02 22:45:43,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:45:43,441 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-02 22:45:43,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:43,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:45:43,655 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:45:43,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:43,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1754967492, now seen corresponding path program 1 times [2021-11-02 22:45:43,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:43,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879364720] [2021-11-02 22:45:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:43,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-02 22:45:43,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:43,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879364720] [2021-11-02 22:45:43,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879364720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:43,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:43,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:45:43,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841221578] [2021-11-02 22:45:43,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:45:43,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:45:43,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:45:43,830 INFO L87 Difference]: Start difference. First operand 2791 states and 3883 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-11-02 22:45:45,698 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:45:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:51,012 INFO L93 Difference]: Finished difference Result 5560 states and 7744 transitions. [2021-11-02 22:45:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:45:51,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 126 [2021-11-02 22:45:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:51,018 INFO L225 Difference]: With dead ends: 5560 [2021-11-02 22:45:51,018 INFO L226 Difference]: Without dead ends: 2792 [2021-11-02 22:45:51,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.51ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:45:51,023 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 6397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6056.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7017.59ms IncrementalHoareTripleChecker+Time [2021-11-02 22:45:51,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 6397 Unknown, 0 Unchecked, 8.31ms Time], IncrementalHoareTripleChecker [0 Valid, 6397 Invalid, 0 Unknown, 0 Unchecked, 7017.59ms Time] [2021-11-02 22:45:51,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-11-02 22:45:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2792. [2021-11-02 22:45:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2781 states have (on average 1.3923049262855087) internal successors, (3872), 2782 states have internal predecessors, (3872), 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) [2021-11-02 22:45:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3884 transitions. [2021-11-02 22:45:51,095 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3884 transitions. Word has length 126 [2021-11-02 22:45:51,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:51,095 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 3884 transitions. [2021-11-02 22:45:51,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-11-02 22:45:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3884 transitions. [2021-11-02 22:45:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-02 22:45:51,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:45:51,101 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-02 22:45:51,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:45:51,101 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:45:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2003113986, now seen corresponding path program 1 times [2021-11-02 22:45:51,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:51,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313349111] [2021-11-02 22:45:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:51,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-02 22:45:51,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:51,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313349111] [2021-11-02 22:45:51,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313349111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:51,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:51,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:45:51,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852479748] [2021-11-02 22:45:51,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:45:51,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:45:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:45:51,196 INFO L87 Difference]: Start difference. First operand 2792 states and 3884 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-11-02 22:45:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:56,781 INFO L93 Difference]: Finished difference Result 5563 states and 7747 transitions. [2021-11-02 22:45:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:45:56,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 126 [2021-11-02 22:45:56,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:56,788 INFO L225 Difference]: With dead ends: 5563 [2021-11-02 22:45:56,788 INFO L226 Difference]: Without dead ends: 2794 [2021-11-02 22:45:56,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.55ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:45:56,794 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 6397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4568.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5443.85ms IncrementalHoareTripleChecker+Time [2021-11-02 22:45:56,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 6397 Unknown, 0 Unchecked, 7.16ms Time], IncrementalHoareTripleChecker [0 Valid, 6397 Invalid, 0 Unknown, 0 Unchecked, 5443.85ms Time] [2021-11-02 22:45:56,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-11-02 22:45:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2793. [2021-11-02 22:45:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2782 states have (on average 1.3921639108554997) internal successors, (3873), 2783 states have internal predecessors, (3873), 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) [2021-11-02 22:45:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 3885 transitions. [2021-11-02 22:45:56,867 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 3885 transitions. Word has length 126 [2021-11-02 22:45:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:56,867 INFO L470 AbstractCegarLoop]: Abstraction has 2793 states and 3885 transitions. [2021-11-02 22:45:56,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2021-11-02 22:45:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 3885 transitions. [2021-11-02 22:45:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 22:45:56,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:45:56,872 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-02 22:45:56,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:45:56,873 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:45:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:56,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1193788958, now seen corresponding path program 1 times [2021-11-02 22:45:56,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:56,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249494915] [2021-11-02 22:45:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:56,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-02 22:45:56,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:56,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249494915] [2021-11-02 22:45:56,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249494915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:56,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4473353] [2021-11-02 22:45:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:56,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:56,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:45:56,996 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) [2021-11-02 22:45:57,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:45:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 2541 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:45:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-02 22:45:57,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:45:57,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4473353] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:57,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:45:57,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-02 22:45:57,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673476623] [2021-11-02 22:45:57,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:45:57,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:57,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:45:57,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:45:57,851 INFO L87 Difference]: Start difference. First operand 2793 states and 3885 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2021-11-02 22:46:05,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:05,644 INFO L93 Difference]: Finished difference Result 5573 states and 7761 transitions. [2021-11-02 22:46:05,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:46:05,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 128 [2021-11-02 22:46:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:05,651 INFO L225 Difference]: With dead ends: 5573 [2021-11-02 22:46:05,651 INFO L226 Difference]: Without dead ends: 2803 [2021-11-02 22:46:05,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.93ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:46:05,655 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 6410 mSDsCounter, 0 mSdLazyCounter, 9598 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6539.