./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.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 f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 11:56:40,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 11:56:40,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 11:56:40,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 11:56:40,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 11:56:40,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 11:56:40,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 11:56:40,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 11:56:40,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 11:56:40,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 11:56:40,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 11:56:40,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 11:56:40,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 11:56:40,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 11:56:40,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 11:56:40,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 11:56:40,749 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 11:56:40,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 11:56:40,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 11:56:40,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 11:56:40,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 11:56:40,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 11:56:40,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 11:56:40,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 11:56:40,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 11:56:40,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 11:56:40,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 11:56:40,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 11:56:40,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 11:56:40,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 11:56:40,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 11:56:40,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 11:56:40,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 11:56:40,769 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 11:56:40,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 11:56:40,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 11:56:40,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 11:56:40,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 11:56:40,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 11:56:40,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 11:56:40,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 11:56:40,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 11:56:40,798 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 11:56:40,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 11:56:40,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 11:56:40,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 11:56:40,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 11:56:40,800 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 11:56:40,801 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 11:56:40,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 11:56:40,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 11:56:40,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 11:56:40,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 11:56:40,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 11:56:40,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 11:56:40,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 11:56:40,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 11:56:40,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 11:56:40,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 11:56:40,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 11:56:40,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 11:56:40,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 11:56:40,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 11:56:40,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 11:56:40,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 11:56:40,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 11:56:40,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 11:56:40,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 11:56:40,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 11:56:40,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 11:56:40,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 11:56:40,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f51fd7a7e803b337407ebecb084bc416ae9c8b7a3d33ff72a0e0702d21471e83 [2021-11-06 11:56:41,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 11:56:41,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 11:56:41,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 11:56:41,038 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 11:56:41,039 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 11:56:41,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-06 11:56:41,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fa5992a4/ca4b0dbaf4a94649b0e2ef7673a7b1e0/FLAGcda027fa7 [2021-11-06 11:56:41,624 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 11:56:41,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-06 11:56:41,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fa5992a4/ca4b0dbaf4a94649b0e2ef7673a7b1e0/FLAGcda027fa7 [2021-11-06 11:56:41,849 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fa5992a4/ca4b0dbaf4a94649b0e2ef7673a7b1e0 [2021-11-06 11:56:41,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 11:56:41,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 11:56:41,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 11:56:41,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 11:56:41,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 11:56:41,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:56:41" (1/1) ... [2021-11-06 11:56:41,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652663f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:41, skipping insertion in model container [2021-11-06 11:56:41,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:56:41" (1/1) ... [2021-11-06 11:56:41,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 11:56:41,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 11:56:43,003 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-06 11:56:43,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 11:56:43,058 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 11:56:43,309 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2021-11-06 11:56:43,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 11:56:43,485 INFO L208 MainTranslator]: Completed translation [2021-11-06 11:56:43,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43 WrapperNode [2021-11-06 11:56:43,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 11:56:43,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 11:56:43,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 11:56:43,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 11:56:43,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,575 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 11:56:43,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 11:56:43,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 11:56:43,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 11:56:43,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 11:56:43,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 11:56:43,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 11:56:43,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 11:56:43,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (1/1) ... [2021-11-06 11:56:43,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 11:56:43,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:56:43,944 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 11:56:43,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 11:56:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 11:56:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 11:56:43,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 11:56:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 11:56:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 11:56:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 11:56:43,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 11:56:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 11:56:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 11:56:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 11:56:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 11:56:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 11:56:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 11:56:43,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 11:56:43,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 11:56:44,401 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-06 11:56:44,417 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-06 11:56:44,431 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-06 11:56:44,432 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-06 11:56:44,434 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-06 11:56:44,434 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-06 11:56:44,449 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-06 11:56:46,991 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##644: assume !false; [2021-11-06 11:56:46,991 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##643: assume false; [2021-11-06 11:56:46,991 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##320: assume false; [2021-11-06 11:56:46,991 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##321: assume !false; [2021-11-06 11:56:46,991 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##375: assume !false; [2021-11-06 11:56:46,991 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##374: assume false; [2021-11-06 11:56:46,991 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##381: assume !false; [2021-11-06 11:56:46,992 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##380: assume false; [2021-11-06 11:56:46,992 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##335: assume !false; [2021-11-06 11:56:46,992 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##334: assume false; [2021-11-06 11:56:46,992 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2021-11-06 11:56:46,992 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2021-11-06 11:56:46,992 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##164: assume !false;call ULTIMATE.dealloc(fst_ioctl_~#wrthdr~0.base, fst_ioctl_~#wrthdr~0.offset);havoc fst_ioctl_~#wrthdr~0.base, fst_ioctl_~#wrthdr~0.offset;call ULTIMATE.dealloc(fst_ioctl_~#info~0.base, fst_ioctl_~#info~0.offset);havoc fst_ioctl_~#info~0.base, fst_ioctl_~#info~0.offset; [2021-11-06 11:56:46,992 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume false; [2021-11-06 11:56:47,002 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 11:56:47,002 INFO L299 CfgBuilder]: Removed 929 assume(true) statements. [2021-11-06 11:56:47,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:56:47 BoogieIcfgContainer [2021-11-06 11:56:47,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 11:56:47,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 11:56:47,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 11:56:47,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 11:56:47,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:56:41" (1/3) ... [2021-11-06 11:56:47,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf4eabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:56:47, skipping insertion in model container [2021-11-06 11:56:47,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:56:43" (2/3) ... [2021-11-06 11:56:47,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf4eabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:56:47, skipping insertion in model container [2021-11-06 11:56:47,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:56:47" (3/3) ... [2021-11-06 11:56:47,011 INFO L111 eAbstractionObserver]: Analyzing ICFG module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2021-11-06 11:56:47,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 11:56:47,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-06 11:56:47,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 11:56:47,049 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 11:56:47,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-06 11:56:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 828 states, 824 states have (on average 1.3361650485436893) internal successors, (1101), 827 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-06 11:56:47,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:47,072 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:47,072 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:47,076 INFO L85 PathProgramCache]: Analyzing trace with hash -113753420, now seen corresponding path program 1 times [2021-11-06 11:56:47,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:47,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535140009] [2021-11-06 11:56:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:47,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:47,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:47,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535140009] [2021-11-06 11:56:47,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535140009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:47,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:56:47,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 11:56:47,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583310679] [2021-11-06 11:56:47,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 11:56:47,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 11:56:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 11:56:47,445 INFO L87 Difference]: Start difference. First operand has 828 states, 824 states have (on average 1.3361650485436893) internal successors, (1101), 827 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:47,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:47,543 INFO L93 Difference]: Finished difference Result 1653 states and 2199 transitions. [2021-11-06 11:56:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 11:56:47,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-11-06 11:56:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:47,561 INFO L225 Difference]: With dead ends: 1653 [2021-11-06 11:56:47,561 INFO L226 Difference]: Without dead ends: 826 [2021-11-06 11:56:47,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 11:56:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-11-06 11:56:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 825. [2021-11-06 11:56:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 822 states have (on average 1.3248175182481752) internal successors, (1089), 824 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1089 transitions. [2021-11-06 11:56:47,638 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1089 transitions. Word has length 12 [2021-11-06 11:56:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:47,639 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1089 transitions. [2021-11-06 11:56:47,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1089 transitions. [2021-11-06 11:56:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-06 11:56:47,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:47,640 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:47,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 11:56:47,641 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:47,643 INFO L85 PathProgramCache]: Analyzing trace with hash -267009736, now seen corresponding path program 1 times [2021-11-06 