./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 13:13:37,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 13:13:37,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 13:13:37,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 13:13:37,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 13:13:37,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 13:13:37,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 13:13:37,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 13:13:37,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 13:13:37,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 13:13:37,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 13:13:37,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 13:13:37,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 13:13:37,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 13:13:37,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 13:13:37,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 13:13:37,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 13:13:37,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 13:13:37,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 13:13:37,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 13:13:37,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 13:13:37,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 13:13:37,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 13:13:37,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 13:13:37,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 13:13:37,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 13:13:37,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 13:13:37,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 13:13:37,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 13:13:37,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 13:13:37,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 13:13:37,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 13:13:37,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 13:13:37,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 13:13:37,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 13:13:37,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 13:13:37,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 13:13:37,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 13:13:37,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 13:13:37,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 13:13:37,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 13:13:37,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 13:13:37,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 13:13:37,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 13:13:37,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 13:13:37,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 13:13:37,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 13:13:37,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 13:13:37,867 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 13:13:37,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 13:13:37,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 13:13:37,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 13:13:37,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 13:13:37,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 13:13:37,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 13:13:37,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 13:13:37,868 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 13:13:37,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 13:13:37,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 13:13:37,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 13:13:37,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 13:13:37,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:13:37,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 13:13:37,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 13:13:37,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 13:13:37,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 13:13:37,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 13:13:37,870 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 13:13:37,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 13:13:37,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 13:13:37,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 13:13:37,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-07 13:13:38,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 13:13:38,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 13:13:38,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 13:13:38,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 13:13:38,091 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 13:13:38,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 13:13:38,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22aea0828/e186970008564743bba4f869db5fb41e/FLAGc92a0704e [2021-11-07 13:13:38,707 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 13:13:38,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 13:13:38,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22aea0828/e186970008564743bba4f869db5fb41e/FLAGc92a0704e [2021-11-07 13:13:39,114 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22aea0828/e186970008564743bba4f869db5fb41e [2021-11-07 13:13:39,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 13:13:39,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 13:13:39,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 13:13:39,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 13:13:39,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 13:13:39,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:39" (1/1) ... [2021-11-07 13:13:39,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33bfae7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:39, skipping insertion in model container [2021-11-07 13:13:39,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:13:39" (1/1) ... [2021-11-07 13:13:39,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 13:13:39,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 13:13:39,783 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-07 13:13:40,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:13:40,042 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 13:13:40,140 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-07 13:13:40,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:13:40,277 INFO L208 MainTranslator]: Completed translation [2021-11-07 13:13:40,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40 WrapperNode [2021-11-07 13:13:40,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 13:13:40,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 13:13:40,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 13:13:40,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 13:13:40,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 13:13:40,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 13:13:40,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 13:13:40,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 13:13:40,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 13:13:40,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 13:13:40,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 13:13:40,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 13:13:40,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (1/1) ... [2021-11-07 13:13:40,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:13:40,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:13:40,629 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) [2021-11-07 13:13:40,675 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 [2021-11-07 13:13:40,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 13:13:40,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 13:13:40,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 13:13:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 13:13:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 13:13:40,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 13:13:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 13:13:45,194 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 13:13:45,195 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-07 13:13:45,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:45 BoogieIcfgContainer [2021-11-07 13:13:45,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 13:13:45,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 13:13:45,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 13:13:45,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 13:13:45,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:13:39" (1/3) ... [2021-11-07 13:13:45,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0eb84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:13:45, skipping insertion in model container [2021-11-07 13:13:45,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:13:40" (2/3) ... [2021-11-07 13:13:45,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0eb84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:13:45, skipping insertion in model container [2021-11-07 13:13:45,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:13:45" (3/3) ... [2021-11-07 13:13:45,203 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 13:13:45,207 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 13:13:45,207 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 13:13:45,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 13:13:45,250 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 [2021-11-07 13:13:45,251 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 13:13:45,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 13:13:45,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:45,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:45,287 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:45,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-07 13:13:45,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:45,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121411131] [2021-11-07 13:13:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:45,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:13:45,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:45,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121411131] [2021-11-07 13:13:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121411131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:45,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:45,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:13:45,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738777234] [2021-11-07 13:13:45,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:45,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:13:45,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:13:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:45,698 INFO L87 Difference]: Start difference. First operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 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 12.0) internal successors, (36), 3 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) [2021-11-07 13:13:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:45,890 INFO L93 Difference]: Finished difference Result 2608 states and 3995 transitions. [2021-11-07 13:13:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:13:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 36 [2021-11-07 13:13:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:45,907 INFO L225 Difference]: With dead ends: 2608 [2021-11-07 13:13:45,907 INFO L226 Difference]: Without dead ends: 1703 [2021-11-07 13:13:45,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.47ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:45,915 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 1205 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.24ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.68ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:45,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 2586 Invalid, 15 Unknown, 0 Unchecked, 13.24ms Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 67.68ms Time] [2021-11-07 13:13:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-11-07 13:13:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1703. [2021-11-07 13:13:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 1.4618096357226793) internal successors, (2488), 1702 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:46,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2488 transitions. [2021-11-07 13:13:46,014 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2488 transitions. Word has length 36 [2021-11-07 13:13:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:46,014 INFO L470 AbstractCegarLoop]: Abstraction has 1703 states and 2488 transitions. [2021-11-07 13:13:46,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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) [2021-11-07 13:13:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2488 transitions. [2021-11-07 13:13:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 13:13:46,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:46,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:46,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 13:13:46,022 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-07 13:13:46,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:46,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658815702] [2021-11-07 13:13:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:46,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:13:46,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:46,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658815702] [2021-11-07 13:13:46,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658815702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:46,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:46,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:13:46,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706662623] [2021-11-07 13:13:46,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:46,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:13:46,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:13:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:13:46,139 INFO L87 Difference]: Start difference. First operand 1703 states and 2488 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 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) [2021-11-07 13:13:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:46,448 INFO L93 Difference]: Finished difference Result 5001 states and 7337 transitions. [2021-11-07 13:13:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:13:46,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 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 40 [2021-11-07 13:13:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:46,460 INFO L225 Difference]: With dead ends: 5001 [2021-11-07 13:13:46,460 INFO L226 Difference]: Without dead ends: 3345 [2021-11-07 13:13:46,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.71ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:13:46,463 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 1260 mSDsluCounter, 3616 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1260 SdHoareTripleChecker+Valid, 4843 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.01ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.06ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:46,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1260 Valid, 4843 Invalid, 263 Unknown, 0 Unchecked, 8.01ms Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 152.06ms Time] [2021-11-07 13:13:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-11-07 13:13:46,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 3249. [2021-11-07 13:13:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3249 states, 3248 states have (on average 1.4716748768472907) internal successors, (4780), 3248 states have internal predecessors, (4780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 4780 transitions. [2021-11-07 13:13:46,516 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 4780 transitions. Word has length 40 [2021-11-07 13:13:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:46,517 INFO L470 AbstractCegarLoop]: Abstraction has 3249 states and 4780 transitions. [2021-11-07 13:13:46,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 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) [2021-11-07 13:13:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 4780 transitions. [2021-11-07 13:13:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 13:13:46,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:46,521 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:46,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 13:13:46,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:46,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:46,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1564766953, now seen corresponding path program 1 times [2021-11-07 13:13:46,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:46,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879355412] [2021-11-07 13:13:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:46,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:13:46,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:46,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879355412] [2021-11-07 13:13:46,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879355412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:46,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:46,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:13:46,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792309454] [2021-11-07 13:13:46,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:46,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:13:46,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:46,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:13:46,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:46,568 INFO L87 Difference]: Start difference. First operand 3249 states and 4780 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:46,673 INFO L93 Difference]: Finished difference Result 7909 states and 11681 transitions. [2021-11-07 13:13:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:13:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 13:13:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:46,690 INFO L225 Difference]: With dead ends: 7909 [2021-11-07 13:13:46,690 INFO L226 Difference]: Without dead ends: 4713 [2021-11-07 13:13:46,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.21ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:46,695 INFO L933 BasicCegarLoop]: 1297 mSDtfsCounter, 629 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.19ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:46,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 2486 Invalid, 41 