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.63ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7628.69ms IncrementalHoareTripleChecker+Time [2021-11-02 22:46:05,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 9599 Unknown, 0 Unchecked, 10.63ms Time], IncrementalHoareTripleChecker [1 Valid, 9598 Invalid, 0 Unknown, 0 Unchecked, 7628.69ms Time] [2021-11-02 22:46:05,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-11-02 22:46:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2795. [2021-11-02 22:46:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2784 states have (on average 1.391882183908046) internal successors, (3875), 2785 states have internal predecessors, (3875), 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) [2021-11-02 22:46:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3887 transitions. [2021-11-02 22:46:05,727 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3887 transitions. Word has length 128 [2021-11-02 22:46:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:05,727 INFO L470 AbstractCegarLoop]: Abstraction has 2795 states and 3887 transitions. [2021-11-02 22:46:05,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2021-11-02 22:46:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3887 transitions. [2021-11-02 22:46:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 22:46:05,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:46:05,732 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-02 22:46:05,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:05,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:05,953 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:05,953 INFO L85 PathProgramCache]: Analyzing trace with hash -734483744, now seen corresponding path program 1 times [2021-11-02 22:46:05,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:05,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631766374] [2021-11-02 22:46:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:05,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-02 22:46:06,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:06,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631766374] [2021-11-02 22:46:06,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631766374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:06,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432054131] [2021-11-02 22:46:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:06,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:06,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:46:06,094 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) [2021-11-02 22:46:06,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:46:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:46:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-02 22:46:06,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:46:06,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432054131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:46:06,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:46:06,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-02 22:46:06,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417571583] [2021-11-02 22:46:06,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:46:06,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:06,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:46:06,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:46:06,881 INFO L87 Difference]: Start difference. First operand 2795 states and 3887 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2021-11-02 22:46:13,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:13,892 INFO L93 Difference]: Finished difference Result 5570 states and 7754 transitions. [2021-11-02 22:46:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:46:13,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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 128 [2021-11-02 22:46:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:13,912 INFO L225 Difference]: With dead ends: 5570 [2021-11-02 22:46:13,912 INFO L226 Difference]: Without dead ends: 2798 [2021-11-02 22:46:13,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.52ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:46:13,928 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 6409 mSDsCounter, 0 mSdLazyCounter, 9595 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5790.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6818.97ms IncrementalHoareTripleChecker+Time [2021-11-02 22:46:13,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 9596 Unknown, 0 Unchecked, 8.97ms Time], IncrementalHoareTripleChecker [1 Valid, 9595 Invalid, 0 Unknown, 0 Unchecked, 6818.97ms Time] [2021-11-02 22:46:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-11-02 22:46:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2797. [2021-11-02 22:46:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2786 states have (on average 1.3916008614501076) internal successors, (3877), 2787 states have internal predecessors, (3877), 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) [2021-11-02 22:46:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 3889 transitions. [2021-11-02 22:46:14,128 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 3889 transitions. Word has length 128 [2021-11-02 22:46:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:14,129 INFO L470 AbstractCegarLoop]: Abstraction has 2797 states and 3889 transitions. [2021-11-02 22:46:14,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 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) [2021-11-02 22:46:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 3889 transitions. [2021-11-02 22:46:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-02 22:46:14,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:46:14,134 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-02 22:46:14,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:14,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:46:14,354 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:14,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1162016292, now seen corresponding path program 1 times [2021-11-02 22:46:14,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:14,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945047596] [2021-11-02 22:46:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:14,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-02 22:46:14,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:14,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945047596] [2021-11-02 22:46:14,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945047596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:14,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635858738] [2021-11-02 22:46:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:14,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:14,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:46:14,448 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) [2021-11-02 22:46:14,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:46:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2544 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:46:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 22:46:15,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:46:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 22:46:15,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635858738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:46:15,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:46:15,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-02 22:46:15,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523425839] [2021-11-02 22:46:15,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:46:15,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:15,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:46:15,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:46:15,418 INFO L87 Difference]: Start difference. First operand 2797 states and 3889 transitions. Second operand has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 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) [2021-11-02 22:46:17,000 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:46:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:34,401 INFO L93 Difference]: Finished difference Result 5701 states and 8009 transitions. [2021-11-02 22:46:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:46:34,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 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 128 [2021-11-02 22:46:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:34,407 INFO L225 Difference]: With dead ends: 5701 [2021-11-02 22:46:34,407 INFO L226 Difference]: Without dead ends: 2924 [2021-11-02 22:46:34,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.14ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:46:34,412 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 18982 mSDsCounter, 0 mSdLazyCounter, 22391 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16118.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 22795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.52ms SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 22391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18694.39ms IncrementalHoareTripleChecker+Time [2021-11-02 22:46:34,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 22795 Unknown, 0 Unchecked, 30.52ms Time], IncrementalHoareTripleChecker [404 Valid, 22391 Invalid, 0 Unknown, 0 Unchecked, 18694.39ms Time] [2021-11-02 22:46:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-11-02 22:46:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2923. [2021-11-02 22:46:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2912 states have (on average 1.3746565934065933) internal successors, (4003), 2913 states have internal predecessors, (4003), 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) [2021-11-02 22:46:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 4015 transitions. [2021-11-02 22:46:34,493 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 4015 transitions. Word has length 128 [2021-11-02 22:46:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:34,493 INFO L470 AbstractCegarLoop]: Abstraction has 2923 states and 4015 transitions. [2021-11-02 22:46:34,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.571428571428571) internal successors, (190), 14 states have internal predecessors, (190), 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) [2021-11-02 22:46:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 4015 transitions. [2021-11-02 22:46:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-02 