11:56:47,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:47,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139154226] [2021-11-06 11:56:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:47,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:47,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:47,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139154226] [2021-11-06 11:56:47,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139154226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:47,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557106802] [2021-11-06 11:56:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:47,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:47,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:56:47,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:56:47,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 11:56:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 11:56:48,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:56:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-06 11:56:48,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557106802] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:48,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:56:48,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-06 11:56:48,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667218924] [2021-11-06 11:56:48,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 11:56:48,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 11:56:48,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:56:48,259 INFO L87 Difference]: Start difference. First operand 825 states and 1089 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:48,296 INFO L93 Difference]: Finished difference Result 2447 states and 3236 transitions. [2021-11-06 11:56:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 11:56:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 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 14 [2021-11-06 11:56:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:48,302 INFO L225 Difference]: With dead ends: 2447 [2021-11-06 11:56:48,302 INFO L226 Difference]: Without dead ends: 1632 [2021-11-06 11:56:48,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:56:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-11-06 11:56:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1628. [2021-11-06 11:56:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1625 states have (on average 1.323076923076923) internal successors, (2150), 1627 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2150 transitions. [2021-11-06 11:56:48,352 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2150 transitions. Word has length 14 [2021-11-06 11:56:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:48,352 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2150 transitions. [2021-11-06 11:56:48,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2150 transitions. [2021-11-06 11:56:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-06 11:56:48,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:48,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:48,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-06 11:56:48,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:48,575 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:48,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:48,576 INFO L85 PathProgramCache]: Analyzing trace with hash -19483246, now seen corresponding path program 1 times [2021-11-06 11:56:48,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:48,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688326161] [2021-11-06 11:56:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:48,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:48,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:48,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688326161] [2021-11-06 11:56:48,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688326161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:48,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227188664] [2021-11-06 11:56:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:48,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:56:48,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:56:48,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 11:56:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-06 11:56:49,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:56:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:49,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227188664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:49,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:56:49,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 11:56:49,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548364969] [2021-11-06 11:56:49,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:56:49,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:49,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:56:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:56:49,148 INFO L87 Difference]: Start difference. First operand 1628 states and 2150 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:49,187 INFO L93 Difference]: Finished difference Result 3253 states and 4297 transitions. [2021-11-06 11:56:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:56:49,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 29 [2021-11-06 11:56:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:49,192 INFO L225 Difference]: With dead ends: 3253 [2021-11-06 11:56:49,192 INFO L226 Difference]: Without dead ends: 1631 [2021-11-06 11:56:49,194 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:56:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-11-06 11:56:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1630. [2021-11-06 11:56:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1627 states have (on average 1.322679778733866) internal successors, (2152), 1629 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2152 transitions. [2021-11-06 11:56:49,224 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2152 transitions. Word has length 29 [2021-11-06 11:56:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:49,224 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 2152 transitions. [2021-11-06 11:56:49,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2152 transitions. [2021-11-06 11:56:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-06 11:56:49,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:49,226 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:49,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-06 11:56:49,451 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,SelfDestructingSolverStorable2 [2021-11-06 11:56:49,452 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash 639471502, now seen corresponding path program 2 times [2021-11-06 11:56:49,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:49,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446590240] [2021-11-06 11:56:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:49,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:56:49,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:49,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446590240] [2021-11-06 11:56:49,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446590240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:49,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:56:49,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:56:49,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240675843] [2021-11-06 11:56:49,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:56:49,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:56:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:56:49,587 INFO L87 Difference]: Start difference. First operand 1630 states and 2152 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:49,697 INFO L93 Difference]: Finished difference Result 5250 states and 6968 transitions. [2021-11-06 11:56:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:56:49,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 [2021-11-06 11:56:49,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:49,709 INFO L225 Difference]: With dead ends: 5250 [2021-11-06 11:56:49,709 INFO L226 Difference]: Without dead ends: 3634 [2021-11-06 11:56:49,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:56:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2021-11-06 11:56:49,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 1533. [2021-11-06 11:56:49,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1530 states have (on average 1.3261437908496732) internal successors, (2029), 1532 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2029 transitions. [2021-11-06 11:56:49,761 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2029 transitions. Word has length 31 [2021-11-06 11:56:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:49,761 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 2029 transitions. [2021-11-06 11:56:49,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2029 transitions. [2021-11-06 11:56:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-06 11:56:49,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:49,765 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:49,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 11:56:49,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:49,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1341178206, now seen corresponding path program 1 times [2021-11-06 11:56:49,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:49,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135574882] [2021-11-06 11:56:49,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:49,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:56:49,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:49,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135574882] [2021-11-06 11:56:49,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135574882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:49,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:56:49,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:56:49,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700241187] [2021-11-06 11:56:49,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:56:49,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:49,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:56:49,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:56:49,856 INFO L87 Difference]: Start difference. First operand 1533 states and 2029 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:49,926 INFO L93 Difference]: Finished difference Result 3053 states and 4045 transitions. [2021-11-06 11:56:49,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:56:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 32 [2021-11-06 11:56:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:49,931 INFO L225 Difference]: With dead ends: 3053 [2021-11-06 11:56:49,932 INFO L226 Difference]: Without dead ends: 2237 [2021-11-06 11:56:49,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:56:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-11-06 11:56:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1533. [2021-11-06 11:56:49,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1530 states have (on average 1.3254901960784313) internal successors, (2028), 1532 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2028 transitions. [2021-11-06 11:56:49,963 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2028 transitions. Word has length 32 [2021-11-06 11:56:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:49,963 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 2028 transitions. [2021-11-06 11:56:49,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2028 transitions. [2021-11-06 11:56:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-06 11:56:49,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:49,964 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:49,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 11:56:49,965 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:49,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1826872972, now seen corresponding path program 1 times [2021-11-06 11:56:49,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:49,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369294470] [2021-11-06 11:56:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:49,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:56:50,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:50,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369294470] [2021-11-06 11:56:50,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369294470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:50,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:56:50,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 11:56:50,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204300552] [2021-11-06 11:56:50,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:56:50,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:50,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:56:50,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:56:50,037 INFO L87 Difference]: Start difference. First operand 1533 states and 2028 transitions. Second operand has 4 states, 4 states have (on average 7.75) 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) [2021-11-06 11:56:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:50,334 INFO L93 Difference]: Finished difference Result 2349 states and 3104 transitions. [2021-11-06 11:56:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:56:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) 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 33 [2021-11-06 11:56:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:50,340 INFO L225 Difference]: With dead ends: 2349 [2021-11-06 11:56:50,340 INFO L226 Difference]: Without dead ends: 2345 [2021-11-06 11:56:50,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:56:50,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-11-06 11:56:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2339. [2021-11-06 11:56:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2336 states have (on average 1.3253424657534247) internal successors, (3096), 2338 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 3096 transitions. [2021-11-06 11:56:50,389 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 3096 transitions. Word has length 33 [2021-11-06 11:56:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:50,391 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 3096 transitions. [2021-11-06 11:56:50,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) 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) [2021-11-06 11:56:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 3096 transitions. [2021-11-06 11:56:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-06 11:56:50,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:50,393 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:50,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 11:56:50,394 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1432552119, now seen corresponding path program 1 times [2021-11-06 11:56:50,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:50,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449180320] [2021-11-06 11:56:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:50,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:50,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:50,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449180320] [2021-11-06 11:56:50,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449180320] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:50,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967881995] [2021-11-06 