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 32.19ms Time] [2021-11-07 13:13:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-11-07 13:13:46,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4693. [2021-11-07 13:13:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 1.4786871270247228) internal successors, (6938), 4692 states have internal predecessors, (6938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:46,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 6938 transitions. [2021-11-07 13:13:46,780 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 6938 transitions. Word has length 69 [2021-11-07 13:13:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:46,781 INFO L470 AbstractCegarLoop]: Abstraction has 4693 states and 6938 transitions. [2021-11-07 13:13:46,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 6938 transitions. [2021-11-07 13:13:46,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 13:13:46,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:46,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:46,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 13:13:46,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:46,786 INFO L85 PathProgramCache]: Analyzing trace with hash 36804616, now seen corresponding path program 1 times [2021-11-07 13:13:46,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:46,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777946713] [2021-11-07 13:13:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:46,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:13:46,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:46,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777946713] [2021-11-07 13:13:46,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777946713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:46,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:46,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:13:46,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920176376] [2021-11-07 13:13:46,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:46,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:13:46,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:46,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:13:46,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:46,835 INFO L87 Difference]: Start difference. First operand 4693 states and 6938 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:46,988 INFO L93 Difference]: Finished difference Result 11205 states and 16555 transitions. [2021-11-07 13:13:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:13:46,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-07 13:13:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:47,008 INFO L225 Difference]: With dead ends: 11205 [2021-11-07 13:13:47,009 INFO L226 Difference]: Without dead ends: 6565 [2021-11-07 13:13:47,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.43ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:47,016 INFO L933 BasicCegarLoop]: 1953 mSDtfsCounter, 747 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.03ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:47,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 3172 Invalid, 11 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 21.03ms Time] [2021-11-07 13:13:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6565 states. [2021-11-07 13:13:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6565 to 6557. [2021-11-07 13:13:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6557 states, 6556 states have (on average 1.4740695546064673) internal successors, (9664), 6556 states have internal predecessors, (9664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 9664 transitions. [2021-11-07 13:13:47,145 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 9664 transitions. Word has length 75 [2021-11-07 13:13:47,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:47,145 INFO L470 AbstractCegarLoop]: Abstraction has 6557 states and 9664 transitions. [2021-11-07 13:13:47,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 9664 transitions. [2021-11-07 13:13:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 13:13:47,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:47,150 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:47,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 13:13:47,151 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-07 13:13:47,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:47,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990682740] [2021-11-07 13:13:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:47,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:13:47,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:47,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990682740] [2021-11-07 13:13:47,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990682740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:47,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:47,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:13:47,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635969240] [2021-11-07 13:13:47,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:47,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:13:47,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:13:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:47,198 INFO L87 Difference]: Start difference. First operand 6557 states and 9664 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:47,422 INFO L93 Difference]: Finished difference Result 14781 states and 21907 transitions. [2021-11-07 13:13:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:13:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-07 13:13:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:47,462 INFO L225 Difference]: With dead ends: 14781 [2021-11-07 13:13:47,462 INFO L226 Difference]: Without dead ends: 8277 [2021-11-07 13:13:47,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.37ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:47,473 INFO L933 BasicCegarLoop]: 1312 mSDtfsCounter, 763 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.34ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:47,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [763 Valid, 2390 Invalid, 65 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 61.34ms Time] [2021-11-07 13:13:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2021-11-07 13:13:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8257. [2021-11-07 13:13:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8257 states, 8256 states have (on average 1.4752906976744187) internal successors, (12180), 8256 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8257 states to 8257 states and 12180 transitions. [2021-11-07 13:13:47,650 INFO L78 Accepts]: Start accepts. Automaton has 8257 states and 12180 transitions. Word has length 83 [2021-11-07 13:13:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:47,653 INFO L470 AbstractCegarLoop]: Abstraction has 8257 states and 12180 transitions. [2021-11-07 13:13:47,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 8257 states and 12180 transitions. [2021-11-07 13:13:47,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 13:13:47,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:47,658 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:47,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 13:13:47,658 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:47,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-07 13:13:47,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:47,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883197784] [2021-11-07 13:13:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:47,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:13:47,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:47,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883197784] [2021-11-07 13:13:47,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883197784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:47,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:47,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:13:47,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610878881] [2021-11-07 13:13:47,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:47,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:13:47,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:13:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:47,757 INFO L87 Difference]: Start difference. First operand 8257 states and 12180 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:48,074 INFO L93 Difference]: Finished difference Result 19919 states and 29468 transitions. [2021-11-07 13:13:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:13:48,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2021-11-07 13:13:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:48,107 INFO L225 Difference]: With dead ends: 19919 [2021-11-07 13:13:48,108 INFO L226 Difference]: Without dead ends: 15701 [2021-11-07 13:13:48,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.79ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:48,120 INFO L933 BasicCegarLoop]: 2321 mSDtfsCounter, 1130 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.96ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.32ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:48,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 3504 Invalid, 73 Unknown, 0 Unchecked, 4.96ms Time], IncrementalHoareTripleChecker [37 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 58.32ms Time] [2021-11-07 13:13:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15701 states. [2021-11-07 13:13:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15701 to 8369. [2021-11-07 13:13:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8369 states, 8368 states have (on average 1.4689292543021033) internal successors, (12292), 8368 states have internal predecessors, (12292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8369 states to 8369 states and 12292 transitions. [2021-11-07 13:13:48,422 INFO L78 Accepts]: Start accepts. Automaton has 8369 states and 12292 transitions. Word has length 84 [2021-11-07 13:13:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:48,423 INFO L470 AbstractCegarLoop]: Abstraction has 8369 states and 12292 transitions. [2021-11-07 13:13:48,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:48,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8369 states and 12292 transitions. [2021-11-07 13:13:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 13:13:48,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:48,427 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:48,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 13:13:48,428 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:48,428 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-07 13:13:48,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:48,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190424599] [2021-11-07 13:13:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:48,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:13:48,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:48,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190424599] [2021-11-07 13:13:48,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190424599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:48,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:48,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:13:48,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488079641] [2021-11-07 13:13:48,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:48,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:48,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:48,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:48,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:48,498 INFO L87 Difference]: Start difference. First operand 8369 states and 12292 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:48,837 INFO L93 Difference]: Finished difference Result 20135 states and 29611 transitions. [2021-11-07 13:13:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:13:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 13:13:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:48,862 INFO L225 Difference]: With dead ends: 20135 [2021-11-07 13:13:48,862 INFO L226 Difference]: Without dead ends: 11819 [2021-11-07 13:13:48,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.64ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:48,878 INFO L933 BasicCegarLoop]: 2316 mSDtfsCounter, 2208 mSDsluCounter, 2254 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2208 SdHoareTripleChecker+Valid, 4570 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.58ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.57ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:48,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2208 Valid, 4570 Invalid, 111 Unknown, 0 Unchecked, 10.58ms Time], IncrementalHoareTripleChecker [23 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 96.57ms Time] [2021-11-07 13:13:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11819 states. [2021-11-07 13:13:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11819 to 8201. [2021-11-07 13:13:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8200 states have (on average 1.4580487804878048) internal successors, (11956), 8200 states have internal predecessors, (11956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11956 transitions. [2021-11-07 13:13:49,143 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11956 transitions. Word has length 86 [2021-11-07 13:13:49,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:49,144 INFO L470 AbstractCegarLoop]: Abstraction has 8201 states and 11956 transitions. [2021-11-07 13:13:49,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11956 transitions. [2021-11-07 13:13:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 13:13:49,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:49,154 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:49,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 13:13:49,154 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash -265952138, now seen corresponding path program 1 times [2021-11-07 13:13:49,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:49,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585933629] [2021-11-07 13:13:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:49,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:49,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:13:49,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:49,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585933629] [2021-11-07 13:13:49,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585933629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:49,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:49,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:13:49,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957648811] [2021-11-07 13:13:49,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:49,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:49,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:49,228 INFO L87 Difference]: Start difference. First operand 8201 states and 11956 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:49,502 INFO L93 Difference]: Finished difference Result 19005 states and 27638 transitions. [2021-11-07 13:13:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:13:49,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 119 [2021-11-07 13:13:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:49,521 INFO L225 Difference]: With dead ends: 19005 [2021-11-07 13:13:49,521 INFO L226 Difference]: Without dead ends: 10857 [2021-11-07 13:13:49,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.06ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:13:49,532 INFO L933 BasicCegarLoop]: 2065 mSDtfsCounter, 1523 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 4666 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.85ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:49,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 4666 Invalid, 16 Unknown, 0 Unchecked, 6.81ms Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 23.85ms Time] [2021-11-07 13:13:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10857 states. [2021-11-07 13:13:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10857 to 8217. [2021-11-07 13:13:49,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8217 states, 8216 states have (on average 1.4571567672833496) internal successors, (11972), 8216 states have internal predecessors, (11972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8217 states to 8217 states and 11972 transitions. [2021-11-07 13:13:49,721 INFO L78 Accepts]: Start accepts. Automaton has 8217 states and 11972 transitions. Word has length 119 [2021-11-07 13:13:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:49,721 INFO L470 AbstractCegarLoop]: Abstraction has 8217 states and 11972 transitions. [2021-11-07 13:13:49,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:49,721 INFO L276 IsEmpty]: Start isEmpty. Operand 8217 states and 11972 transitions. [2021-11-07 13:13:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 13:13:49,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:49,727 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:49,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 13:13:49,728 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:49,728 INFO L85 PathProgramCache]: Analyzing trace with hash 464660825, now seen corresponding path program 1 times [2021-11-07 13:13:49,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:49,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610654180] [2021-11-07 13:13:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:49,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:13:49,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:49,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610654180] [2021-11-07 13:13:49,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610654180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:49,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:49,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 13:13:49,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638346922] [2021-11-07 13:13:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:49,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:49,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:13:49,860 INFO L87 Difference]: Start difference. First operand 8217 states and 11972 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:50,712 INFO L93 Difference]: Finished difference Result 40548 states and 59167 transitions. [2021-11-07 13:13:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:13:50,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 13:13:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:50,786 INFO L225 Difference]: With dead ends: 40548 [2021-11-07 13:13:50,787 