22:46:34,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:46:34,498 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2021-11-02 22:46:34,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:34,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:46:34,733 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:46:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash -781516232, now seen corresponding path program 2 times [2021-11-02 22:46:34,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:34,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878033265] [2021-11-02 22:46:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:34,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-02 22:46:35,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878033265] [2021-11-02 22:46:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878033265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:35,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490702888] [2021-11-02 22:46:35,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:46:35,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:35,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:46:35,044 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) [2021-11-02 22:46:35,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:46:41,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:46:41,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:46:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 2305 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 22:46:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-02 22:46:41,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:46:41,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490702888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:46:41,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:46:41,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2021-11-02 22:46:41,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309218656] [2021-11-02 22:46:41,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:46:41,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:46:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:46:41,356 INFO L87 Difference]: Start difference. First operand 2923 states and 4015 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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) [2021-11-02 22:47:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:12,935 INFO L93 Difference]: Finished difference Result 29891 states and 40855 transitions. [2021-11-02 22:47:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:47:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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 [2021-11-02 22:47:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:12,985 INFO L225 Difference]: With dead ends: 29891 [2021-11-02 22:47:12,985 INFO L226 Difference]: Without dead ends: 26995 [2021-11-02 22:47:12,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 317.34ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:47:12,998 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 21024 mSDsluCounter, 28569 mSDsCounter, 0 mSdLazyCounter, 33804 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24950.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21033 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 34027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 79.13ms SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 33804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29069.27ms IncrementalHoareTripleChecker+Time [2021-11-02 22:47:12,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21033 Valid, 188 Invalid, 34027 Unknown, 0 Unchecked, 79.13ms Time], IncrementalHoareTripleChecker [223 Valid, 33804 Invalid, 0 Unknown, 0 Unchecked, 29069.27ms Time] [2021-11-02 22:47:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26995 states. [2021-11-02 22:47:13,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26995 to 4313. [2021-11-02 22:47:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4313 states, 4300 states have (on average 1.3623255813953488) internal successors, (5858), 4301 states have internal predecessors, (5858), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:47:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 5874 transitions. [2021-11-02 22:47:13,315 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 5874 transitions. Word has length 146 [2021-11-02 22:47:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:13,315 INFO L470 AbstractCegarLoop]: Abstraction has 4313 states and 5874 transitions. [2021-11-02 22:47:13,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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) [2021-11-02 22:47:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 5874 transitions. [2021-11-02 22:47:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-02 22:47:13,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:47:13,323 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2021-11-02 22:47:13,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-02 22:47:13,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:47:13,535 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash -78849488, now seen corresponding path program 1 times [2021-11-02 22:47:13,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:13,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534914209] [2021-11-02 22:47:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:13,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-02 22:47:13,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:13,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534914209] [2021-11-02 22:47:13,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534914209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:13,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784965906] [2021-11-02 22:47:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:13,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:13,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:47:13,820 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) [2021-11-02 22:47:13,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:47:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 2682 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:47:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:47:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-02 22:47:14,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:47:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-02 22:47:15,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784965906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:47:15,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:47:15,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2021-11-02 22:47:15,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919906836] [2021-11-02 22:47:15,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 22:47:15,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:15,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 22:47:15,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:47:15,160 INFO L87 Difference]: Start difference. First operand 4313 states and 5874 transitions. Second operand has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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) [2021-11-02 22:47:29,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:29,109 INFO L93 Difference]: Finished difference Result 9181 states and 12884 transitions. [2021-11-02 22:47:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:47:29,109 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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 150 [2021-11-02 22:47:29,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:29,117 INFO L225 Difference]: With dead ends: 9181 [2021-11-02 22:47:29,117 INFO L226 Difference]: Without dead ends: 4895 [2021-11-02 22:47:29,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 341.94ms TimeCoverageRelationStatistics Valid=370, Invalid=442, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:47:29,123 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15770 mSDsCounter, 0 mSdLazyCounter, 19412 mSolverCounterSat, 961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11423.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 20373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.78ms SdHoareTripleChecker+Time, 961 IncrementalHoareTripleChecker+Valid, 19412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13441.15ms IncrementalHoareTripleChecker+Time [2021-11-02 22:47:29,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 20373 Unknown, 0 Unchecked, 24.78ms Time], IncrementalHoareTripleChecker [961 Valid, 19412 Invalid, 0 Unknown, 0 Unchecked, 13441.15ms Time] [2021-11-02 22:47:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4895 states. [2021-11-02 22:47:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4895 to 4895. [2021-11-02 22:47:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4895 states, 4882 states have (on average 1.3191315034821793) internal successors, (6440), 4883 states have internal predecessors, (6440), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:47:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4895 states to 4895 states and 6456 transitions. [2021-11-02 22:47:29,414 INFO L78 Accepts]: Start accepts. Automaton has 4895 states and 6456 transitions. Word has length 150 [2021-11-02 22:47:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:29,414 INFO L470 AbstractCegarLoop]: Abstraction has 4895 states and 6456 transitions. [2021-11-02 22:47:29,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0) internal successors, (145), 29 states have internal predecessors, (145), 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) [2021-11-02 22:47:29,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4895 states and 6456 transitions. [2021-11-02 22:47:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-02 22:47:29,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:47:29,423 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 9, 8, 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] [2021-11-02 22:47:29,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:47:29,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:29,645 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:29,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1584643877, now seen corresponding path