11:56:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:50,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:50,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:56:50,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:56:50,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 11:56:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:50,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-06 11:56:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:56:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:51,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967881995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:51,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:56:51,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 11:56:51,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751885401] [2021-11-06 11:56:51,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 11:56:51,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 11:56:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:56:51,018 INFO L87 Difference]: Start difference. First operand 2339 states and 3096 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:51,082 INFO L93 Difference]: Finished difference Result 4673 states and 6187 transitions. [2021-11-06 11:56:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:56:51,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 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 37 [2021-11-06 11:56:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:51,090 INFO L225 Difference]: With dead ends: 4673 [2021-11-06 11:56:51,090 INFO L226 Difference]: Without dead ends: 2342 [2021-11-06 11:56:51,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-06 11:56:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-11-06 11:56:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2341. [2021-11-06 11:56:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 2338 states have (on average 1.3250641573994868) internal successors, (3098), 2340 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3098 transitions. [2021-11-06 11:56:51,137 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3098 transitions. Word has length 37 [2021-11-06 11:56:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:51,137 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 3098 transitions. [2021-11-06 11:56:51,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3098 transitions. [2021-11-06 11:56:51,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-06 11:56:51,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:51,138 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:51,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 11:56:51,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:51,351 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash -870440781, now seen corresponding path program 2 times [2021-11-06 11:56:51,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:51,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725299535] [2021-11-06 11:56:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:51,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:51,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:51,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725299535] [2021-11-06 11:56:51,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725299535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:51,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658556732] [2021-11-06 11:56:51,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 11:56:51,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:51,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:56:51,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:56:51,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 11:56:52,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 11:56:52,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:56:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 11:56:52,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:56:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 11:56:52,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658556732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:52,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:56:52,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-06 11:56:52,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415566000] [2021-11-06 11:56:52,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:56:52,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:56:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:56:52,620 INFO L87 Difference]: Start difference. First operand 2341 states and 3098 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:52,910 INFO L93 Difference]: Finished difference Result 6063 states and 8035 transitions. [2021-11-06 11:56:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 11:56:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 39 [2021-11-06 11:56:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:52,921 INFO L225 Difference]: With dead ends: 6063 [2021-11-06 11:56:52,921 INFO L226 Difference]: Without dead ends: 3738 [2021-11-06 11:56:52,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-06 11:56:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2021-11-06 11:56:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3034. [2021-11-06 11:56:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3031 states have (on average 1.324315407456285) internal successors, (4014), 3033 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4014 transitions. [2021-11-06 11:56:53,084 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4014 transitions. Word has length 39 [2021-11-06 11:56:53,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:53,084 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4014 transitions. [2021-11-06 11:56:53,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:53,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4014 transitions. [2021-11-06 11:56:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-06 11:56:53,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:53,086 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:53,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-06 11:56:53,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:53,307 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash 679042198, now seen corresponding path program 1 times [2021-11-06 11:56:53,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:53,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230408891] [2021-11-06 11:56:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:53,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 11:56:53,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:53,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230408891] [2021-11-06 11:56:53,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230408891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:53,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:56:53,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-06 11:56:53,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415541267] [2021-11-06 11:56:53,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 11:56:53,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 11:56:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:56:53,377 INFO L87 Difference]: Start difference. First operand 3034 states and 4014 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:53,845 INFO L93 Difference]: Finished difference Result 11174 states and 14876 transitions. [2021-11-06 11:56:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:56:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 40 [2021-11-06 11:56:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:53,867 INFO L225 Difference]: With dead ends: 11174 [2021-11-06 11:56:53,867 INFO L226 Difference]: Without dead ends: 8156 [2021-11-06 11:56:53,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:56:53,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-11-06 11:56:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 8114. [2021-11-06 11:56:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8114 states, 8111 states have (on average 1.3327579829860683) internal successors, (10810), 8113 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8114 states to 8114 states and 10810 transitions. [2021-11-06 11:56:54,147 INFO L78 Accepts]: Start accepts. Automaton has 8114 states and 10810 transitions. Word has length 40 [2021-11-06 11:56:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:54,151 INFO L470 AbstractCegarLoop]: Abstraction has 8114 states and 10810 transitions. [2021-11-06 11:56:54,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8114 states and 10810 transitions. [2021-11-06 11:56:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-06 11:56:54,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:54,153 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:54,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 11:56:54,153 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1277116664, now seen corresponding path program 1 times [2021-11-06 11:56:54,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:54,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751848554] [2021-11-06 11:56:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:54,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:54,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:54,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751848554] [2021-11-06 11:56:54,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751848554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:54,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722255412] [2021-11-06 11:56:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:54,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:56:54,261 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:56:54,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 11:56:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:54,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-06 11:56:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:56:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:54,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722255412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:54,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:56:54,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-06 11:56:54,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426862724] [2021-11-06 11:56:54,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 11:56:54,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 11:56:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:56:54,732 INFO L87 Difference]: Start difference. First operand 8114 states and 10810 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:55,024 INFO L93 Difference]: Finished difference Result 16221 states and 21613 transitions. [2021-11-06 11:56:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 11:56:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 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 41 [2021-11-06 11:56:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:55,051 INFO L225 Difference]: With dead ends: 16221 [2021-11-06 11:56:55,051 INFO L226 Difference]: Without dead ends: 8117 [2021-11-06 11:56:55,063 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-06 11:56:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-11-06 11:56:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 8116. [2021-11-06 11:56:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8116 states, 8113 states have (on average 1.3326759521755207) internal successors, (10812), 8115 states have internal predecessors, (10812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8116 states to 8116 states and 10812 transitions. [2021-11-06 11:56:55,318 INFO L78 Accepts]: Start accepts. Automaton has 8116 states and 10812 transitions. Word has length 41 [2021-11-06 11:56:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:55,318 INFO L470 AbstractCegarLoop]: Abstraction has 8116 states and 10812 transitions. [2021-11-06 11:56:55,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8116 states and 10812 transitions. [2021-11-06 11:56:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-06 11:56:55,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:55,320 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:55,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 11:56:55,534 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,SelfDestructingSolverStorable9 [2021-11-06 11:56:55,534 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:55,535 INFO L85 PathProgramCache]: Analyzing trace with hash -73105660, now seen corresponding path program 2 times [2021-11-06 11:56:55,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:55,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892170726] [2021-11-06 11:56:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:55,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 11:56:55,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:55,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892170726] [2021-11-06 11:56:55,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892170726] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:55,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534801146] [2021-11-06 11:56:55,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 11:56:55,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:56:55,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:56:55,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 11:56:56,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 11:56:56,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:56:56,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 11:56:56,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:56:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 11:56:56,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534801146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:56,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 11:56:56,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-06 11:56:56,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353272960] [2021-11-06 11:56:56,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:56:56,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:56:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:56:56,228 INFO L87 Difference]: Start difference. First operand 8116 states and 10812 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:56,999 INFO L93 Difference]: Finished difference Result 16330 states and 21756 transitions. [2021-11-06 11:56:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:56:57,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 43 [2021-11-06 11:56:57,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:57,032 INFO L225 Difference]: With dead ends: 16330 [2021-11-06 11:56:57,032 INFO L226 Difference]: Without dead ends: 14242 [2021-11-06 11:56:57,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:56:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14242 states. [2021-11-06 11:56:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14242 to 14126. [2021-11-06 11:56:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14126 states, 14123 states have (on average 1.3332153225235432) internal successors, (18829), 14125 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14126 states to 14126 states and 18829 transitions. [2021-11-06 11:56:57,607 INFO L78 Accepts]: Start accepts. Automaton has 14126 states and 18829 transitions. Word has length 43 [2021-11-06 11:56:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:57,608 INFO L470 AbstractCegarLoop]: Abstraction has 14126 states and 18829 transitions. [2021-11-06 11:56:57,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:57,608 INFO L276 IsEmpty]: Start isEmpty. Operand 14126 states and 18829 transitions. [2021-11-06 11:56:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-06 