INFO L226 Difference]: Without dead ends: 32384 [2021-11-07 13:13:50,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.35ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:13:50,814 INFO L933 BasicCegarLoop]: 2561 mSDtfsCounter, 3663 mSDsluCounter, 3849 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3663 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.24ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.89ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:50,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3663 Valid, 6410 Invalid, 83 Unknown, 0 Unchecked, 13.24ms Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 57.89ms Time] [2021-11-07 13:13:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2021-11-07 13:13:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 8233. [2021-11-07 13:13:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8233 states, 8232 states have (on average 1.456268221574344) internal successors, (11988), 8232 states have internal predecessors, (11988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8233 states to 8233 states and 11988 transitions. [2021-11-07 13:13:51,313 INFO L78 Accepts]: Start accepts. Automaton has 8233 states and 11988 transitions. Word has length 126 [2021-11-07 13:13:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:51,314 INFO L470 AbstractCegarLoop]: Abstraction has 8233 states and 11988 transitions. [2021-11-07 13:13:51,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 8233 states and 11988 transitions. [2021-11-07 13:13:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 13:13:51,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:51,326 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:51,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 13:13:51,326 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:51,327 INFO L85 PathProgramCache]: Analyzing trace with hash 772581936, now seen corresponding path program 1 times [2021-11-07 13:13:51,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:51,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660129978] [2021-11-07 13:13:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:51,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:13:51,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:51,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660129978] [2021-11-07 13:13:51,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660129978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:13:51,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154035348] [2021-11-07 13:13:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:51,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:13:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:13:51,475 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) [2021-11-07 13:13:51,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 13:13:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:51,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:13:51,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:13:52,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:13:52,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154035348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:52,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:13:52,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-07 13:13:52,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235611471] [2021-11-07 13:13:52,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:52,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:13:52,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:13:52,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:13:52,131 INFO L87 Difference]: Start difference. First operand 8233 states and 11988 transitions. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:52,552 INFO L93 Difference]: Finished difference Result 21501 states and 31227 transitions. [2021-11-07 13:13:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 13:13:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 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 129 [2021-11-07 13:13:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:52,575 INFO L225 Difference]: With dead ends: 21501 [2021-11-07 13:13:52,576 INFO L226 Difference]: Without dead ends: 13321 [2021-11-07 13:13:52,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.01ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 13:13:52,591 INFO L933 BasicCegarLoop]: 2808 mSDtfsCounter, 2289 mSDsluCounter, 4605 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2289 SdHoareTripleChecker+Valid, 7413 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.43ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.65ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:52,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2289 Valid, 7413 Invalid, 38 Unknown, 0 Unchecked, 6.43ms Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 46.65ms Time] [2021-11-07 13:13:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13321 states. [2021-11-07 13:13:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13321 to 8241. [2021-11-07 13:13:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8241 states, 8240 states have (on average 1.4558252427184466) internal successors, (11996), 8240 states have internal predecessors, (11996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11996 transitions. [2021-11-07 13:13:52,841 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11996 transitions. Word has length 129 [2021-11-07 13:13:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:52,841 INFO L470 AbstractCegarLoop]: Abstraction has 8241 states and 11996 transitions. [2021-11-07 13:13:52,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11996 transitions. [2021-11-07 13:13:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 13:13:52,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:52,848 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:52,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 13:13:53,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 13:13:53,068 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2006158458, now seen corresponding path program 1 times [2021-11-07 13:13:53,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:53,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749352350] [2021-11-07 13:13:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:53,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:13:53,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:53,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749352350] [2021-11-07 13:13:53,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749352350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:13:53,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588125498] [2021-11-07 13:13:53,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:53,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:13:53,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:13:53,205 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) [2021-11-07 13:13:53,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 13:13:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:53,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:13:53,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:13:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:13:54,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-07 13:13:54,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588125498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:54,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:13:54,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-07 13:13:54,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180517894] [2021-11-07 13:13:54,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:54,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:13:54,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:54,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:13:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:13:54,003 INFO L87 Difference]: Start difference. First operand 8241 states and 11996 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:54,288 INFO L93 Difference]: Finished difference Result 10931 states and 15825 transitions. [2021-11-07 13:13:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:13:54,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 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 144 [2021-11-07 13:13:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:54,307 INFO L225 Difference]: With dead ends: 10931 [2021-11-07 13:13:54,307 INFO L226 Difference]: Without dead ends: 10923 [2021-11-07 13:13:54,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.63ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:13:54,311 INFO L933 BasicCegarLoop]: 1985 mSDtfsCounter, 1995 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1995 SdHoareTripleChecker+Valid, 2823 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.74ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:54,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1995 Valid, 2823 Invalid, 14 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 21.74ms Time] [2021-11-07 13:13:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2021-11-07 13:13:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 9639. [2021-11-07 13:13:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 9638 states have (on average 1.4522722556547) internal successors, (13997), 9638 states have internal predecessors, (13997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:54,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 13997 transitions. [2021-11-07 13:13:54,650 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 13997 transitions. Word has length 144 [2021-11-07 13:13:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:54,651 INFO L470 AbstractCegarLoop]: Abstraction has 9639 states and 13997 transitions. [2021-11-07 13:13:54,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 13997 transitions. [2021-11-07 13:13:54,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 13:13:54,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:54,660 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:54,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 13:13:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 13:13:54,876 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:54,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash -290010734, now seen corresponding path program 1 times [2021-11-07 13:13:54,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:54,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861538167] [2021-11-07 13:13:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:54,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:13:54,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:54,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861538167] [2021-11-07 13:13:54,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861538167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:54,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:54,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 13:13:54,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578662313] [2021-11-07 13:13:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:54,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:13:54,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:13:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:54,991 INFO L87 Difference]: Start difference. First operand 9639 states and 13997 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:55,257 INFO L93 Difference]: Finished difference Result 14409 states and 20943 transitions. [2021-11-07 13:13:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:13:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-07 13:13:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:55,265 INFO L225 Difference]: With dead ends: 14409 [2021-11-07 13:13:55,265 INFO L226 Difference]: Without dead ends: 4081 [2021-11-07 13:13:55,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.39ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:13:55,276 INFO L933 BasicCegarLoop]: 1305 mSDtfsCounter, 1120 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.78ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.00ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:55,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 1394 Invalid, 11 Unknown, 0 Unchecked, 1.78ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 42.00ms Time] [2021-11-07 13:13:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2021-11-07 13:13:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 4081. [2021-11-07 13:13:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4081 states, 4080 states have (on average 1.4424019607843137) internal successors, (5885), 4080 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5885 transitions. [2021-11-07 13:13:55,440 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5885 transitions. Word has length 148 [2021-11-07 13:13:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:55,441 INFO L470 AbstractCegarLoop]: Abstraction has 4081 states and 5885 transitions. [2021-11-07 13:13:55,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5885 transitions. [2021-11-07 13:13:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-07 13:13:55,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:55,447 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:55,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 13:13:55,447 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash 527780847, now seen corresponding path program 1 times [2021-11-07 13:13:55,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:55,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975339486] [2021-11-07 13:13:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:55,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 13:13:55,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:55,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975339486] [2021-11-07 13:13:55,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975339486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:55,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:55,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 13:13:55,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780705645] [2021-11-07 13:13:55,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:55,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 13:13:55,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:55,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 13:13:55,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:13:55,662 INFO L87 Difference]: Start difference. First operand 4081 states and 5885 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:57,800 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:13:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:58,276 INFO L93 Difference]: Finished difference Result 15553 states and 22553 transitions. [2021-11-07 13:13:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 13:13:58,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-07 13:13:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:13:58,326 INFO L225 Difference]: With dead ends: 15553 [2021-11-07 13:13:58,327 INFO L226 Difference]: Without dead ends: 11558 [2021-11-07 13:13:58,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.35ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-07 13:13:58,343 INFO L933 BasicCegarLoop]: 2443 mSDtfsCounter, 7613 mSDsluCounter, 11114 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2067.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7613 SdHoareTripleChecker+Valid, 13557 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.16ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2098.33ms IncrementalHoareTripleChecker+Time [2021-11-07 13:13:58,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7613 Valid, 13557 Invalid, 63 Unknown, 0 Unchecked, 12.16ms Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 1 Unknown, 0 Unchecked, 2098.33ms Time] [2021-11-07 13:13:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11558 states. [2021-11-07 13:13:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11558 to 4111. [2021-11-07 13:13:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4111 states, 4110 states have (on average 1.4391727493917275) internal successors, (5915), 4110 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 5915 transitions. [2021-11-07 13:13:58,647 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 5915 transitions. Word has length 156 [2021-11-07 13:13:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:13:58,647 INFO L470 AbstractCegarLoop]: Abstraction has 4111 states and 5915 transitions. [2021-11-07 13:13:58,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 5915 transitions. [2021-11-07 13:13:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 13:13:58,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:13:58,651 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:13:58,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 13:13:58,652 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:13:58,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:13:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash 972368043, now seen corresponding path program 1 times [2021-11-07 13:13:58,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:13:58,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844430101] [2021-11-07 13:13:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:13:58,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:13:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:13:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 13:13:58,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:13:58,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844430101] [2021-11-07 13:13:58,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844430101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:13:58,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:13:58,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-07 13:13:58,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657520326] [2021-11-07 13:13:58,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:13:58,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 13:13:58,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:13:58,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 13:13:58,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:13:58,879 INFO L87 Difference]: Start difference. First operand 4111 states and 5915 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:13:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:13:59,973 INFO L93 Difference]: Finished difference Result 25221 states and 36317 transitions. [2021-11-07 13:13:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 13:13:59,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 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 158 [2021-11-07 13:13:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:00,001 