program 2 times [2021-11-02 22:47:29,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:29,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867082316] [2021-11-02 22:47:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:29,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-02 22:47:30,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:30,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867082316] [2021-11-02 22:47:30,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867082316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:30,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541902765] [2021-11-02 22:47:30,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:47:30,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:30,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:47:30,111 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) [2021-11-02 22:47:30,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:47:34,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:47:34,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:47:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2341 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:47:34,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:47:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2021-11-02 22:47:34,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:47:34,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541902765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:34,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:47:34,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [21] total 22 [2021-11-02 22:47:34,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367413111] [2021-11-02 22:47:34,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:47:34,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:47:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:47:34,301 INFO L87 Difference]: Start difference. First operand 4895 states and 6456 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-11-02 22:47:40,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:40,790 INFO L93 Difference]: Finished difference Result 10934 states and 14308 transitions. [2021-11-02 22:47:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:47:40,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 171 [2021-11-02 22:47:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:40,802 INFO L225 Difference]: With dead ends: 10934 [2021-11-02 22:47:40,802 INFO L226 Difference]: Without dead ends: 6066 [2021-11-02 22:47:40,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 234.10ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:47:40,822 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 388 mSDsluCounter, 3068 mSDsCounter, 0 mSdLazyCounter, 6565 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4996.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 6565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5919.97ms IncrementalHoareTripleChecker+Time [2021-11-02 22:47:40,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 27 Invalid, 6565 Unknown, 0 Unchecked, 7.69ms Time], IncrementalHoareTripleChecker [0 Valid, 6565 Invalid, 0 Unknown, 0 Unchecked, 5919.97ms Time] [2021-11-02 22:47:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6066 states. [2021-11-02 22:47:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6066 to 4895. [2021-11-02 22:47:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4895 states, 4882 states have (on average 1.318721835313396) internal successors, (6438), 4883 states have internal predecessors, (6438), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:47:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4895 states to 4895 states and 6454 transitions. [2021-11-02 22:47:41,121 INFO L78 Accepts]: Start accepts. Automaton has 4895 states and 6454 transitions. Word has length 171 [2021-11-02 22:47:41,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:41,121 INFO L470 AbstractCegarLoop]: Abstraction has 4895 states and 6454 transitions. [2021-11-02 22:47:41,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2021-11-02 22:47:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4895 states and 6454 transitions. [2021-11-02 22:47:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-02 22:47:41,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:47:41,137 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 9, 8, 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] [2021-11-02 22:47:41,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:47:41,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:41,355 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:47:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash -172109673, now seen corresponding path program 1 times [2021-11-02 22:47:41,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:41,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548856970] [2021-11-02 22:47:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:41,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-02 22:47:41,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:41,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548856970] [2021-11-02 22:47:41,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548856970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:41,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032712108] [2021-11-02 22:47:41,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:41,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:41,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:47:41,824 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) [2021-11-02 22:47:41,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:47:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 2847 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:47:42,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:47:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-02 22:47:43,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:47:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-02 22:47:44,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032712108] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:47:44,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:47:44,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 59 [2021-11-02 22:47:44,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823340312] [2021-11-02 22:47:44,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-02 22:47:44,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-02 22:47:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 22:47:44,143 INFO L87 Difference]: Start difference. First operand 4895 states and 6454 transitions. Second operand has 59 states, 59 states have (on average 3.0) internal successors, (177), 59 states have internal predecessors, (177), 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) [2021-11-02 22:48:00,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:00,181 INFO L93 Difference]: Finished difference Result 10937 states and 15228 transitions. [2021-11-02 22:48:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-02 22:48:00,181 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.0) internal successors, (177), 59 states have internal predecessors, (177), 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 173 [2021-11-02 22:48:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:00,194 INFO L225 Difference]: With dead ends: 10937 [2021-11-02 22:48:00,195 INFO L226 Difference]: Without dead ends: 6069 [2021-11-02 22:48:00,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1296.02ms TimeCoverageRelationStatistics Valid=1540, Invalid=1882, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 22:48:00,204 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 15765 mSDsCounter, 0 mSdLazyCounter, 19834 mSolverCounterSat, 2560 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12679.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 22394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.11ms SdHoareTripleChecker+Time, 2560 IncrementalHoareTripleChecker+Valid, 19834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14976.72ms IncrementalHoareTripleChecker+Time [2021-11-02 22:48:00,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 22394 Unknown, 0 Unchecked, 31.11ms Time], IncrementalHoareTripleChecker [2560 Valid, 19834 Invalid, 0 Unknown, 0 Unchecked, 14976.72ms Time] [2021-11-02 22:48:00,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2021-11-02 22:48:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 6069. [2021-11-02 22:48:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6056 states have (on average 1.2569352708058124) internal successors, (7612), 6057 states have internal predecessors, (7612), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:48:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 7628 transitions. [2021-11-02 22:48:00,681 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 7628 transitions. Word has length 173 [2021-11-02 22:48:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:00,681 INFO L470 AbstractCegarLoop]: Abstraction has 6069 states and 7628 transitions. [2021-11-02 22:48:00,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.0) internal successors, (177), 59 states have internal predecessors, (177), 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) [2021-11-02 22:48:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 7628 transitions. [2021-11-02 22:48:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-02 22:48:00,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:48:00,690 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 16, 8, 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] [2021-11-02 22:48:00,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:00,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:00,904 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:00,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:00,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1734023444, now seen corresponding path program 2 times [2021-11-02 22:48:00,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:00,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135275675] [2021-11-02 22:48:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:00,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2021-11-02 22:48:01,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:01,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135275675] [2021-11-02 