11:56:57,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:57,610 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 11:56:57,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-06 11:56:57,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:57,830 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:57,830 INFO L85 PathProgramCache]: Analyzing trace with hash -535842288, now seen corresponding path program 1 times [2021-11-06 11:56:57,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:57,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20152874] [2021-11-06 11:56:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:57,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 11:56:57,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:57,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20152874] [2021-11-06 11:56:57,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20152874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:56:57,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:56:57,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:56:57,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124947891] [2021-11-06 11:56:57,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:56:57,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:57,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:56:57,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:56:57,900 INFO L87 Difference]: Start difference. First operand 14126 states and 18829 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:58,393 INFO L93 Difference]: Finished difference Result 22934 states and 30564 transitions. [2021-11-06 11:56:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 11:56:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 44 [2021-11-06 11:56:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:58,432 INFO L225 Difference]: With dead ends: 22934 [2021-11-06 11:56:58,433 INFO L226 Difference]: Without dead ends: 22930 [2021-11-06 11:56:58,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:56:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22930 states. [2021-11-06 11:56:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22930 to 14134. [2021-11-06 11:56:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14134 states, 14131 states have (on average 1.3330266789328427) internal successors, (18837), 14133 states have internal predecessors, (18837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14134 states to 14134 states and 18837 transitions. [2021-11-06 11:56:58,935 INFO L78 Accepts]: Start accepts. Automaton has 14134 states and 18837 transitions. Word has length 44 [2021-11-06 11:56:58,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:58,937 INFO L470 AbstractCegarLoop]: Abstraction has 14134 states and 18837 transitions. [2021-11-06 11:56:58,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:58,937 INFO L276 IsEmpty]: Start isEmpty. Operand 14134 states and 18837 transitions. [2021-11-06 11:56:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-06 11:56:58,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:58,939 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-11-06 11:56:58,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 11:56:58,939 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:56:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:56:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1065198724, now seen corresponding path program 1 times [2021-11-06 11:56:58,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:56:58,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739739716] [2021-11-06 11:56:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:58,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:56:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-06 11:56:59,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:56:59,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739739716] [2021-11-06 11:56:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739739716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:59,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194338128] [2021-11-06 11:56:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:56:59,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:56:59,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:56:59,044 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:56:59,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 11:56:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:56:59,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-06 11:56:59,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:56:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 11:56:59,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194338128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:56:59,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:56:59,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2021-11-06 11:56:59,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434260083] [2021-11-06 11:56:59,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 11:56:59,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:56:59,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 11:56:59,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:56:59,543 INFO L87 Difference]: Start difference. First operand 14134 states and 18837 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:56:59,831 INFO L93 Difference]: Finished difference Result 22172 states and 29553 transitions. [2021-11-06 11:56:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:56:59,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 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 48 [2021-11-06 11:56:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:56:59,841 INFO L225 Difference]: With dead ends: 22172 [2021-11-06 11:56:59,841 INFO L226 Difference]: Without dead ends: 6145 [2021-11-06 11:56:59,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-06 11:56:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2021-11-06 11:56:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 4130. [2021-11-06 11:56:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4130 states, 4128 states have (on average 1.3272771317829457) internal successors, (5479), 4129 states have internal predecessors, (5479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 5479 transitions. [2021-11-06 11:56:59,985 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 5479 transitions. Word has length 48 [2021-11-06 11:56:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:56:59,985 INFO L470 AbstractCegarLoop]: Abstraction has 4130 states and 5479 transitions. [2021-11-06 11:56:59,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:56:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 5479 transitions. [2021-11-06 11:56:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-06 11:56:59,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:56:59,987 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 11:57:00,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:00,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:00,207 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1210193771, now seen corresponding path program 1 times [2021-11-06 11:57:00,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:00,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113077517] [2021-11-06 11:57:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:00,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 11:57:00,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:00,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113077517] [2021-11-06 11:57:00,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113077517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:57:00,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:57:00,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 11:57:00,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651851898] [2021-11-06 11:57:00,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 11:57:00,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 11:57:00,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 11:57:00,265 INFO L87 Difference]: Start difference. First operand 4130 states and 5479 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:00,397 INFO L93 Difference]: Finished difference Result 7551 states and 10020 transitions. [2021-11-06 11:57:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 11:57:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-06 11:57:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:00,403 INFO L225 Difference]: With dead ends: 7551 [2021-11-06 11:57:00,403 INFO L226 Difference]: Without dead ends: 3431 [2021-11-06 11:57:00,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 11:57:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-11-06 11:57:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2792. [2021-11-06 11:57:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2790 states have (on average 1.325448028673835) internal successors, (3698), 2791 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3698 transitions. [2021-11-06 11:57:00,503 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3698 transitions. Word has length 57 [2021-11-06 11:57:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:00,503 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 3698 transitions. [2021-11-06 11:57:00,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3698 transitions. [2021-11-06 11:57:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-06 11:57:00,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:00,506 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 11:57:00,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 11:57:00,506 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:00,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:00,506 INFO L85 PathProgramCache]: Analyzing trace with hash 858928939, now seen corresponding path program 1 times [2021-11-06 11:57:00,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:00,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519606175] [2021-11-06 11:57:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:00,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-06 11:57:00,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:00,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519606175] [2021-11-06 11:57:00,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519606175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 11:57:00,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 11:57:00,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 11:57:00,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793375289] [2021-11-06 11:57:00,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 11:57:00,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 11:57:00,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 11:57:00,567 INFO L87 Difference]: Start difference. First operand 2792 states and 3698 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:00,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:00,656 INFO L93 Difference]: Finished difference Result 5552 states and 7355 transitions. [2021-11-06 11:57:00,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 11:57:00,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 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 62 [2021-11-06 11:57:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:00,661 INFO L225 Difference]: With dead ends: 5552 [2021-11-06 11:57:00,661 INFO L226 Difference]: Without dead ends: 2780 [2021-11-06 11:57:00,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 11:57:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-11-06 11:57:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2780. [2021-11-06 11:57:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2778 states have (on average 1.3225341972642188) internal successors, (3674), 2779 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3674 transitions. [2021-11-06 11:57:00,757 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3674 transitions. Word has length 62 [2021-11-06 11:57:00,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:00,758 INFO L470 AbstractCegarLoop]: Abstraction has 2780 states and 3674 transitions. [2021-11-06 11:57:00,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3674 transitions. [2021-11-06 11:57:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-06 11:57:00,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:00,760 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-11-06 11:57:00,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 11:57:00,760 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash -258078779, now seen corresponding path program 1 times [2021-11-06 11:57:00,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:00,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584433683] [2021-11-06 11:57:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:00,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:00,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:00,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584433683] [2021-11-06 11:57:00,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584433683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:00,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71315699] [2021-11-06 11:57:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:00,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:00,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:57:00,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 11:57:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:01,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-06 11:57:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:01,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71315699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:01,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:01,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-06 11:57:01,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856808286] [2021-11-06 11:57:01,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 11:57:01,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:01,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 11:57:01,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:57:01,463 INFO L87 Difference]: Start difference. First operand 2780 states and 3674 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:01,576 INFO L93 Difference]: Finished difference Result 5549 states and 7337 transitions. [2021-11-06 11:57:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-06 11:57:01,576 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 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 66 [2021-11-06 11:57:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:01,581 INFO L225 Difference]: With dead ends: 5549 [2021-11-06 11:57:01,582 INFO L226 Difference]: Without dead ends: 2783 [2021-11-06 11:57:01,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-06 11:57:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-11-06 11:57:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2782. [2021-11-06 11:57:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2782 states, 2780 states have (on average 1.3223021582733814) internal successors, (3676), 2781 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 3676 transitions. [2021-11-06 11:57:01,730 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 3676 transitions. Word has length 66 [2021-11-06 11:57:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:01,731 INFO L470 AbstractCegarLoop]: Abstraction has 2782 states and 3676 transitions. [2021-11-06 11:57:01,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 3676 transitions. [2021-11-06 11:57:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 11:57:01,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:01,734 