INFO L225 Difference]: With dead ends: 25221 [2021-11-07 13:14:00,002 INFO L226 Difference]: Without dead ends: 21196 [2021-11-07 13:14:00,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 79.63ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-07 13:14:00,012 INFO L933 BasicCegarLoop]: 3067 mSDtfsCounter, 9039 mSDsluCounter, 11005 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9039 SdHoareTripleChecker+Valid, 14072 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.54ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.16ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:00,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9039 Valid, 14072 Invalid, 190 Unknown, 0 Unchecked, 15.54ms Time], IncrementalHoareTripleChecker [37 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 132.16ms Time] [2021-11-07 13:14:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21196 states. [2021-11-07 13:14:00,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21196 to 8180. [2021-11-07 13:14:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8180 states, 8179 states have (on average 1.4381953784081183) internal successors, (11763), 8179 states have internal predecessors, (11763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8180 states to 8180 states and 11763 transitions. [2021-11-07 13:14:00,423 INFO L78 Accepts]: Start accepts. Automaton has 8180 states and 11763 transitions. Word has length 158 [2021-11-07 13:14:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:00,424 INFO L470 AbstractCegarLoop]: Abstraction has 8180 states and 11763 transitions. [2021-11-07 13:14:00,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8180 states and 11763 transitions. [2021-11-07 13:14:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 13:14:00,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:00,432 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:14:00,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 13:14:00,432 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1848387049, now seen corresponding path program 1 times [2021-11-07 13:14:00,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:00,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934597393] [2021-11-07 13:14:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:00,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 13:14:00,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:00,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934597393] [2021-11-07 13:14:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934597393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:00,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:00,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 13:14:00,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258856792] [2021-11-07 13:14:00,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:00,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:14:00,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:00,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:14:00,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:14:00,635 INFO L87 Difference]: Start difference. First operand 8180 states and 11763 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:02,432 INFO L93 Difference]: Finished difference Result 36292 states and 52227 transitions. [2021-11-07 13:14:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 13:14:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 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 158 [2021-11-07 13:14:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:02,479 INFO L225 Difference]: With dead ends: 36292 [2021-11-07 13:14:02,479 INFO L226 Difference]: Without dead ends: 28258 [2021-11-07 13:14:02,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.45ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:14:02,496 INFO L933 BasicCegarLoop]: 3385 mSDtfsCounter, 3613 mSDsluCounter, 6672 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3613 SdHoareTripleChecker+Valid, 10057 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.32ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.79ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:02,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3613 Valid, 10057 Invalid, 98 Unknown, 0 Unchecked, 9.32ms Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 126.79ms Time] [2021-11-07 13:14:02,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28258 states. [2021-11-07 13:14:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28258 to 8212. [2021-11-07 13:14:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8212 states, 8211 states have (on average 1.4364876385336744) internal successors, (11795), 8211 states have internal predecessors, (11795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8212 states to 8212 states and 11795 transitions. [2021-11-07 13:14:03,138 INFO L78 Accepts]: Start accepts. Automaton has 8212 states and 11795 transitions. Word has length 158 [2021-11-07 13:14:03,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:03,138 INFO L470 AbstractCegarLoop]: Abstraction has 8212 states and 11795 transitions. [2021-11-07 13:14:03,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:03,138 INFO L276 IsEmpty]: Start isEmpty. Operand 8212 states and 11795 transitions. [2021-11-07 13:14:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 13:14:03,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:03,148 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:14:03,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 13:14:03,149 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash -622349658, now seen corresponding path program 1 times [2021-11-07 13:14:03,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:03,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523141660] [2021-11-07 13:14:03,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:03,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:14:04,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:04,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523141660] [2021-11-07 13:14:04,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523141660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:14:04,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398797710] [2021-11-07 13:14:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:04,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:14:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:14:04,391 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) [2021-11-07 13:14:04,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 13:14:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:05,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 13:14:05,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:14:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:14:05,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:14:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 13:14:06,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398797710] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 13:14:06,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-07 13:14:06,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [23, 15] total 44 [2021-11-07 13:14:06,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753510971] [2021-11-07 13:14:06,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:06,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 13:14:06,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:06,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 13:14:06,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 13:14:06,340 INFO L87 Difference]: Start difference. First operand 8212 states and 11795 transitions. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:09,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:09,552 INFO L93 Difference]: Finished difference Result 45798 states and 65907 transitions. [2021-11-07 13:14:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 13:14:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 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 158 [2021-11-07 13:14:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:09,610 INFO L225 Difference]: With dead ends: 45798 [2021-11-07 13:14:09,610 INFO L226 Difference]: Without dead ends: 37732 [2021-11-07 13:14:09,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 1298.74ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 13:14:09,624 INFO L933 BasicCegarLoop]: 5389 mSDtfsCounter, 12314 mSDsluCounter, 21527 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12314 SdHoareTripleChecker+Valid, 26916 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.13ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 268.38ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:09,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12314 Valid, 26916 Invalid, 425 Unknown, 0 Unchecked, 28.13ms Time], IncrementalHoareTripleChecker [39 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 268.38ms Time] [2021-11-07 13:14:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37732 states. [2021-11-07 13:14:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37732 to 8236. [2021-11-07 13:14:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8236 states, 8235 states have (on average 1.4342440801457195) internal successors, (11811), 8235 states have internal predecessors, (11811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:10,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8236 states to 8236 states and 11811 transitions. [2021-11-07 13:14:10,312 INFO L78 Accepts]: Start accepts. Automaton has 8236 states and 11811 transitions. Word has length 158 [2021-11-07 13:14:10,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:10,312 INFO L470 AbstractCegarLoop]: Abstraction has 8236 states and 11811 transitions. [2021-11-07 13:14:10,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:10,312 INFO L276 IsEmpty]: Start isEmpty. Operand 8236 states and 11811 transitions. [2021-11-07 13:14:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 13:14:10,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:10,320 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:14:10,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 13:14:10,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:14:10,535 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1108652355, now seen corresponding path program 1 times [2021-11-07 13:14:10,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:10,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618322721] [2021-11-07 13:14:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:10,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 13:14:11,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:11,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618322721] [2021-11-07 13:14:11,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618322721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:11,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:11,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-07 13:14:11,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608449063] [2021-11-07 13:14:11,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:11,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 13:14:11,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 13:14:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-07 13:14:11,170 INFO L87 Difference]: Start difference. First operand 8236 states and 11811 transitions. Second operand has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:14,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:14:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:14:20,074 INFO L93 Difference]: Finished difference Result 25128 states and 36125 transitions. [2021-11-07 13:14:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 13:14:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 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 166 [2021-11-07 13:14:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:14:20,104 INFO L225 Difference]: With dead ends: 25128 [2021-11-07 13:14:20,104 INFO L226 Difference]: Without dead ends: 17038 [2021-11-07 13:14:20,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1176.92ms TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 13:14:20,118 INFO L933 BasicCegarLoop]: 2575 mSDtfsCounter, 4797 mSDsluCounter, 21880 mSDsCounter, 0 mSdLazyCounter, 4792 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5776.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4797 SdHoareTripleChecker+Valid, 24455 SdHoareTripleChecker+Invalid, 4844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.33ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4792 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6399.65ms IncrementalHoareTripleChecker+Time [2021-11-07 13:14:20,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4797 Valid, 24455 Invalid, 4844 Unknown, 0 Unchecked, 31.33ms Time], IncrementalHoareTripleChecker [51 Valid, 4792 Invalid, 1 Unknown, 0 Unchecked, 6399.65ms Time] [2021-11-07 13:14:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17038 states. [2021-11-07 13:14:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17038 to 8276. [2021-11-07 13:14:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.4331117824773414) internal successors, (11859), 8275 states have internal predecessors, (11859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 11859 transitions. [2021-11-07 13:14:21,004 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 11859 transitions. Word has length 166 [2021-11-07 13:14:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:14:21,004 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 11859 transitions. [2021-11-07 13:14:21,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.75) internal successors, (156), 15 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 11859 transitions. [2021-11-07 13:14:21,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 13:14:21,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:14:21,013 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:14:21,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 13:14:21,014 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:14:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:14:21,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1340947775, now seen corresponding path program 1 times [2021-11-07 13:14:21,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:14:21,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380670945] [2021-11-07 13:14:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:14:21,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:14:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:14:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:14:22,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:14:22,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380670945] [2021-11-07 13:14:22,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380670945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 13:14:22,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:14:22,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-07 13:14:22,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458515041] [2021-11-07 13:14:22,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 13:14:22,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 13:14:22,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:14:22,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 13:14:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-11-07 13:14:22,319 INFO L87 Difference]: Start difference. First operand 8276 states and 11859 transitions. Second operand has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:14:27,373 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:15:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:15:42,076 INFO L93 Difference]: Finished difference Result 240956 states and 350203 transitions. [2021-11-07 13:15:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2021-11-07 13:15:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 0 states have call successors, (0), 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 166 [2021-11-07 13:15:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:15:42,889 INFO L225 Difference]: With dead ends: 240956 [2021-11-07 13:15:42,897 INFO L226 Difference]: Without dead ends: 232826 [2021-11-07 13:15:42,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25490 ImplicationChecksByTransitivity, 16278.48ms TimeCoverageRelationStatistics Valid=7081, Invalid=60259, Unknown=0, NotChecked=0, Total=67340 [2021-11-07 13:15:42,999 INFO L933 BasicCegarLoop]: 12038 mSDtfsCounter, 42711 mSDsluCounter, 224770 mSDsCounter, 0 mSdLazyCounter, 42853 mSolverCounterSat, 687 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30434.