22:48:01,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135275675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:01,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755651689] [2021-11-02 22:48:01,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:01,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:01,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:48:01,979 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:01,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:48:11,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:48:11,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:48:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2021-11-02 22:48:11,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:48:11,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755651689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:11,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:48:11,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [41] total 42 [2021-11-02 22:48:11,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403882063] [2021-11-02 22:48:11,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:11,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:11,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:11,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:48:11,984 INFO L87 Difference]: Start difference. First operand 6069 states and 7628 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-11-02 22:48:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:18,619 INFO L93 Difference]: Finished difference Result 13922 states and 17292 transitions. [2021-11-02 22:48:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 220 [2021-11-02 22:48:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:18,634 INFO L225 Difference]: With dead ends: 13922 [2021-11-02 22:48:18,634 INFO L226 Difference]: Without dead ends: 7880 [2021-11-02 22:48:18,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 739.29ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:48:18,647 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 330 mSDsluCounter, 3126 mSDsCounter, 0 mSdLazyCounter, 6616 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4991.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 6616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.97ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5829.41ms IncrementalHoareTripleChecker+Time [2021-11-02 22:48:18,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 27 Invalid, 6616 Unknown, 0 Unchecked, 7.97ms Time], IncrementalHoareTripleChecker [0 Valid, 6616 Invalid, 0 Unknown, 0 Unchecked, 5829.41ms Time] [2021-11-02 22:48:18,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7880 states. [2021-11-02 22:48:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7880 to 6069. [2021-11-02 22:48:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6056 states have (on average 1.2566050198150593) internal successors, (7610), 6057 states have internal predecessors, (7610), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:48:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 7626 transitions. [2021-11-02 22:48:19,221 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 7626 transitions. Word has length 220 [2021-11-02 22:48:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:19,222 INFO L470 AbstractCegarLoop]: Abstraction has 6069 states and 7626 transitions. [2021-11-02 22:48:19,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-11-02 22:48:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 7626 transitions. [2021-11-02 22:48:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-02 22:48:19,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:48:19,232 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 16, 8, 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] [2021-11-02 22:48:19,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:19,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:48:19,435 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -439160352, now seen corresponding path program 1 times [2021-11-02 22:48:19,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:19,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220325581] [2021-11-02 22:48:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:19,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2021-11-02 22:48:20,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:20,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220325581] [2021-11-02 22:48:20,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220325581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:20,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956822746] [2021-11-02 22:48:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:20,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:48:20,533 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:20,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:48:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 3101 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:48:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2021-11-02 22:48:23,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:48:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 920 trivial. 0 not checked. [2021-11-02 22:48:25,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956822746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:48:25,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:48:25,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 119 [2021-11-02 22:48:25,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263256698] [2021-11-02 22:48:25,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-02 22:48:25,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:25,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-02 22:48:25,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2021-11-02 22:48:25,877 INFO L87 Difference]: Start difference. First operand 6069 states and 7626 transitions. Second operand has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 119 states have internal predecessors, (237), 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) [2021-11-02 22:48:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:46,674 INFO L93 Difference]: Finished difference Result 14431 states and 19864 transitions. [2021-11-02 22:48:46,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-02 22:48:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 119 states have internal predecessors, (237), 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 220 [2021-11-02 22:48:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:46,686 INFO L225 Difference]: With dead ends: 14431 [2021-11-02 22:48:46,687 INFO L226 Difference]: Without dead ends: 8389 [2021-11-02 22:48:46,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4712.11ms TimeCoverageRelationStatistics Valid=6280, Invalid=7762, Unknown=0, NotChecked=0, Total=14042 [2021-11-02 22:48:46,703 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12608 mSDsCounter, 0 mSdLazyCounter, 17383 mSolverCounterSat, 6498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14296.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 23881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.11ms SdHoareTripleChecker+Time, 6498 IncrementalHoareTripleChecker+Valid, 17383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16745.99ms IncrementalHoareTripleChecker+Time [2021-11-02 22:48:46,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 23881 Unknown, 0 Unchecked, 37.11ms Time], IncrementalHoareTripleChecker [6498 Valid, 17383 Invalid, 0 Unknown, 0 Unchecked, 16745.99ms Time] [2021-11-02 22:48:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8389 states. [2021-11-02 22:48:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8389 to 8389. [2021-11-02 22:48:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8389 states, 8376 states have (on average 1.1855300859598854) internal successors, (9930), 8377 states have internal predecessors, (9930), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:48:47,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8389 states to 8389 states and 9946 transitions. [2021-11-02 22:48:47,520 INFO L78 Accepts]: Start accepts. Automaton has 8389 states and 9946 transitions. Word has length 220 [2021-11-02 22:48:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:47,521 INFO L470 AbstractCegarLoop]: Abstraction has 8389 states and 9946 transitions. [2021-11-02 22:48:47,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 119 states have internal predecessors, (237), 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) [2021-11-02 22:48:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8389 states and 9946 transitions. [2021-11-02 22:48:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-02 22:48:47,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:48:47,532 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 16, 8, 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] [2021-11-02 22:48:47,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:47,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:48:47,741 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:48:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:47,742 INFO L85 PathProgramCache]: Analyzing trace with hash 940658400, now seen corresponding path program 2 times [2021-11-02 22:48:47,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:47,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417351618] [2021-11-02 22:48:47,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:47,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6341 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2021-11-02 22:48:50,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:50,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417351618] [2021-11-02 22:48:50,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417351618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:50,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045169140] [2021-11-02 22:48:50,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:50,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:50,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:48:50,693 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:50,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:48:57,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:48:57,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:57,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 2352 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:48:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6341 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6341 trivial. 