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-06 11:57:01,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:01,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-06 11:57:01,951 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:01,952 INFO L85 PathProgramCache]: Analyzing trace with hash -785581239, now seen corresponding path program 2 times [2021-11-06 11:57:01,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:01,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817654356] [2021-11-06 11:57:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:01,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:02,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:02,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817654356] [2021-11-06 11:57:02,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817654356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:02,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647655310] [2021-11-06 11:57:02,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 11:57:02,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:02,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:02,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:57:02,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 11:57:03,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 11:57:03,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-06 11:57:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:03,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647655310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:03,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:03,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-06 11:57:03,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345100785] [2021-11-06 11:57:03,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 11:57:03,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:03,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 11:57:03,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 11:57:03,497 INFO L87 Difference]: Start difference. First operand 2782 states and 3676 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:03,641 INFO L93 Difference]: Finished difference Result 5551 states and 7339 transitions. [2021-11-06 11:57:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 11:57:03,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 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 68 [2021-11-06 11:57:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:03,645 INFO L225 Difference]: With dead ends: 5551 [2021-11-06 11:57:03,645 INFO L226 Difference]: Without dead ends: 2785 [2021-11-06 11:57:03,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-06 11:57:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-11-06 11:57:03,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2784. [2021-11-06 11:57:03,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2782 states have (on average 1.3220704529115743) internal successors, (3678), 2783 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3678 transitions. [2021-11-06 11:57:03,773 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3678 transitions. Word has length 68 [2021-11-06 11:57:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:03,773 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 3678 transitions. [2021-11-06 11:57:03,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3678 transitions. [2021-11-06 11:57:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-06 11:57:03,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:03,776 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-11-06 11:57:03,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:03,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-06 11:57:03,999 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:03,999 INFO L85 PathProgramCache]: Analyzing trace with hash -909304371, now seen corresponding path program 3 times [2021-11-06 11:57:03,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:03,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626041650] [2021-11-06 11:57:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:04,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:04,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:04,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626041650] [2021-11-06 11:57:04,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626041650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:04,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971958645] [2021-11-06 11:57:04,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 11:57:04,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:04,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:04,134 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) [2021-11-06 11:57:04,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-06 11:57:08,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-06 11:57:08,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 11:57:08,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:08,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971958645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:08,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:08,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-06 11:57:08,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482594725] [2021-11-06 11:57:08,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-06 11:57:08,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:08,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-06 11:57:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 11:57:08,635 INFO L87 Difference]: Start difference. First operand 2784 states and 3678 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:08,754 INFO L93 Difference]: Finished difference Result 5553 states and 7341 transitions. [2021-11-06 11:57:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-06 11:57:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 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 70 [2021-11-06 11:57:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:08,757 INFO L225 Difference]: With dead ends: 5553 [2021-11-06 11:57:08,758 INFO L226 Difference]: Without dead ends: 2787 [2021-11-06 11:57:08,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-06 11:57:08,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-11-06 11:57:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2786. [2021-11-06 11:57:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2784 states have (on average 1.3218390804597702) internal successors, (3680), 2785 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 3680 transitions. [2021-11-06 11:57:08,858 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 3680 transitions. Word has length 70 [2021-11-06 11:57:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:08,858 INFO L470 AbstractCegarLoop]: Abstraction has 2786 states and 3680 transitions. [2021-11-06 11:57:08,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 3680 transitions. [2021-11-06 11:57:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-06 11:57:08,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:08,861 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 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] [2021-11-06 11:57:08,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:09,083 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,SelfDestructingSolverStorable17 [2021-11-06 11:57:09,083 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash 451850065, now seen corresponding path program 4 times [2021-11-06 11:57:09,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:09,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532127665] [2021-11-06 11:57:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:09,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:09,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:09,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532127665] [2021-11-06 11:57:09,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532127665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:09,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52282720] [2021-11-06 11:57:09,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 11:57:09,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:09,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:09,196 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) [2021-11-06 11:57:09,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-06 11:57:09,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 11:57:09,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-06 11:57:09,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:09,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52282720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:09,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:09,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-06 11:57:09,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273040592] [2021-11-06 11:57:09,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 11:57:09,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:09,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 11:57:09,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 11:57:09,953 INFO L87 Difference]: Start difference. First operand 2786 states and 3680 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:10,098 INFO L93 Difference]: Finished difference Result 5555 states and 7343 transitions. [2021-11-06 11:57:10,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 11:57:10,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 72 [2021-11-06 11:57:10,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:10,102 INFO L225 Difference]: With dead ends: 5555 [2021-11-06 11:57:10,102 INFO L226 Difference]: Without dead ends: 2789 [2021-11-06 11:57:10,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-06 11:57:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-11-06 11:57:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2788. [2021-11-06 11:57:10,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2786 states have (on average 1.321608040201005) internal successors, (3682), 2787 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 3682 transitions. [2021-11-06 11:57:10,263 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 3682 transitions. Word has length 72 [2021-11-06 11:57:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:10,263 INFO L470 AbstractCegarLoop]: Abstraction has 2788 states and 3682 transitions. [2021-11-06 11:57:10,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 3682 transitions. [2021-11-06 11:57:10,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-06 11:57:10,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:10,265 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 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] [2021-11-06 11:57:10,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:10,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:10,486 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1443762219, now seen corresponding path program 5 times [2021-11-06 11:57:10,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:10,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86562897] [2021-11-06 11:57:10,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:10,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:10,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:10,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86562897] [2021-11-06 11:57:10,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86562897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:10,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531326414] [2021-11-06 11:57:10,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 11:57:10,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:10,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:10,614 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) [2021-11-06 11:57:10,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-06 11:57:11,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-06 11:57:11,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:11,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 11:57:11,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:11,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531326414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:11,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:11,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-06 11:57:11,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686942380] [2021-11-06 11:57:11,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-06 11:57:11,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:11,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-06 11:57:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:57:11,802 INFO L87 Difference]: Start difference. First operand 2788 states and 3682 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:11,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:11,913 INFO L93 Difference]: Finished difference Result 5557 states and 7345 transitions. [2021-11-06 11:57:11,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-06 11:57:11,914 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-06 11:57:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:11,917 INFO L225 Difference]: With dead ends: 5557 [2021-11-06 11:57:11,917 INFO L226 Difference]: Without dead ends: 2791 [2021-11-06 11:57:11,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-06 11:57:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-11-06 11:57:12,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2790. [2021-11-06 11:57:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2788 states have (on average 1.321377331420373) internal successors, (3684), 2789 states have internal predecessors, (3684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 3684 transitions. [2021-11-06 11:57:12,012 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 3684 transitions. Word has length 74 [2021-11-06 11:57:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:12,012 INFO L470 AbstractCegarLoop]: Abstraction has 2790 states and 3684 transitions. [2021-11-06 11:57:12,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 3684 transitions. [2021-11-06 11:57:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-06 11:57:12,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:12,014 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-11-06 11:57:12,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:12,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:12,236 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2061033639, now seen corresponding path program 6 times [2021-11-06 11:57:12,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:12,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74345329] [2021-11-06 11:57:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:12,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:12,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:12,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74345329] [2021-11-06 11:57:12,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74345329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:12,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216075358] [2021-11-06 11:57:12,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-06 11:57:12,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:12,366 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) [2021-11-06 11:57:12,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-06 11:57:20,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-06 11:57:20,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:20,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-06 11:57:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:21,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216075358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:21,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:21,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-06 