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42711 SdHoareTripleChecker+Valid, 236808 SdHoareTripleChecker+Invalid, 43541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 433.39ms SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 42853 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35116.52ms IncrementalHoareTripleChecker+Time [2021-11-07 13:15:42,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42711 Valid, 236808 Invalid, 43541 Unknown, 0 Unchecked, 433.39ms Time], IncrementalHoareTripleChecker [687 Valid, 42853 Invalid, 1 Unknown, 0 Unchecked, 35116.52ms Time] [2021-11-07 13:15:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232826 states. [2021-11-07 13:15:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232826 to 18914. [2021-11-07 13:15:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18914 states, 18913 states have (on average 1.4446676888912389) internal successors, (27323), 18913 states have internal predecessors, (27323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:15:47,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18914 states to 18914 states and 27323 transitions. [2021-11-07 13:15:47,237 INFO L78 Accepts]: Start accepts. Automaton has 18914 states and 27323 transitions. Word has length 166 [2021-11-07 13:15:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:15:47,238 INFO L470 AbstractCegarLoop]: Abstraction has 18914 states and 27323 transitions. [2021-11-07 13:15:47,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 28 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:15:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 18914 states and 27323 transitions. [2021-11-07 13:15:47,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-07 13:15:47,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:15:47,251 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:15:47,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 13:15:47,252 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:15:47,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:15:47,252 INFO L85 PathProgramCache]: Analyzing trace with hash -115618885, now seen corresponding path program 1 times [2021-11-07 13:15:47,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 13:15:47,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016737193] [2021-11-07 13:15:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:15:47,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 13:15:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:15:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:15:47,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 13:15:47,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016737193] [2021-11-07 13:15:47,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016737193] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 13:15:47,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604700376] [2021-11-07 13:15:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:15:47,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:15:47,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:15:47,955 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) [2021-11-07 13:15:47,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 13:15:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:15:48,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 13:15:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:15:49,295 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-07 13:15:49,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 14 [2021-11-07 13:15:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-07 13:15:49,861 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-07 13:15:49,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 23 [2021-11-07 13:15:54,117 INFO L354 Elim1Store]: treesize reduction 70, result has 24.7 percent of original size [2021-11-07 13:15:54,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 58 [2021-11-07 13:15:54,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2021-11-07 13:15:58,588 INFO L354 Elim1Store]: treesize reduction 99, result has 28.8 percent of original size [2021-11-07 13:15:58,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 73 treesize of output 101 [2021-11-07 13:15:58,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-07 13:15:58,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-07 13:15:58,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-07 13:15:58,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884472387] [2021-11-07 13:15:58,593 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-07 13:15:58,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 13:15:58,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 13:15:58,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 13:15:58,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1968, Unknown=2, NotChecked=0, Total=2162 [2021-11-07 13:15:58,595 INFO L87 Difference]: Start difference. First operand 18914 states and 27323 transitions. Second operand has 25 states, 25 states have (on average 6.6) internal successors, (165), 24 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:15:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 13:15:58,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 9110.16ms TimeCoverageRelationStatistics Valid=192, Invalid=1968, Unknown=2, NotChecked=0, Total=2162 [2021-11-07 13:15:58,596 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.01ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 13:15:58,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.01ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 13:15:58,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 13:15:58,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 13:15:58,797 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f775cfd at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-07 13:15:58,799 INFO L158 Benchmark]: Toolchain (without parser) took 139681.49ms. Allocated memory was 100.7MB in the beginning and 5.1GB in the end (delta: 5.0GB). Free memory was 60.1MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2021-11-07 13:15:58,799 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-07 13:15:58,799 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1159.87ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 59.8MB in the beginning and 61.3MB in the end (delta: -1.5MB). Peak memory consumption was 42.9MB. Max. memory is 16.1GB. [2021-11-07 13:15:58,799 INFO L158 Benchmark]: Boogie Procedure Inliner took 201.15ms. Allocated memory is still 123.7MB. Free memory was 61.3MB in the beginning and 64.2MB in the end (delta: -2.8MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. [2021-11-07 13:15:58,799 INFO L158 Benchmark]: Boogie Preprocessor took 125.44ms. Allocated memory is still 123.7MB. Free memory was 64.2MB in the beginning and 41.9MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-07 13:15:58,800 INFO L158 Benchmark]: RCFGBuilder took 4589.65ms. Allocated memory was 123.7MB in the beginning and 358.6MB in the end (delta: 234.9MB). Free memory was 41.9MB in the beginning and 210.6MB in the end (delta: -168.7MB). Peak memory consumption was 78.4MB. Max. memory is 16.1GB. [2021-11-07 13:15:58,800 INFO L158 Benchmark]: TraceAbstraction took 133600.22ms. Allocated memory was 358.6MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 209.7MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2021-11-07 13:15:58,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 83.9MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1159.87ms. Allocated memory was 100.7MB in the beginning and 123.7MB in the end (delta: 23.1MB). Free memory was 59.8MB in the beginning and 61.3MB in the end (delta: -1.5MB). Peak memory consumption was 42.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 201.15ms. Allocated memory is still 123.7MB. Free memory was 61.3MB in the beginning and 64.2MB in the end (delta: -2.8MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 125.44ms. Allocated memory is still 123.7MB. Free memory was 64.2MB in the beginning and 41.9MB in the end (delta: 22.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * RCFGBuilder took 4589.65ms. Allocated memory was 123.7MB in the beginning and 358.6MB in the end (delta: 234.9MB). Free memory was 41.9MB in the beginning and 210.6MB in the end (delta: -168.7MB). Peak memory consumption was 78.4MB. Max. memory is 16.1GB. * TraceAbstraction took 133600.22ms. Allocated memory was 358.6MB in the beginning and 5.1GB in the end (delta: 4.8GB). Free memory was 209.7MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f775cfd de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@5f775cfd: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-07 13:15:58,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 13:16:00,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 13:16:00,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 13:16:00,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 13:16:00,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 13:16:00,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 13:16:00,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 13:16:00,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 13:16:00,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 13:16:00,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 13:16:00,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 13:16:00,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 13:16:00,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 13:16:00,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 13:16:00,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 13:16:00,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 13:16:00,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 13:16:00,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 13:16:00,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 13:16:00,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 13:16:00,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 13:16:00,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 13:16:00,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 13:16:01,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 13:16:01,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 13:16:01,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 13:16:01,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 13:16:01,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 13:16:01,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 13:16:01,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 13:16:01,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 13:16:01,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 13:16:01,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 13:16:01,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 13:16:01,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 13:16:01,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 13:16:01,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 13:16:01,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 13:16:01,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 13:16:01,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 13:16:01,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 13:16:01,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-07 13:16:01,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 13:16:01,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 13:16:01,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 13:16:01,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 13:16:01,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 13:16:01,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 13:16:01,045 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 13:16:01,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 13:16:01,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 13:16:01,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 13:16:01,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 13:16:01,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 13:16:01,046 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 13:16:01,046 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 13:16:01,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 13:16:01,047 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 13:16:01,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 13:16:01,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 13:16:01,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 13:16:01,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 13:16:01,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:16:01,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 13:16:01,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 13:16:01,048 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-11-07 13:16:01,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 13:16:01,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 13:16:01,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 13:16:01,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 13:16:01,319 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 13:16:01,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 13:16:01,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035bf0313/62fb3f617a484a77be1fb959ed0788c4/FLAG8ac043c36 [2021-11-07 13:16:01,942 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 13:16:01,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 13:16:01,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035bf0313/62fb3f617a484a77be1fb959ed0788c4/FLAG8ac043c36 [2021-11-07 13:16:02,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/035bf0313/62fb3f617a484a77be1fb959ed0788c4 [2021-11-07 13:16:02,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 13:16:02,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 13:16:02,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 13:16:02,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 13:16:02,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 13:16:02,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:02" (1/1) ... [2021-11-07 13:16:02,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea26a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:02, skipping insertion in model container [2021-11-07 13:16:02,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:02" (1/1) ... [2021-11-07 13:16:02,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 13:16:02,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 13:16:03,181 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-07 13:16:03,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:16:03,497 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 13:16:03,657 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-11-07 13:16:03,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 13:16:03,855 INFO L208 MainTranslator]: Completed translation [2021-11-07 13:16:03,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03 WrapperNode [2021-11-07 13:16:03,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 13:16:03,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 13:16:03,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 13:16:03,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 13:16:03,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:03,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 13:16:04,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 13:16:04,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 13:16:04,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 13:16:04,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 13:16:04,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 13:16:04,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 13:16:04,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 13:16:04,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (1/1) ... [2021-11-07 13:16:04,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 13:16:04,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 13:16:04,265 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) [2021-11-07 13:16:04,281 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 [2021-11-07 13:16:04,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 13:16:04,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 13:16:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 13:16:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 13:16:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 13:16:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 13:16:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 13:16:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 13:16:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 13:16:04,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 13:16:04,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 13:16:04,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 13:16:04,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 13:16:04,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 13:16:04,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 13:16:04,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 13:16:04,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 13:16:04,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 13:16:04,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 13:16:04,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 13:16:04,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 13:16:04,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 13:16:04,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 13:16:04,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 13:16:04,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 13:16:04,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 13:16:04,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 13:16:04,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 13:16:04,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 13:16:15,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 13:16:15,420 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2021-11-07 13:16:15,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:16:15 BoogieIcfgContainer [2021-11-07 13:16:15,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 13:16:15,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 13:16:15,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 13:16:15,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 13:16:15,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:16:02" (1/3) ... [2021-11-07 13:16:15,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486167ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:16:15, skipping insertion in model container [2021-11-07 13:16:15,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:03" (2/3) ... [2021-11-07 13:16:15,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486167ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:16:15, skipping insertion in model container [2021-11-07 13:16:15,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:16:15" (3/3) ... [2021-11-07 13:16:15,430 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-11-07 13:16:15,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 13:16:15,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 13:16:15,481 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 13:16:15,486 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 [2021-11-07 13:16:15,486 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 13:16:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 13:16:15,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:15,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:15,529 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:15,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2021-11-07 13:16:15,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:15,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599161147] [2021-11-07 13:16:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:15,546 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:15,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:15,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:15,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 13:16:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:16:15,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:16,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:16,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:16,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599161147] [2021-11-07 13:16:16,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599161147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:16,261 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:16,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 13:16:16,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422225685] [2021-11-07 13:16:16,263 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:16,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:16:16,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:16:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:16:16,294 INFO L87 Difference]: Start difference. First operand has 898 states, 896 states have (on average 1.5290178571428572) internal successors, (1370), 897 states have internal predecessors, (1370), 0 states have call successors, (0), 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 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:16,896 INFO L93 Difference]: Finished difference Result 3424 states and 5255 transitions. [2021-11-07 13:16:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:16:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 36 [2021-11-07 13:16:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:16,913 INFO L225 Difference]: With dead ends: 3424 [2021-11-07 13:16:16,914 INFO L226 Difference]: Without dead ends: 2515 [2021-11-07 13:16:16,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.32ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:16:16,919 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 3677 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 398.