0 not checked. [2021-11-02 22:48:57,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:48:57,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045169140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:57,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:48:57,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [81] total 83 [2021-11-02 22:48:57,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605321190] [2021-11-02 22:48:57,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:48:57,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:48:57,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3244, Invalid=3562, Unknown=0, NotChecked=0, Total=6806 [2021-11-02 22:48:57,707 INFO L87 Difference]: Start difference. First operand 8389 states and 9946 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2021-11-02 22:49:12,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:12,003 INFO L93 Difference]: Finished difference Result 32664 states and 37921 transitions. [2021-11-02 22:49:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:49:12,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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 300 [2021-11-02 22:49:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:12,044 INFO L225 Difference]: With dead ends: 32664 [2021-11-02 22:49:12,045 INFO L226 Difference]: Without dead ends: 24302 [2021-11-02 22:49:12,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2574.18ms TimeCoverageRelationStatistics Valid=3248, Invalid=3724, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 22:49:12,070 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2373 mSDsluCounter, 7267 mSDsCounter, 0 mSdLazyCounter, 11185 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9250.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 11214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.95ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 11185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10863.32ms IncrementalHoareTripleChecker+Time [2021-11-02 22:49:12,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2375 Valid, 45 Invalid, 11214 Unknown, 0 Unchecked, 24.95ms Time], IncrementalHoareTripleChecker [29 Valid, 11185 Invalid, 0 Unknown, 0 Unchecked, 10863.32ms Time] [2021-11-02 22:49:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24302 states. [2021-11-02 22:49:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24302 to 4971. [2021-11-02 22:49:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4971 states, 4960 states have (on average 1.2195564516129032) internal successors, (6049), 4961 states have internal predecessors, (6049), 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) [2021-11-02 22:49:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4971 states to 4971 states and 6061 transitions. [2021-11-02 22:49:12,857 INFO L78 Accepts]: Start accepts. Automaton has 4971 states and 6061 transitions. Word has length 300 [2021-11-02 22:49:12,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:12,857 INFO L470 AbstractCegarLoop]: Abstraction has 4971 states and 6061 transitions. [2021-11-02 22:49:12,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2021-11-02 22:49:12,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4971 states and 6061 transitions. [2021-11-02 22:49:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-11-02 22:49:12,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:49:12,864 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 16, 8, 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] [2021-11-02 22:49:12,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:13,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:49:13,069 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:49:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1956616872, now seen corresponding path program 1 times [2021-11-02 22:49:13,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:13,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466692535] [2021-11-02 22:49:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:13,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6341 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2021-11-02 22:49:16,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:16,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466692535] [2021-11-02 22:49:16,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466692535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:16,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185444520] [2021-11-02 22:49:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:16,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:16,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:49:16,517 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:16,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:49:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 3648 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-02 22:49:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6341 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2021-11-02 22:49:24,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:49:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6341 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 3260 trivial. 0 not checked. [2021-11-02 22:49:32,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185444520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:49:32,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:49:32,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 239 [2021-11-02 22:49:32,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460576861] [2021-11-02 22:49:32,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 239 states [2021-11-02 22:49:32,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:32,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 239 interpolants. [2021-11-02 22:49:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21578, Invalid=35304, Unknown=0, NotChecked=0, Total=56882 [2021-11-02 22:49:32,262 INFO L87 Difference]: Start difference. First operand 4971 states and 6061 transitions. Second operand has 239 states, 239 states have (on average 1.502092050209205) internal successors, (359), 239 states have internal predecessors, (359), 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) [2021-11-02 22:50:18,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:18,707 INFO L93 Difference]: Finished difference Result 10437 states and 13138 transitions. [2021-11-02 22:50:18,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-11-02 22:50:18,708 INFO L78 Accepts]: Start accepts. Automaton has has 239 states, 239 states have (on average 1.502092050209205) internal successors, (359), 239 states have internal predecessors, (359), 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 302 [2021-11-02 22:50:18,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:18,717 INFO L225 Difference]: With dead ends: 10437 [2021-11-02 22:50:18,717 INFO L226 Difference]: Without dead ends: 5493 [2021-11-02 22:50:18,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9652 ImplicationChecksByTransitivity, 16421.24ms TimeCoverageRelationStatistics Valid=21578, Invalid=35304, Unknown=0, NotChecked=0, Total=56882 [2021-11-02 22:50:18,731 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 31520 mSDsCounter, 0 mSdLazyCounter, 37294 mSolverCounterSat, 9075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25807.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 46369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 94.59ms SdHoareTripleChecker+Time, 9075 IncrementalHoareTripleChecker+Valid, 37294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30544.46ms IncrementalHoareTripleChecker+Time [2021-11-02 22:50:18,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 46369 Unknown, 0 Unchecked, 94.59ms Time], IncrementalHoareTripleChecker [9075 Valid, 37294 Invalid, 0 Unknown, 0 Unchecked, 30544.46ms Time] [2021-11-02 22:50:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2021-11-02 22:50:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 5493. [2021-11-02 22:50:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5493 states, 5482 states have (on average 1.1986501276906238) internal successors, (6571), 5483 states have internal predecessors, (6571), 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) [2021-11-02 22:50:19,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 6583 transitions. [2021-11-02 22:50:19,558 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 6583 transitions. Word has length 302 [2021-11-02 22:50:19,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:19,558 INFO L470 AbstractCegarLoop]: Abstraction has 5493 states and 6583 transitions. [2021-11-02 22:50:19,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 239 states, 239 states have (on average 1.502092050209205) internal successors, (359), 239 states have internal predecessors, (359), 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) [2021-11-02 22:50:19,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 6583 transitions. [2021-11-02 22:50:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-11-02 22:50:19,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:50:19,566 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 8, 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] [2021-11-02 22:50:19,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:19,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:50:19,780 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:19,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:19,780 INFO L85 PathProgramCache]: Analyzing trace with hash -684239640, now seen corresponding path program 2 times [2021-11-02 22:50:19,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:19,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971626483] [2021-11-02 22:50:19,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:19,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9491 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:50:20,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:20,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971626483] [2021-11-02 22:50:20,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971626483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:20,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981882445] [2021-11-02 22:50:20,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:50:20,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:20,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:50:20,088 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:20,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:50:24,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:50:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:50:24,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:50:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9491 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9491 trivial. 