11:57:21,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497267065] [2021-11-06 11:57:21,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-06 11:57:21,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-06 11:57:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-06 11:57:21,030 INFO L87 Difference]: Start difference. First operand 2790 states and 3684 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:21,157 INFO L93 Difference]: Finished difference Result 5559 states and 7347 transitions. [2021-11-06 11:57:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-06 11:57:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-06 11:57:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:21,160 INFO L225 Difference]: With dead ends: 5559 [2021-11-06 11:57:21,160 INFO L226 Difference]: Without dead ends: 2793 [2021-11-06 11:57:21,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-06 11:57:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2793 states. [2021-11-06 11:57:21,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2793 to 2792. [2021-11-06 11:57:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2790 states have (on average 1.321146953405018) internal successors, (3686), 2791 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 3686 transitions. [2021-11-06 11:57:21,258 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 3686 transitions. Word has length 76 [2021-11-06 11:57:21,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:21,258 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 3686 transitions. [2021-11-06 11:57:21,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 3686 transitions. [2021-11-06 11:57:21,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-06 11:57:21,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:21,260 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 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] [2021-11-06 11:57:21,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:21,482 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,SelfDestructingSolverStorable20 [2021-11-06 11:57:21,482 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1741585885, now seen corresponding path program 7 times [2021-11-06 11:57:21,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:21,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250654381] [2021-11-06 11:57:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:21,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:21,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:21,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250654381] [2021-11-06 11:57:21,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250654381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:21,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733392699] [2021-11-06 11:57:21,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-06 11:57:21,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:21,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:21,612 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) [2021-11-06 11:57:21,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-06 11:57:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:22,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 11:57:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:22,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733392699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:22,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:22,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-06 11:57:22,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638565607] [2021-11-06 11:57:22,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-06 11:57:22,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:22,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-06 11:57:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:57:22,312 INFO L87 Difference]: Start difference. First operand 2792 states and 3686 transitions. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:22,470 INFO L93 Difference]: Finished difference Result 5561 states and 7349 transitions. [2021-11-06 11:57:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-06 11:57:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-06 11:57:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:22,475 INFO L225 Difference]: With dead ends: 5561 [2021-11-06 11:57:22,475 INFO L226 Difference]: Without dead ends: 2795 [2021-11-06 11:57:22,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-06 11:57:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-11-06 11:57:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2794. [2021-11-06 11:57:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2792 states have (on average 1.320916905444126) internal successors, (3688), 2793 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 3688 transitions. [2021-11-06 11:57:22,572 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 3688 transitions. Word has length 78 [2021-11-06 11:57:22,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:22,573 INFO L470 AbstractCegarLoop]: Abstraction has 2794 states and 3688 transitions. [2021-11-06 11:57:22,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 3688 transitions. [2021-11-06 11:57:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-06 11:57:22,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:22,575 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 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] [2021-11-06 11:57:22,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:22,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:22,792 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1041779553, now seen corresponding path program 8 times [2021-11-06 11:57:22,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:22,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342996274] [2021-11-06 11:57:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:22,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:22,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:22,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342996274] [2021-11-06 11:57:22,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342996274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:22,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085133646] [2021-11-06 11:57:22,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 11:57:22,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:22,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:22,948 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) [2021-11-06 11:57:22,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-06 11:57:24,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 11:57:24,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:24,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-06 11:57:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:24,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085133646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:24,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:24,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-06 11:57:24,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496449198] [2021-11-06 11:57:24,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-06 11:57:24,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:24,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-06 11:57:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-06 11:57:24,399 INFO L87 Difference]: Start difference. First operand 2794 states and 3688 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:24,517 INFO L93 Difference]: Finished difference Result 5563 states and 7351 transitions. [2021-11-06 11:57:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-06 11:57:24,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 80 [2021-11-06 11:57:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:24,521 INFO L225 Difference]: With dead ends: 5563 [2021-11-06 11:57:24,521 INFO L226 Difference]: Without dead ends: 2797 [2021-11-06 11:57:24,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-06 11:57:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-11-06 11:57:24,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2796. [2021-11-06 11:57:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2794 states have (on average 1.3206871868289192) internal successors, (3690), 2795 states have internal predecessors, (3690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 3690 transitions. [2021-11-06 11:57:24,612 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 3690 transitions. Word has length 80 [2021-11-06 11:57:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:24,613 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 3690 transitions. [2021-11-06 11:57:24,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 3690 transitions. [2021-11-06 11:57:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-06 11:57:24,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:24,615 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 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] [2021-11-06 11:57:24,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-06 11:57:24,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:24,822 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1457207323, now seen corresponding path program 9 times [2021-11-06 11:57:24,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:24,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090179854] [2021-11-06 11:57:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:24,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:25,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:25,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090179854] [2021-11-06 11:57:25,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090179854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:25,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756890440] [2021-11-06 11:57:25,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 11:57:25,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:25,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:25,016 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) [2021-11-06 11:57:25,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-06 11:57:42,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-06 11:57:42,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:42,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 11:57:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:42,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756890440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:42,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:42,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-06 11:57:42,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050586888] [2021-11-06 11:57:42,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-06 11:57:42,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-06 11:57:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-06 11:57:42,935 INFO L87 Difference]: Start difference. First operand 2796 states and 3690 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:43,066 INFO L93 Difference]: Finished difference Result 5565 states and 7353 transitions. [2021-11-06 11:57:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-06 11:57:43,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 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 82 [2021-11-06 11:57:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:43,070 INFO L225 Difference]: With dead ends: 5565 [2021-11-06 11:57:43,070 INFO L226 Difference]: Without dead ends: 2799 [2021-11-06 11:57:43,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-06 11:57:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-11-06 11:57:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2798. [2021-11-06 11:57:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2796 states have (on average 1.3204577968526467) internal successors, (3692), 2797 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 3692 transitions. [2021-11-06 11:57:43,165 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 3692 transitions. Word has length 82 [2021-11-06 11:57:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:43,166 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 3692 transitions. [2021-11-06 11:57:43,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 3692 transitions. [2021-11-06 11:57:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-06 11:57:43,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:43,168 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 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] [2021-11-06 11:57:43,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-06 11:57:43,372 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,SelfDestructingSolverStorable23 [2021-11-06 11:57:43,373 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:43,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2096876695, now seen corresponding path program 10 times [2021-11-06 11:57:43,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:43,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682515034] [2021-11-06 11:57:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:43,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:43,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:43,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682515034] [2021-11-06 11:57:43,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682515034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:43,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749581432] [2021-11-06 11:57:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 11:57:43,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:43,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:43,599 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) [2021-11-06 11:57:43,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-06 11:57:44,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 11:57:44,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1389 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 11:57:44,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:44,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749581432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:44,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:44,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-06 11:57:44,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001937517] [2021-11-06 11:57:44,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-06 11:57:44,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:44,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-06 11:57:44,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-06 11:57:44,962 INFO L87 Difference]: Start difference. First operand 2798 states and 3692 transitions. