./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.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 283b2978ab7cc2aad6d9ef5bd7f2056001c273cafa889d9023ed11b9be13f4c5 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 22:40:46,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:40:46,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:40:46,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:40:46,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:40:46,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:40:46,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:40:46,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:40:46,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:40:46,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:40:46,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:40:46,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:40:46,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:40:46,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:40:46,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:40:46,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:40:46,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:40:46,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:40:46,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:40:46,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:40:46,168 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:40:46,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:40:46,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:40:46,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:40:46,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:40:46,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:40:46,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:40:46,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:40:46,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:40:46,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:40:46,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:40:46,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:40:46,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:40:46,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:40:46,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:40:46,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:40:46,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:40:46,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:40:46,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:40:46,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:40:46,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:40:46,192 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 22:40:46,219 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:40:46,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:40:46,223 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:40:46,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:40:46,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:40:46,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:40:46,225 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:40:46,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:40:46,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:40:46,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:40:46,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:40:46,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:40:46,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:40:46,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:40:46,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:40:46,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:40:46,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:40:46,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:40:46,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:40:46,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:40:46,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 283b2978ab7cc2aad6d9ef5bd7f2056001c273cafa889d9023ed11b9be13f4c5 [2021-11-02 22:40:46,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:40:46,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:40:46,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:40:46,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:40:46,525 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:40:46,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2021-11-02 22:40:46,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea2031ec/44953486018b43bfb6c78f71b50f3931/FLAG12cf9756c [2021-11-02 22:40:47,442 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:40:47,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2021-11-02 22:40:47,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea2031ec/44953486018b43bfb6c78f71b50f3931/FLAG12cf9756c [2021-11-02 22:40:47,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea2031ec/44953486018b43bfb6c78f71b50f3931 [2021-11-02 22:40:47,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:40:47,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:40:47,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:40:47,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:40:47,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:40:47,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:40:47" (1/1) ... [2021-11-02 22:40:47,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cce97af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:47, skipping insertion in model container [2021-11-02 22:40:47,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:40:47" (1/1) ... [2021-11-02 22:40:47,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:40:47,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:40:50,262 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[319471,319484] [2021-11-02 22:40:50,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:40:50,382 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:40:50,803 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[319471,319484] [2021-11-02 22:40:50,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:40:50,942 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:40:50,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50 WrapperNode [2021-11-02 22:40:50,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:40:50,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:40:50,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:40:50,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:40:50,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:51,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:51,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:40:51,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:40:51,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:40:51,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:40:51,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:51,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:51,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:51,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:51,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:52,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:52,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:52,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:40:52,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:40:52,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:40:52,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:40:52,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (1/1) ... [2021-11-02 22:40:52,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:40:52,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:40:52,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:40:52,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:40:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 22:40:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 22:40:52,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:40:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:40:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:40:52,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:40:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 22:40:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 22:40:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:40:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:40:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:40:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_calloc [2021-11-02 22:40:52,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:40:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:40:52,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:40:52,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:40:59,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:40:59,121 INFO L299 CfgBuilder]: Removed 3283 assume(true) statements. [2021-11-02 22:40:59,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:40:59 BoogieIcfgContainer [2021-11-02 22:40:59,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:40:59,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:40:59,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:40:59,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:40:59,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:40:47" (1/3) ... [2021-11-02 22:40:59,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114fdb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:40:59, skipping insertion in model container [2021-11-02 22:40:59,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:40:50" (2/3) ... [2021-11-02 22:40:59,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114fdb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:40:59, skipping insertion in model container [2021-11-02 22:40:59,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:40:59" (3/3) ... [2021-11-02 22:40:59,135 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2021-11-02 22:40:59,139 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:40:59,139 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-11-02 22:40:59,193 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:40:59,199 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:40:59,199 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-11-02 22:40:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 2925 states, 2907 states have (on average 1.370485036119711) internal successors, (3984), 2924 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:40:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 22:40:59,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:40:59,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:40:59,277 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:40:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:40:59,282 INFO L85 PathProgramCache]: Analyzing trace with hash 