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3677 SdHoareTripleChecker+Valid, 3786 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.83ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 426.41ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:16,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3677 Valid, 3786 Invalid, 27 Unknown, 0 Unchecked, 14.83ms Time], IncrementalHoareTripleChecker [9 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 426.41ms Time] [2021-11-07 13:16:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-07 13:16:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2515. [2021-11-07 13:16:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 2514 states have (on average 1.4657915672235482) internal successors, (3685), 2514 states have internal predecessors, (3685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3685 transitions. [2021-11-07 13:16:17,007 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3685 transitions. Word has length 36 [2021-11-07 13:16:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:17,008 INFO L470 AbstractCegarLoop]: Abstraction has 2515 states and 3685 transitions. [2021-11-07 13:16:17,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3685 transitions. [2021-11-07 13:16:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 13:16:17,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:17,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:17,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 13:16:17,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:17,221 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:17,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:17,222 INFO L85 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2021-11-07 13:16:17,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:17,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153625161] [2021-11-07 13:16:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:17,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:17,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:17,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:17,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 13:16:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:17,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:16:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:17,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:17,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:17,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153625161] [2021-11-07 13:16:17,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [153625161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:17,832 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:17,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 13:16:17,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446005458] [2021-11-07 13:16:17,833 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:17,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:16:17,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:17,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:16:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:16:17,835 INFO L87 Difference]: Start difference. First operand 2515 states and 3685 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 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) [2021-11-07 13:16:18,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:18,162 INFO L93 Difference]: Finished difference Result 6629 states and 9733 transitions. [2021-11-07 13:16:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:16:18,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 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 40 [2021-11-07 13:16:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:18,177 INFO L225 Difference]: With dead ends: 6629 [2021-11-07 13:16:18,177 INFO L226 Difference]: Without dead ends: 4167 [2021-11-07 13:16:18,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 173.19ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:16:18,182 INFO L933 BasicCegarLoop]: 2487 mSDtfsCounter, 3752 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3752 SdHoareTripleChecker+Valid, 5073 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.82ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.66ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:18,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3752 Valid, 5073 Invalid, 24 Unknown, 0 Unchecked, 7.82ms Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 118.66ms Time] [2021-11-07 13:16:18,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4167 states. [2021-11-07 13:16:18,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4167 to 2518. [2021-11-07 13:16:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.464839094159714) internal successors, (3687), 2517 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3687 transitions. [2021-11-07 13:16:18,297 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3687 transitions. Word has length 40 [2021-11-07 13:16:18,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:18,298 INFO L470 AbstractCegarLoop]: Abstraction has 2518 states and 3687 transitions. [2021-11-07 13:16:18,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 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) [2021-11-07 13:16:18,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3687 transitions. [2021-11-07 13:16:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 13:16:18,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:18,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:18,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 13:16:18,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:18,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:18,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:18,516 INFO L85 PathProgramCache]: Analyzing trace with hash -349053682, now seen corresponding path program 1 times [2021-11-07 13:16:18,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:18,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135924460] [2021-11-07 13:16:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:18,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:18,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:18,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:18,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 13:16:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:16:18,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:19,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:19,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:19,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135924460] [2021-11-07 13:16:19,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135924460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:19,448 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:19,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 13:16:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441349317] [2021-11-07 13:16:19,449 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:19,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 13:16:19,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:19,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 13:16:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 13:16:19,450 INFO L87 Difference]: Start difference. First operand 2518 states and 3687 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:21,063 INFO L93 Difference]: Finished difference Result 7446 states and 10934 transitions. [2021-11-07 13:16:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:16:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 [2021-11-07 13:16:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:21,102 INFO L225 Difference]: With dead ends: 7446 [2021-11-07 13:16:21,103 INFO L226 Difference]: Without dead ends: 4975 [2021-11-07 13:16:21,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 262.27ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-07 13:16:21,110 INFO L933 BasicCegarLoop]: 1227 mSDtfsCounter, 1261 mSDsluCounter, 3616 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1232.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 4843 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1356.47ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:21,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 4843 Invalid, 263 Unknown, 0 Unchecked, 8.12ms Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1356.47ms Time] [2021-11-07 13:16:21,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4975 states. [2021-11-07 13:16:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4975 to 4831. [2021-11-07 13:16:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4737060041407868) internal successors, (7118), 4830 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 7118 transitions. [2021-11-07 13:16:21,274 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 7118 transitions. Word has length 40 [2021-11-07 13:16:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:21,274 INFO L470 AbstractCegarLoop]: Abstraction has 4831 states and 7118 transitions. [2021-11-07 13:16:21,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:21,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 7118 transitions. [2021-11-07 13:16:21,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 13:16:21,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:21,278 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:21,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 13:16:21,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:21,493 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash 2050141973, now seen corresponding path program 1 times [2021-11-07 13:16:21,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:21,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269624707] [2021-11-07 13:16:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:21,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:21,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:21,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 13:16:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:16:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:22,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:22,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:22,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269624707] [2021-11-07 13:16:22,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269624707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:22,490 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:22,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 13:16:22,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172608528] [2021-11-07 13:16:22,490 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:22,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:16:22,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:22,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:16:22,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:16:22,491 INFO L87 Difference]: Start difference. First operand 4831 states and 7118 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:22,962 INFO L93 Difference]: Finished difference Result 11795 states and 17437 transitions. [2021-11-07 13:16:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:16:22,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 13:16:22,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:22,983 INFO L225 Difference]: With dead ends: 11795 [2021-11-07 13:16:22,983 INFO L226 Difference]: Without dead ends: 7017 [2021-11-07 13:16:22,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.68ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:16:22,991 INFO L933 BasicCegarLoop]: 1297 mSDtfsCounter, 629 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 2486 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 306.75ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:22,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 2486 Invalid, 41 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 306.75ms Time] [2021-11-07 13:16:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-11-07 13:16:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 6991. [2021-11-07 13:16:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 1.4804005722460658) internal successors, (10348), 6990 states have internal predecessors, (10348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 10348 transitions. [2021-11-07 13:16:23,164 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 10348 transitions. Word has length 69 [2021-11-07 13:16:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:23,166 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 10348 transitions. [2021-11-07 13:16:23,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 10348 transitions. [2021-11-07 13:16:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 13:16:23,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:23,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:23,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 13:16:23,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:23,404 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:23,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash -643253754, now seen corresponding path program 1 times [2021-11-07 13:16:23,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:23,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20666678] [2021-11-07 13:16:23,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:23,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:23,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:23,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:23,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 13:16:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:16:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:24,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:24,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:24,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20666678] [2021-11-07 13:16:24,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20666678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:24,470 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:24,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 13:16:24,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827989715] [2021-11-07 13:16:24,471 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:24,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:16:24,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:16:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:16:24,472 INFO L87 Difference]: Start difference. First operand 6991 states and 10348 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:24,754 INFO L93 Difference]: Finished difference Result 16727 states and 24734 transitions. [2021-11-07 13:16:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:16:24,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-07 13:16:24,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:24,793 INFO L225 Difference]: With dead ends: 16727 [2021-11-07 13:16:24,794 INFO L226 Difference]: Without dead ends: 9789 [2021-11-07 13:16:24,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.53ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:16:24,805 INFO L933 BasicCegarLoop]: 1953 mSDtfsCounter, 747 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.63ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:24,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 3172 Invalid, 11 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 122.63ms Time] [2021-11-07 13:16:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9789 states. [2021-11-07 13:16:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9789 to 9760. [2021-11-07 13:16:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9760 states, 9759 states have (on average 1.4756634901116918) internal successors, (14401), 9759 states have internal predecessors, (14401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9760 states to 9760 states and 14401 transitions. [2021-11-07 13:16:25,076 INFO L78 Accepts]: Start accepts. Automaton has 9760 states and 14401 transitions. Word has length 75 [2021-11-07 13:16:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:25,076 INFO L470 AbstractCegarLoop]: Abstraction has 9760 states and 14401 transitions. [2021-11-07 13:16:25,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 9760 states and 14401 transitions. [2021-11-07 13:16:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 13:16:25,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:25,085 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:25,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 13:16:25,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:25,301 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2021-11-07 13:16:25,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:25,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390206168] [2021-11-07 13:16:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:25,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:25,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:25,320 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:25,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 13:16:25,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:16:25,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:26,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 13:16:26,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:26,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390206168] [2021-11-07 13:16:26,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390206168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:26,517 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:26,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 13:16:26,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102508379] [2021-11-07 13:16:26,517 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:26,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:16:26,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:16:26,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:16:26,518 INFO L87 Difference]: Start difference. First operand 9760 states and 14401 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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) [2021-11-07 13:16:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:27,583 INFO L93 Difference]: Finished difference Result 24595 states and 36627 transitions. [2021-11-07 13:16:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 13:16:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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 83 [2021-11-07 13:16:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:27,631 INFO L225 Difference]: With dead ends: 24595 [2021-11-07 13:16:27,631 INFO L226 Difference]: Without dead ends: 14888 [2021-11-07 13:16:27,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.58ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:16:27,644 INFO L933 BasicCegarLoop]: 1311 mSDtfsCounter, 2143 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 657.