0 not checked. [2021-11-02 22:50:25,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:50:25,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981882445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:25,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:50:25,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-02 22:50:25,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636985697] [2021-11-02 22:50:25,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:50:25,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:50:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:50:25,422 INFO L87 Difference]: Start difference. First operand 5493 states and 6583 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) [2021-11-02 22:50:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:47,307 INFO L93 Difference]: Finished difference Result 34885 states and 39872 transitions. [2021-11-02 22:50:47,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:50:47,307 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 338 [2021-11-02 22:50:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:47,363 INFO L225 Difference]: With dead ends: 34885 [2021-11-02 22:50:47,364 INFO L226 Difference]: Without dead ends: 29419 [2021-11-02 22:50:47,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 70.74ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:50:47,382 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6875 mSDsluCounter, 12754 mSDsCounter, 0 mSdLazyCounter, 16897 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13588.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6880 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 16921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.46ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 16897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15863.10ms IncrementalHoareTripleChecker+Time [2021-11-02 22:50:47,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6880 Valid, 80 Invalid, 16921 Unknown, 0 Unchecked, 33.46ms Time], IncrementalHoareTripleChecker [24 Valid, 16897 Invalid, 0 Unknown, 0 Unchecked, 15863.10ms Time] [2021-11-02 22:50:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29419 states. [2021-11-02 22:50:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29419 to 5496. [2021-11-02 22:50:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5485 states have (on average 1.1985414767547857) internal successors, (6574), 5486 states have internal predecessors, (6574), 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) [2021-11-02 22:50:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 6586 transitions. [2021-11-02 22:50:48,458 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 6586 transitions. Word has length 338 [2021-11-02 22:50:48,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:48,458 INFO L470 AbstractCegarLoop]: Abstraction has 5496 states and 6586 transitions. [2021-11-02 22:50:48,458 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) [2021-11-02 22:50:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 6586 transitions. [2021-11-02 22:50:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-11-02 22:50:48,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:50:48,466 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 8, 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] [2021-11-02 22:50:48,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:48,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:48,691 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:48,692 INFO L85 PathProgramCache]: Analyzing trace with hash 275082576, now seen corresponding path program 1 times [2021-11-02 22:50:48,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:48,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113247465] [2021-11-02 22:50:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:48,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9491 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:50:49,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:49,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113247465] [2021-11-02 22:50:49,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113247465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:49,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485373462] [2021-11-02 22:50:49,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:49,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:49,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:50:49,016 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:49,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:50:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:49,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 3911 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:50:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9491 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:50:50,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:50:50,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9491 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:50:50,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485373462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:50:50,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:50:50,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-02 22:50:50,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926763617] [2021-11-02 22:50:50,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:50:50,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:50,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:50:50,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:50:50,634 INFO L87 Difference]: Start difference. First operand 5496 states and 6586 transitions. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2021-11-02 22:50:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:59,262 INFO L93 Difference]: Finished difference Result 10973 states and 13156 transitions. [2021-11-02 22:50:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:50:59,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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 344 [2021-11-02 22:50:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:59,270 INFO L225 Difference]: With dead ends: 10973 [2021-11-02 22:50:59,270 INFO L226 Difference]: Without dead ends: 5504 [2021-11-02 22:50:59,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 18.80ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:50:59,277 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 6408 mSDsCounter, 0 mSdLazyCounter, 9598 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6546.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.11ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7672.54ms IncrementalHoareTripleChecker+Time [2021-11-02 22:50:59,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 36 Invalid, 9605 Unknown, 0 Unchecked, 10.11ms Time], IncrementalHoareTripleChecker [7 Valid, 9598 Invalid, 0 Unknown, 0 Unchecked, 7672.54ms Time] [2021-11-02 22:50:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5504 states. [2021-11-02 22:51:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5504 to 5504. [2021-11-02 22:51:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5504 states, 5493 states have (on average 1.1982523211359912) internal successors, (6582), 5494 states have internal predecessors, (6582), 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) [2021-11-02 22:51:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5504 states to 5504 states and 6594 transitions. [2021-11-02 22:51:00,172 INFO L78 Accepts]: Start accepts. Automaton has 5504 states and 6594 transitions. Word has length 344 [2021-11-02 22:51:00,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:00,173 INFO L470 AbstractCegarLoop]: Abstraction has 5504 states and 6594 transitions. [2021-11-02 22:51:00,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 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) [2021-11-02 22:51:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5504 states and 6594 transitions. [2021-11-02 22:51:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-02 22:51:00,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:51:00,179 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 8, 6, 6, 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] [2021-11-02 22:51:00,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:00,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:51:00,395 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:51:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:00,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1112564288, now seen corresponding path program 2 times [2021-11-02 22:51:00,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:00,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577138467] [2021-11-02 22:51:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:00,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9523 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:51:00,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:00,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577138467] [2021-11-02 22:51:00,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577138467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:00,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697801711] [2021-11-02 22:51:00,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:00,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:51:00,716 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:00,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:51:05,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:51:05,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:05,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2466 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:51:05,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9523 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9523 trivial. 