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:45,089 INFO L93 Difference]: Finished difference Result 5567 states and 7355 transitions. [2021-11-06 11:57:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-06 11:57:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 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 84 [2021-11-06 11:57:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:45,093 INFO L225 Difference]: With dead ends: 5567 [2021-11-06 11:57:45,093 INFO L226 Difference]: Without dead ends: 2801 [2021-11-06 11:57:45,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-06 11:57:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-11-06 11:57:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2800. [2021-11-06 11:57:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2798 states have (on average 1.320228734810579) internal successors, (3694), 2799 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 3694 transitions. [2021-11-06 11:57:45,234 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 3694 transitions. Word has length 84 [2021-11-06 11:57:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:45,234 INFO L470 AbstractCegarLoop]: Abstraction has 2800 states and 3694 transitions. [2021-11-06 11:57:45,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:45,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 3694 transitions. [2021-11-06 11:57:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-06 11:57:45,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:45,236 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 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] [2021-11-06 11:57:45,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-06 11:57:45,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:45,455 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1656147437, now seen corresponding path program 11 times [2021-11-06 11:57:45,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:45,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817241855] [2021-11-06 11:57:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:45,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:45,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:45,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817241855] [2021-11-06 11:57:45,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817241855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:45,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151275483] [2021-11-06 11:57:45,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 11:57:45,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:45,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:45,672 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) [2021-11-06 11:57:45,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-06 11:57:49,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-06 11:57:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:57:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-06 11:57:49,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:57:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:49,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151275483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:49,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:57:49,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-06 11:57:49,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835499457] [2021-11-06 11:57:49,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-06 11:57:49,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:57:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-06 11:57:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-06 11:57:49,335 INFO L87 Difference]: Start difference. First operand 2800 states and 3694 transitions. Second operand has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 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) [2021-11-06 11:57:49,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:57:49,461 INFO L93 Difference]: Finished difference Result 5569 states and 7357 transitions. [2021-11-06 11:57:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-06 11:57:49,461 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 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 86 [2021-11-06 11:57:49,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:57:49,465 INFO L225 Difference]: With dead ends: 5569 [2021-11-06 11:57:49,465 INFO L226 Difference]: Without dead ends: 2803 [2021-11-06 11:57:49,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-06 11:57:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-11-06 11:57:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2802. [2021-11-06 11:57:49,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2800 states have (on average 1.32) internal successors, (3696), 2801 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:57:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 3696 transitions. [2021-11-06 11:57:49,561 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 3696 transitions. Word has length 86 [2021-11-06 11:57:49,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:57:49,562 INFO L470 AbstractCegarLoop]: Abstraction has 2802 states and 3696 transitions. [2021-11-06 11:57:49,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 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) [2021-11-06 11:57:49,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 3696 transitions. [2021-11-06 11:57:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-06 11:57:49,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:57:49,564 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 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] [2021-11-06 11:57:49,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-06 11:57:49,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:49,783 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:57:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:57:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash 539809649, now seen corresponding path program 12 times [2021-11-06 11:57:49,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:57:49,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094370268] [2021-11-06 11:57:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:57:49,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:57:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:57:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:57:49,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:57:49,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094370268] [2021-11-06 11:57:49,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094370268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:57:49,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012552184] [2021-11-06 11:57:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-06 11:57:49,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:57:49,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:57:49,964 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:57:49,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-06 11:58:59,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-06 11:58:59,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:59:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1401 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-06 11:59:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:59:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:59:00,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012552184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:59:00,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:59:00,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-06 11:59:00,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184258292] [2021-11-06 11:59:00,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-06 11:59:00,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:59:00,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-06 11:59:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-06 11:59:00,171 INFO L87 Difference]: Start difference. First operand 2802 states and 3696 transitions. Second operand has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:59:00,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:59:00,315 INFO L93 Difference]: Finished difference Result 5571 states and 7359 transitions. [2021-11-06 11:59:00,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-06 11:59:00,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-06 11:59:00,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:59:00,319 INFO L225 Difference]: With dead ends: 5571 [2021-11-06 11:59:00,319 INFO L226 Difference]: Without dead ends: 2805 [2021-11-06 11:59:00,321 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-06 11:59:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-11-06 11:59:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2804. [2021-11-06 11:59:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2802 states have (on average 1.3197715917201998) internal successors, (3698), 2803 states have internal predecessors, (3698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:59:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 3698 transitions. [2021-11-06 11:59:00,440 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 3698 transitions. Word has length 88 [2021-11-06 11:59:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:59:00,441 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 3698 transitions. [2021-11-06 11:59:00,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:59:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 3698 transitions. [2021-11-06 11:59:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-06 11:59:00,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:59:00,442 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 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] [2021-11-06 11:59:00,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-06 11:59:00,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:59:00,657 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:59:00,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:59:00,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1481019381, now seen corresponding path program 13 times [2021-11-06 11:59:00,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:59:00,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239702918] [2021-11-06 11:59:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:59:00,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:59:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:59:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:59:00,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:59:00,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239702918] [2021-11-06 11:59:00,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239702918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:59:00,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861747759] [2021-11-06 11:59:00,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-06 11:59:00,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:59:00,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:59:00,889 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:59:00,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-06 11:59:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:59:01,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-06 11:59:01,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:59:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:59:01,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861747759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:59:01,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:59:01,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-06 11:59:01,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421496643] [2021-11-06 11:59:01,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-06 11:59:01,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:59:01,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-06 11:59:01,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-06 11:59:01,726 INFO L87 Difference]: Start difference. First operand 2804 states and 3698 transitions. Second operand has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:59:01,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:59:01,861 INFO L93 Difference]: Finished difference Result 5573 states and 7361 transitions. [2021-11-06 11:59:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-06 11:59:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-06 11:59:01,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:59:01,864 INFO L225 Difference]: With dead ends: 5573 [2021-11-06 11:59:01,864 INFO L226 Difference]: Without dead ends: 2807 [2021-11-06 11:59:01,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-06 11:59:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-11-06 11:59:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2806. [2021-11-06 11:59:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2804 states have (on average 1.3195435092724679) internal successors, (3700), 2805 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:59:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 3700 transitions. [2021-11-06 11:59:01,956 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 3700 transitions. Word has length 90 [2021-11-06 11:59:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:59:01,956 INFO L470 AbstractCegarLoop]: Abstraction has 2806 states and 3700 transitions. [2021-11-06 11:59:01,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.285714285714286) internal successors, (90), 21 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:59:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 3700 transitions. [2021-11-06 11:59:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-06 11:59:01,958 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:59:01,958 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 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] [2021-11-06 11:59:01,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-06 11:59:02,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-06 11:59:02,178 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:59:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:59:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash -254527623, now seen corresponding path program 14 times [2021-11-06 11:59:02,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:59:02,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832439724] [2021-11-06 11:59:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:59:02,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:59:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:59:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:59:02,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:59:02,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832439724] [2021-11-06 11:59:02,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832439724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:59:02,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431186205] [2021-11-06 11:59:02,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 11:59:02,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:59:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:59:02,438 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:59:02,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-06 11:59:03,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 11:59:03,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 11:59:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-06 11:59:03,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 11:59:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:59:03,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431186205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:59:03,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 11:59:03,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-06 11:59:03,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904394445] [2021-11-06 11:59:03,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-06 11:59:03,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 11:59:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-06 11:59:03,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-06 11:59:03,962 INFO L87 Difference]: Start difference. First operand 2806 states and 3700 transitions. Second operand has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 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) [2021-11-06 11:59:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 11:59:04,092 INFO L93 Difference]: Finished difference Result 5575 states and 7363 transitions. [2021-11-06 11:59:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-06 