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.97ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 702.09ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:27,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2143 Valid, 2978 Invalid, 109 Unknown, 0 Unchecked, 14.97ms Time], IncrementalHoareTripleChecker [46 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 702.09ms Time] [2021-11-07 13:16:27,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14888 states. [2021-11-07 13:16:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14888 to 14836. [2021-11-07 13:16:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14836 states, 14835 states have (on average 1.4816986855409504) internal successors, (21981), 14835 states have internal predecessors, (21981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14836 states to 14836 states and 21981 transitions. [2021-11-07 13:16:28,053 INFO L78 Accepts]: Start accepts. Automaton has 14836 states and 21981 transitions. Word has length 83 [2021-11-07 13:16:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:28,055 INFO L470 AbstractCegarLoop]: Abstraction has 14836 states and 21981 transitions. [2021-11-07 13:16:28,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 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) [2021-11-07 13:16:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 14836 states and 21981 transitions. [2021-11-07 13:16:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 13:16:28,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:28,065 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:28,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 13:16:28,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:28,279 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2021-11-07 13:16:28,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:28,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425386631] [2021-11-07 13:16:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:28,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:28,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:28,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 13:16:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:28,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 13:16:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:16:28,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:16:29,196 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:29,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425386631] [2021-11-07 13:16:29,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425386631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:29,197 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:29,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 13:16:29,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448807246] [2021-11-07 13:16:29,197 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:29,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 13:16:29,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:29,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 13:16:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:16:29,198 INFO L87 Difference]: Start difference. First operand 14836 states and 21981 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:30,250 INFO L93 Difference]: Finished difference Result 35912 states and 53342 transitions. [2021-11-07 13:16:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 13:16:30,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2021-11-07 13:16:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:30,306 INFO L225 Difference]: With dead ends: 35912 [2021-11-07 13:16:30,306 INFO L226 Difference]: Without dead ends: 28317 [2021-11-07 13:16:30,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.45ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 13:16:30,324 INFO L933 BasicCegarLoop]: 2321 mSDtfsCounter, 1130 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 260.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1130 SdHoareTripleChecker+Valid, 3504 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.35ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 325.15ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:30,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1130 Valid, 3504 Invalid, 73 Unknown, 0 Unchecked, 4.35ms Time], IncrementalHoareTripleChecker [37 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 325.15ms Time] [2021-11-07 13:16:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28317 states. [2021-11-07 13:16:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28317 to 15028. [2021-11-07 13:16:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15028 states, 15027 states have (on average 1.4755440207626274) internal successors, (22173), 15027 states have internal predecessors, (22173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15028 states to 15028 states and 22173 transitions. [2021-11-07 13:16:30,994 INFO L78 Accepts]: Start accepts. Automaton has 15028 states and 22173 transitions. Word has length 84 [2021-11-07 13:16:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:30,995 INFO L470 AbstractCegarLoop]: Abstraction has 15028 states and 22173 transitions. [2021-11-07 13:16:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 15028 states and 22173 transitions. [2021-11-07 13:16:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 13:16:31,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:31,010 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:31,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 13:16:31,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:31,210 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:31,211 INFO L85 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2021-11-07 13:16:31,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:31,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458860894] [2021-11-07 13:16:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:31,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:31,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:31,214 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:31,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 13:16:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:16:31,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:16:32,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 13:16:32,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:32,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458860894] [2021-11-07 13:16:32,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458860894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:32,891 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:32,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 13:16:32,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509601736] [2021-11-07 13:16:32,891 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:32,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 13:16:32,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 13:16:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 13:16:32,892 INFO L87 Difference]: Start difference. First operand 15028 states and 22173 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:37,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:37,519 INFO L93 Difference]: Finished difference Result 43004 states and 63555 transitions. [2021-11-07 13:16:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:16:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 13:16:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:37,578 INFO L225 Difference]: With dead ends: 43004 [2021-11-07 13:16:37,579 INFO L226 Difference]: Without dead ends: 28029 [2021-11-07 13:16:37,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 133.27ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 13:16:37,601 INFO L933 BasicCegarLoop]: 2313 mSDtfsCounter, 3217 mSDsluCounter, 7767 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3466.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3217 SdHoareTripleChecker+Valid, 10080 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.87ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3754.36ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:37,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3217 Valid, 10080 Invalid, 497 Unknown, 0 Unchecked, 10.87ms Time], IncrementalHoareTripleChecker [47 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 3754.36ms Time] [2021-11-07 13:16:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28029 states. [2021-11-07 13:16:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28029 to 14398. [2021-11-07 13:16:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14398 states, 14397 states have (on average 1.4649579773563937) internal successors, (21091), 14397 states have internal predecessors, (21091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14398 states to 14398 states and 21091 transitions. [2021-11-07 13:16:38,260 INFO L78 Accepts]: Start accepts. Automaton has 14398 states and 21091 transitions. Word has length 86 [2021-11-07 13:16:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:38,260 INFO L470 AbstractCegarLoop]: Abstraction has 14398 states and 21091 transitions. [2021-11-07 13:16:38,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 14398 states and 21091 transitions. [2021-11-07 13:16:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 13:16:38,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:38,274 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:38,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 13:16:38,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:38,488 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:38,489 INFO L85 PathProgramCache]: Analyzing trace with hash -265952138, now seen corresponding path program 1 times [2021-11-07 13:16:38,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:38,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018195857] [2021-11-07 13:16:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:38,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:38,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:38,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:38,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 13:16:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:38,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 13:16:38,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:39,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:16:39,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:16:39,859 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:39,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018195857] [2021-11-07 13:16:39,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018195857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:39,859 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:39,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 13:16:39,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947805540] [2021-11-07 13:16:39,860 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:39,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 13:16:39,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:39,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 13:16:39,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 13:16:39,861 INFO L87 Difference]: Start difference. First operand 14398 states and 21091 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:41,094 INFO L93 Difference]: Finished difference Result 36643 states and 53395 transitions. [2021-11-07 13:16:41,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 13:16:41,097 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-11-07 13:16:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:41,130 INFO L225 Difference]: With dead ends: 36643 [2021-11-07 13:16:41,131 INFO L226 Difference]: Without dead ends: 22298 [2021-11-07 13:16:41,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 194.81ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:16:41,148 INFO L933 BasicCegarLoop]: 2065 mSDtfsCounter, 3822 mSDsluCounter, 4121 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 370.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3822 SdHoareTripleChecker+Valid, 6186 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.68ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 405.81ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:41,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3822 Valid, 6186 Invalid, 17 Unknown, 0 Unchecked, 19.68ms Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 405.81ms Time] [2021-11-07 13:16:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22298 states. [2021-11-07 13:16:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22298 to 14422. [2021-11-07 13:16:41,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14422 states, 14421 states have (on average 1.4641841758546563) internal successors, (21115), 14421 states have internal predecessors, (21115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21115 transitions. [2021-11-07 13:16:41,733 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21115 transitions. Word has length 119 [2021-11-07 13:16:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:41,733 INFO L470 AbstractCegarLoop]: Abstraction has 14422 states and 21115 transitions. [2021-11-07 13:16:41,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21115 transitions. [2021-11-07 13:16:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 13:16:41,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:41,746 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:41,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 13:16:41,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:41,974 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash 464660825, now seen corresponding path program 1 times [2021-11-07 13:16:41,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:41,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179076352] [2021-11-07 13:16:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:41,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:41,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:41,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:41,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 13:16:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:42,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 13:16:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:16:42,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:16:43,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:43,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179076352] [2021-11-07 13:16:43,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179076352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:43,681 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:43,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 13:16:43,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324229901] [2021-11-07 13:16:43,681 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:43,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 13:16:43,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:43,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 13:16:43,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:16:43,682 INFO L87 Difference]: Start difference. First operand 14422 states and 21115 transitions. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:46,499 INFO L93 Difference]: Finished difference Result 43979 states and 64011 transitions. [2021-11-07 13:16:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 13:16:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-11-07 13:16:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:46,547 INFO L225 Difference]: With dead ends: 43979 [2021-11-07 13:16:46,548 INFO L226 Difference]: Without dead ends: 29610 [2021-11-07 13:16:46,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 922.57ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-11-07 13:16:46,574 INFO L933 BasicCegarLoop]: 2838 mSDtfsCounter, 5306 mSDsluCounter, 12476 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 856.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5306 SdHoareTripleChecker+Valid, 15314 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.09ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 913.94ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:46,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5306 Valid, 15314 Invalid, 94 Unknown, 0 Unchecked, 13.09ms Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 913.94ms Time] [2021-11-07 13:16:46,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29610 states. [2021-11-07 13:16:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29610 to 14422. [2021-11-07 13:16:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14422 states, 14421 states have (on average 1.4641841758546563) internal successors, (21115), 14421 states have internal predecessors, (21115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14422 states to 14422 states and 21115 transitions. [2021-11-07 13:16:47,214 INFO L78 Accepts]: Start accepts. Automaton has 14422 states and 21115 transitions. Word has length 126 [2021-11-07 13:16:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:47,215 INFO L470 AbstractCegarLoop]: Abstraction has 14422 states and 21115 transitions. [2021-11-07 13:16:47,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14422 states and 21115 transitions. [2021-11-07 13:16:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 13:16:47,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:47,226 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:47,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 13:16:47,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:47,440 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -443712689, now seen corresponding path program 1 times [2021-11-07 13:16:47,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:47,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548312127] [2021-11-07 13:16:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:47,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:47,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:47,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:47,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 13:16:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:48,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 13:16:48,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:16:49,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 13:16:50,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:50,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548312127] [2021-11-07 13:16:50,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548312127] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:50,028 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:50,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 13:16:50,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183184221] [2021-11-07 13:16:50,028 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:50,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 13:16:50,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 13:16:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 13:16:50,029 INFO L87 Difference]: Start difference. First operand 14422 states and 21115 transitions. Second operand has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:53,973 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-07 13:16:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:16:56,332 INFO L93 Difference]: Finished difference Result 53690 states and 78603 transitions. [2021-11-07 13:16:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 13:16:56,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-07 13:16:56,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:16:56,401 INFO L225 Difference]: With dead ends: 53690 [2021-11-07 13:16:56,402 INFO L226 Difference]: Without dead ends: 39321 [2021-11-07 13:16:56,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1173.30ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-07 13:16:56,434 INFO L933 BasicCegarLoop]: 2470 mSDtfsCounter, 11597 mSDsluCounter, 22739 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3699.