0 not checked. [2021-11-02 22:51:06,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:51:06,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697801711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:51:06,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:51:06,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-02 22:51:06,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119865209] [2021-11-02 22:51:06,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:51:06,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:51:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:51:06,571 INFO L87 Difference]: Start difference. First operand 5504 states and 6594 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 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) [2021-11-02 22:51:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:36,390 INFO L93 Difference]: Finished difference Result 37665 states and 42468 transitions. [2021-11-02 22:51:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:51:36,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 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 352 [2021-11-02 22:51:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:36,443 INFO L225 Difference]: With dead ends: 37665 [2021-11-02 22:51:36,444 INFO L226 Difference]: Without dead ends: 32188 [2021-11-02 22:51:36,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 219.45ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:51:36,462 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8501 mSDsluCounter, 20667 mSDsCounter, 0 mSdLazyCounter, 25174 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18339.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8504 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 25291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.07ms SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 25174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21301.23ms IncrementalHoareTripleChecker+Time [2021-11-02 22:51:36,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8504 Valid, 127 Invalid, 25291 Unknown, 0 Unchecked, 47.07ms Time], IncrementalHoareTripleChecker [117 Valid, 25174 Invalid, 0 Unknown, 0 Unchecked, 21301.23ms Time] [2021-11-02 22:51:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-11-02 22:51:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 5549. [2021-11-02 22:51:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5538 states have (on average 1.1989888046226074) internal successors, (6640), 5539 states have internal predecessors, (6640), 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) [2021-11-02 22:51:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 6652 transitions. [2021-11-02 22:51:37,729 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 6652 transitions. Word has length 352 [2021-11-02 22:51:37,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:37,729 INFO L470 AbstractCegarLoop]: Abstraction has 5549 states and 6652 transitions. [2021-11-02 22:51:37,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 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) [2021-11-02 22:51:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 6652 transitions. [2021-11-02 22:51:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-02 22:51:37,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:51:37,736 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 8, 6, 6, 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] [2021-11-02 22:51:37,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-02 22:51:37,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:51:37,950 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:51:37,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:37,950 INFO L85 PathProgramCache]: Analyzing trace with hash 5247312, now seen corresponding path program 1 times [2021-11-02 22:51:37,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:37,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882831005] [2021-11-02 22:51:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:37,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9523 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:51:38,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:38,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882831005] [2021-11-02 22:51:38,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882831005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:38,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254770100] [2021-11-02 22:51:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:38,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:38,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:51:38,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:38,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:51:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 4029 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:51:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9523 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:51:39,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:51:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9523 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:51:40,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254770100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:51:40,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:51:40,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-11-02 22:51:40,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778862643] [2021-11-02 22:51:40,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:51:40,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:40,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:51:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:51:40,179 INFO L87 Difference]: Start difference. First operand 5549 states and 6652 transitions. Second operand has 17 states, 17 states have (on average 9.823529411764707) internal successors, (167), 17 states have internal predecessors, (167), 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) [2021-11-02 22:51:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:54,323 INFO L93 Difference]: Finished difference Result 11087 states and 13300 transitions. [2021-11-02 22:51:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:51:54,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.823529411764707) internal successors, (167), 17 states have internal predecessors, (167), 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 364 [2021-11-02 22:51:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:54,330 INFO L225 Difference]: With dead ends: 11087 [2021-11-02 22:51:54,331 INFO L226 Difference]: Without dead ends: 5565 [2021-11-02 22:51:54,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 88.07ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:51:54,338 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 12816 mSDsCounter, 0 mSdLazyCounter, 16000 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11037.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 16010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.93ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12883.28ms IncrementalHoareTripleChecker+Time [2021-11-02 22:51:54,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 60 Invalid, 16010 Unknown, 0 Unchecked, 20.93ms Time], IncrementalHoareTripleChecker [10 Valid, 16000 Invalid, 0 Unknown, 0 Unchecked, 12883.28ms Time] [2021-11-02 22:51:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5565 states. [2021-11-02 22:51:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5565 to 5565. [2021-11-02 22:51:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5565 states, 5554 states have (on average 1.1984155563557797) internal successors, (6656), 5555 states have internal predecessors, (6656), 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) [2021-11-02 22:51:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 6668 transitions. [2021-11-02 22:51:55,389 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 6668 transitions. Word has length 364 [2021-11-02 22:51:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:55,390 INFO L470 AbstractCegarLoop]: Abstraction has 5565 states and 6668 transitions. [2021-11-02 22:51:55,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.823529411764707) internal successors, (167), 17 states have internal predecessors, (167), 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) [2021-11-02 22:51:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 6668 transitions. [2021-11-02 22:51:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-02 22:51:55,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:51:55,397 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 14, 14, 8, 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] [2021-11-02 22:51:55,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-02 22:51:55,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-02 22:51:55,616 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:51:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1388533200, now seen corresponding path program 2 times [2021-11-02 22:51:55,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:55,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386644331] [2021-11-02 22:51:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:55,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9683 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 9487 trivial. 0 not checked. [2021-11-02 22:51:56,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:56,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386644331] [2021-11-02 22:51:56,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386644331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:56,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402587337] [2021-11-02 22:51:56,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:56,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:56,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:51:56,082 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:56,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process Killed by 15