11:59:04,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 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 92 [2021-11-06 11:59:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 11:59:04,098 INFO L225 Difference]: With dead ends: 5575 [2021-11-06 11:59:04,098 INFO L226 Difference]: Without dead ends: 2809 [2021-11-06 11:59:04,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-06 11:59:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-11-06 11:59:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2808. [2021-11-06 11:59:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2806 states have (on average 1.3193157519600855) internal successors, (3702), 2807 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 11:59:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 3702 transitions. [2021-11-06 11:59:04,196 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 3702 transitions. Word has length 92 [2021-11-06 11:59:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 11:59:04,196 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 3702 transitions. [2021-11-06 11:59:04,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 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) [2021-11-06 11:59:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 3702 transitions. [2021-11-06 11:59:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-06 11:59:04,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 11:59:04,198 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 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] [2021-11-06 11:59:04,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-06 11:59:04,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-06 11:59:04,419 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 11:59:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 11:59:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1667887619, now seen corresponding path program 15 times [2021-11-06 11:59:04,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 11:59:04,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505395962] [2021-11-06 11:59:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 11:59:04,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 11:59:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 11:59:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 11:59:04,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 11:59:04,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505395962] [2021-11-06 11:59:04,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505395962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 11:59:04,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197917724] [2021-11-06 11:59:04,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 11:59:04,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 11:59:04,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 11:59:04,685 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 11:59:04,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-06 12:00:15,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-06 12:00:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 12:00:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-06 12:00:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 12:00:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 12:00:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197917724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 12:00:15,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 12:00:15,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-06 12:00:15,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299114399] [2021-11-06 12:00:15,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-06 12:00:15,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 12:00:15,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-06 12:00:15,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-06 12:00:15,459 INFO L87 Difference]: Start difference. First operand 2808 states and 3702 transitions. Second operand has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 12:00:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 12:00:15,646 INFO L93 Difference]: Finished difference Result 5577 states and 7365 transitions. [2021-11-06 12:00:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-06 12:00:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 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 [2021-11-06 12:00:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 12:00:15,650 INFO L225 Difference]: With dead ends: 5577 [2021-11-06 12:00:15,650 INFO L226 Difference]: Without dead ends: 2811 [2021-11-06 12:00:15,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-06 12:00:15,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2021-11-06 12:00:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2810. [2021-11-06 12:00:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2808 states have (on average 1.3190883190883191) internal successors, (3704), 2809 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 12:00:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 3704 transitions. [2021-11-06 12:00:15,787 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 3704 transitions. Word has length 94 [2021-11-06 12:00:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 12:00:15,787 INFO L470 AbstractCegarLoop]: Abstraction has 2810 states and 3704 transitions. [2021-11-06 12:00:15,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.086956521739131) internal successors, (94), 23 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 12:00:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 3704 transitions. [2021-11-06 12:00:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-06 12:00:15,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 12:00:15,790 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 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] [2021-11-06 12:00:15,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-06 12:00:16,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 12:00:16,006 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 12:00:16,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 12:00:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1597789057, now seen corresponding path program 16 times [2021-11-06 12:00:16,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 12:00:16,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117831530] [2021-11-06 12:00:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 12:00:16,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 12:00:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 12:00:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 12:00:16,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 12:00:16,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117831530] [2021-11-06 12:00:16,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117831530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 12:00:16,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76080318] [2021-11-06 12:00:16,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 12:00:16,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 12:00:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 12:00:16,276 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 12:00:16,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-06 12:00:18,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 12:00:18,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 12:00:18,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-06 12:00:18,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 12:00:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 12:00:18,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76080318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 12:00:18,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 12:00:18,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-06 12:00:18,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372751020] [2021-11-06 12:00:18,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-06 12:00:18,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 12:00:18,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-06 12:00:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-06 12:00:18,880 INFO L87 Difference]: Start difference. First operand 2810 states and 3704 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 12:00:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 12:00:19,033 INFO L93 Difference]: Finished difference Result 5579 states and 7367 transitions. [2021-11-06 12:00:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-06 12:00:19,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 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 96 [2021-11-06 12:00:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 12:00:19,037 INFO L225 Difference]: With dead ends: 5579 [2021-11-06 12:00:19,037 INFO L226 Difference]: Without dead ends: 2813 [2021-11-06 12:00:19,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-06 12:00:19,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2021-11-06 12:00:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2812. [2021-11-06 12:00:19,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2810 states have (on average 1.3188612099644128) internal successors, (3706), 2811 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 12:00:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3706 transitions. [2021-11-06 12:00:19,132 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3706 transitions. Word has length 96 [2021-11-06 12:00:19,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 12:00:19,133 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 3706 transitions. [2021-11-06 12:00:19,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 12:00:19,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3706 transitions. [2021-11-06 12:00:19,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-06 12:00:19,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 12:00:19,135 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 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] [2021-11-06 12:00:19,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-06 12:00:19,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 12:00:19,341 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 12:00:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 12:00:19,342 INFO L85 PathProgramCache]: Analyzing trace with hash 291981317, now seen corresponding path program 17 times [2021-11-06 12:00:19,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 12:00:19,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974577076] [2021-11-06 12:00:19,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 12:00:19,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 12:00:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 12:00:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 12:00:19,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 12:00:19,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974577076] [2021-11-06 12:00:19,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974577076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 12:00:19,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057851071] [2021-11-06 12:00:19,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 12:00:19,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 12:00:19,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 12:00:19,632 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 12:00:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-06 12:02:10,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-06 12:02:10,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 12:02:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-06 12:02:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 12:02:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 12:02:10,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057851071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 12:02:10,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 12:02:10,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-06 12:02:10,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985708556] [2021-11-06 12:02:10,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-06 12:02:10,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 12:02:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-06 12:02:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-06 12:02:10,635 INFO L87 Difference]: Start difference. First operand 2812 states and 3706 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 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) [2021-11-06 12:02:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 12:02:10,783 INFO L93 Difference]: Finished difference Result 5581 states and 7369 transitions. [2021-11-06 12:02:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-06 12:02:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 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 98 [2021-11-06 12:02:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 12:02:10,788 INFO L225 Difference]: With dead ends: 5581 [2021-11-06 12:02:10,788 INFO L226 Difference]: Without dead ends: 2815 [2021-11-06 12:02:10,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-06 12:02:10,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-11-06 12:02:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2814. [2021-11-06 12:02:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2812 states have (on average 1.3186344238975818) internal successors, (3708), 2813 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 12:02:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 3708 transitions. [2021-11-06 12:02:10,937 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 3708 transitions. Word has length 98 [2021-11-06 12:02:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 12:02:10,937 INFO L470 AbstractCegarLoop]: Abstraction has 2814 states and 3708 transitions. [2021-11-06 12:02:10,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 25 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) [2021-11-06 12:02:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 3708 transitions. [2021-11-06 12:02:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-06 12:02:10,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 12:02:10,939 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 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] [2021-11-06 12:02:10,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-06 12:02:11,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 12:02:11,152 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-06 12:02:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 12:02:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash -458806391, now seen corresponding path program 18 times [2021-11-06 12:02:11,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 12:02:11,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734520948] [2021-11-06 12:02:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 12:02:11,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 12:02:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 12:02:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-06 12:02:11,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 12:02:11,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734520948] [2021-11-06 12:02:11,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734520948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 12:02:11,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970591490] [2021-11-06 12:02:11,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-06 12:02:11,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 12:02:11,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 12:02:11,436 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 12:02:11,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process Killed by 15