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11597 SdHoareTripleChecker+Valid, 25209 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.57ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3833.58ms IncrementalHoareTripleChecker+Time [2021-11-07 13:16:56,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11597 Valid, 25209 Invalid, 101 Unknown, 0 Unchecked, 19.57ms Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 3833.58ms Time] [2021-11-07 13:16:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39321 states. [2021-11-07 13:16:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39321 to 14482. [2021-11-07 13:16:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14482 states, 14481 states have (on average 1.4622608935846972) internal successors, (21175), 14481 states have internal predecessors, (21175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14482 states to 14482 states and 21175 transitions. [2021-11-07 13:16:57,278 INFO L78 Accepts]: Start accepts. Automaton has 14482 states and 21175 transitions. Word has length 141 [2021-11-07 13:16:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:16:57,279 INFO L470 AbstractCegarLoop]: Abstraction has 14482 states and 21175 transitions. [2021-11-07 13:16:57,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.083333333333334) internal successors, (145), 12 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:16:57,279 INFO L276 IsEmpty]: Start isEmpty. Operand 14482 states and 21175 transitions. [2021-11-07 13:16:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 13:16:57,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:16:57,292 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:16:57,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 13:16:57,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:16:57,510 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:16:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:16:57,510 INFO L85 PathProgramCache]: Analyzing trace with hash 549404179, now seen corresponding path program 1 times [2021-11-07 13:16:57,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:16:57,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323298478] [2021-11-07 13:16:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:16:57,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:16:57,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:16:57,513 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:16:57,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 13:16:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:16:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 13:16:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:16:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:16:58,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:16:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:16:59,229 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:16:59,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323298478] [2021-11-07 13:16:59,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323298478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:16:59,229 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:16:59,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 13:16:59,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183453568] [2021-11-07 13:16:59,230 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:16:59,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 13:16:59,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:16:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 13:16:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:16:59,231 INFO L87 Difference]: Start difference. First operand 14482 states and 21175 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:17:02,538 INFO L93 Difference]: Finished difference Result 66222 states and 96797 transitions. [2021-11-07 13:17:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 13:17:02,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 13:17:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:17:02,633 INFO L225 Difference]: With dead ends: 66222 [2021-11-07 13:17:02,633 INFO L226 Difference]: Without dead ends: 51793 [2021-11-07 13:17:02,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 329.28ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 13:17:02,670 INFO L933 BasicCegarLoop]: 3437 mSDtfsCounter, 3713 mSDsluCounter, 6753 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 693.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3713 SdHoareTripleChecker+Valid, 10190 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.59ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 769.89ms IncrementalHoareTripleChecker+Time [2021-11-07 13:17:02,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3713 Valid, 10190 Invalid, 98 Unknown, 0 Unchecked, 9.59ms Time], IncrementalHoareTripleChecker [7 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 769.89ms Time] [2021-11-07 13:17:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51793 states. [2021-11-07 13:17:03,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51793 to 14530. [2021-11-07 13:17:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14530 states, 14529 states have (on average 1.4607337050037856) internal successors, (21223), 14529 states have internal predecessors, (21223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:03,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14530 states to 14530 states and 21223 transitions. [2021-11-07 13:17:03,782 INFO L78 Accepts]: Start accepts. Automaton has 14530 states and 21223 transitions. Word has length 143 [2021-11-07 13:17:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:17:03,783 INFO L470 AbstractCegarLoop]: Abstraction has 14530 states and 21223 transitions. [2021-11-07 13:17:03,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 14530 states and 21223 transitions. [2021-11-07 13:17:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 13:17:03,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:17:03,796 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:17:03,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 13:17:04,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:17:04,014 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:17:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:17:04,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1758105866, now seen corresponding path program 1 times [2021-11-07 13:17:04,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:17:04,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843739940] [2021-11-07 13:17:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:17:04,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:17:04,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:17:04,017 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:17:04,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 13:17:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:17:04,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 13:17:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:17:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:17:07,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:17:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:17:09,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:17:09,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843739940] [2021-11-07 13:17:09,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843739940] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:17:09,589 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:17:09,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-07 13:17:09,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853352699] [2021-11-07 13:17:09,589 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:17:09,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 13:17:09,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:17:09,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 13:17:09,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-07 13:17:09,590 INFO L87 Difference]: Start difference. First operand 14530 states and 21223 transitions. Second operand has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:17:19,285 INFO L93 Difference]: Finished difference Result 123871 states and 180787 transitions. [2021-11-07 13:17:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 13:17:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 13:17:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:17:19,497 INFO L225 Difference]: With dead ends: 123871 [2021-11-07 13:17:19,497 INFO L226 Difference]: Without dead ends: 109394 [2021-11-07 13:17:19,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1817.74ms TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-11-07 13:17:19,530 INFO L933 BasicCegarLoop]: 2984 mSDtfsCounter, 16681 mSDsluCounter, 19241 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1804.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16681 SdHoareTripleChecker+Valid, 22225 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.11ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1949.50ms IncrementalHoareTripleChecker+Time [2021-11-07 13:17:19,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16681 Valid, 22225 Invalid, 335 Unknown, 0 Unchecked, 28.11ms Time], IncrementalHoareTripleChecker [47 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 1949.50ms Time] [2021-11-07 13:17:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109394 states. [2021-11-07 13:17:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109394 to 30574. [2021-11-07 13:17:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30574 states, 30573 states have (on average 1.4598829032152554) internal successors, (44633), 30573 states have internal predecessors, (44633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30574 states to 30574 states and 44633 transitions. [2021-11-07 13:17:22,029 INFO L78 Accepts]: Start accepts. Automaton has 30574 states and 44633 transitions. Word has length 143 [2021-11-07 13:17:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:17:22,029 INFO L470 AbstractCegarLoop]: Abstraction has 30574 states and 44633 transitions. [2021-11-07 13:17:22,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.90909090909091) internal successors, (219), 11 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 30574 states and 44633 transitions. [2021-11-07 13:17:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 13:17:22,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:17:22,071 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:17:22,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 13:17:22,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:17:22,290 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:17:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:17:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 691494264, now seen corresponding path program 1 times [2021-11-07 13:17:22,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:17:22,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111359654] [2021-11-07 13:17:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:17:22,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:17:22,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:17:22,294 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:17:22,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 13:17:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:17:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 13:17:23,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:17:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:17:23,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:17:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:17:24,231 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:17:24,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111359654] [2021-11-07 13:17:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111359654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:17:24,231 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:17:24,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 13:17:24,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019877953] [2021-11-07 13:17:24,232 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:17:24,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 13:17:24,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:17:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 13:17:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 13:17:24,233 INFO L87 Difference]: Start difference. First operand 30574 states and 44633 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 13:17:33,010 INFO L93 Difference]: Finished difference Result 151146 states and 220879 transitions. [2021-11-07 13:17:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 13:17:33,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 13:17:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 13:17:33,220 INFO L225 Difference]: With dead ends: 151146 [2021-11-07 13:17:33,220 INFO L226 Difference]: Without dead ends: 120652 [2021-11-07 13:17:33,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 158.77ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 13:17:33,272 INFO L933 BasicCegarLoop]: 2561 mSDtfsCounter, 3663 mSDsluCounter, 3849 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3663 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.33ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 465.66ms IncrementalHoareTripleChecker+Time [2021-11-07 13:17:33,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3663 Valid, 6410 Invalid, 83 Unknown, 0 Unchecked, 9.33ms Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 465.66ms Time] [2021-11-07 13:17:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120652 states. [2021-11-07 13:17:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120652 to 30646. [2021-11-07 13:17:36,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30646 states, 30645 states have (on average 1.4588024147495513) internal successors, (44705), 30645 states have internal predecessors, (44705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30646 states to 30646 states and 44705 transitions. [2021-11-07 13:17:36,321 INFO L78 Accepts]: Start accepts. Automaton has 30646 states and 44705 transitions. Word has length 143 [2021-11-07 13:17:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 13:17:36,323 INFO L470 AbstractCegarLoop]: Abstraction has 30646 states and 44705 transitions. [2021-11-07 13:17:36,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 13:17:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 30646 states and 44705 transitions. [2021-11-07 13:17:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 13:17:36,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 13:17:36,347 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 13:17:36,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 13:17:36,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-07 13:17:36,552 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 13:17:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 13:17:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1910960719, now seen corresponding path program 1 times [2021-11-07 13:17:36,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 13:17:36,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783636016] [2021-11-07 13:17:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 13:17:36,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 13:17:36,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-07 13:17:36,554 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 13:17:36,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 13:17:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 13:17:37,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 13:17:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 13:17:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:17:38,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 13:17:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 13:17:39,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 13:17:39,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783636016] [2021-11-07 13:17:39,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783636016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 13:17:39,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 13:17:39,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-11-07 13:17:39,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70119931] [2021-11-07 13:17:39,696 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-07 13:17:39,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 13:17:39,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 13:17:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 13:17:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-07 13:17:39,697 INFO L87 Difference]: Start difference. First operand 30646 states and 44705 transitions. Second operand has 16 states, 16 states have (on average 9.375) internal successors, (150), 16 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)