987291868, now seen corresponding path program 1 times [2021-11-02 22:40:59,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:40:59,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387058128] [2021-11-02 22:40:59,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:40:59,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:40:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:40:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:40:59,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:40:59,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387058128] [2021-11-02 22:40:59,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387058128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:40:59,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:40:59,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:40:59,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190703843] [2021-11-02 22:40:59,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:40:59,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:40:59,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:40:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:40:59,979 INFO L87 Difference]: Start difference. First operand has 2925 states, 2907 states have (on average 1.370485036119711) internal successors, (3984), 2924 states have internal predecessors, (3984), 0 states have call successors, (0), 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 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:02,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:41:09,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:09,829 INFO L93 Difference]: Finished difference Result 5846 states and 7963 transitions. [2021-11-02 22:41:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:41:09,831 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-02 22:41:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:09,862 INFO L225 Difference]: With dead ends: 5846 [2021-11-02 22:41:09,863 INFO L226 Difference]: Without dead ends: 2870 [2021-11-02 22:41:09,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:41:09,881 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3845 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8455.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 3846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.63ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3845 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9496.71ms IncrementalHoareTripleChecker+Time [2021-11-02 22:41:09,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 3846 Unknown, 0 Unchecked, 21.63ms Time], IncrementalHoareTripleChecker [0 Valid, 3845 Invalid, 1 Unknown, 0 Unchecked, 9496.71ms Time] [2021-11-02 22:41:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-11-02 22:41:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2870. [2021-11-02 22:41:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2853 states have (on average 1.3284262180161235) internal successors, (3790), 2869 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 3790 transitions. [2021-11-02 22:41:10,053 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 3790 transitions. Word has length 131 [2021-11-02 22:41:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:10,053 INFO L470 AbstractCegarLoop]: Abstraction has 2870 states and 3790 transitions. [2021-11-02 22:41:10,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 3790 transitions. [2021-11-02 22:41:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 22:41:10,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:41:10,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:10,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:41:10,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:41:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1408896448, now seen corresponding path program 1 times [2021-11-02 22:41:10,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:10,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303181552] [2021-11-02 22:41:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:10,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:10,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:41:10,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:10,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303181552] [2021-11-02 22:41:10,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303181552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:10,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:10,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:10,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641820425] [2021-11-02 22:41:10,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:10,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:10,468 INFO L87 Difference]: Start difference. First operand 2870 states and 3790 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:12,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:41:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:21,777 INFO L93 Difference]: Finished difference Result 5676 states and 7519 transitions. [2021-11-02 22:41:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:21,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-11-02 22:41:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:21,789 INFO L225 Difference]: With dead ends: 5676 [2021-11-02 22:41:21,790 INFO L226 Difference]: Without dead ends: 2874 [2021-11-02 22:41:21,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.89ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:21,795 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 3744 mSDsCounter, 0 mSdLazyCounter, 7574 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9833.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.66ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7574 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11068.60ms IncrementalHoareTripleChecker+Time [2021-11-02 22:41:21,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 7581 Unknown, 0 Unchecked, 25.66ms Time], IncrementalHoareTripleChecker [6 Valid, 7574 Invalid, 1 Unknown, 0 Unchecked, 11068.60ms Time] [2021-11-02 22:41:21,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-11-02 22:41:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2874. [2021-11-02 22:41:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2857 states have (on average 1.327966398319916) internal successors, (3794), 2873 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 3794 transitions. [2021-11-02 22:41:21,939 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 3794 transitions. Word has length 131 [2021-11-02 22:41:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:21,940 INFO L470 AbstractCegarLoop]: Abstraction has 2874 states and 3794 transitions. [2021-11-02 22:41:21,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 3794 transitions. [2021-11-02 22:41:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-02 22:41:21,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:41:21,947 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:21,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:41:21,948 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:41:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1550723198, now seen corresponding path program 1 times [2021-11-02 22:41:21,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:21,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20282888] [2021-11-02 22:41:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:21,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:41:22,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:22,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20282888] [2021-11-02 22:41:22,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20282888] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:22,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:22,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:22,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815082839] [2021-11-02 22:41:22,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:22,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:22,238 INFO L87 Difference]: Start difference. First operand 2874 states and 3794 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:24,277 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:41:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:32,466 INFO L93 Difference]: Finished difference Result 5673 states and 7514 transitions. [2021-11-02 22:41:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:32,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-02 22:41:32,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:32,478 INFO L225 Difference]: With dead ends: 5673 [2021-11-02 22:41:32,478 INFO L226 Difference]: Without dead ends: 2879 [2021-11-02 22:41:32,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.21ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:32,484 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 3744 mSDsCounter, 0 mSdLazyCounter, 7573 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8975.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.56ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7573 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10100.19ms IncrementalHoareTripleChecker+Time [2021-11-02 22:41:32,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 7582 Unknown, 0 Unchecked, 10.56ms Time], IncrementalHoareTripleChecker [8 Valid, 7573 Invalid, 1 Unknown, 0 Unchecked, 10100.19ms Time] [2021-11-02 22:41:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2021-11-02 22:41:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2879. [2021-11-02 22:41:32,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2862 states have (on average 1.3273934311670161) internal successors, (3799), 2878 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 3799 transitions. [2021-11-02 22:41:32,534 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 3799 transitions. Word has length 135 [2021-11-02 22:41:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:32,534 INFO L470 AbstractCegarLoop]: Abstraction has 2879 states and 3799 transitions. [2021-11-02 22:41:32,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 3799 transitions. [2021-11-02 22:41:32,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-02 22:41:32,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:41:32,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:32,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:41:32,539 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:41:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash 257014622, now seen corresponding path program 1 times [2021-11-02 22:41:32,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:32,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251038229] [2021-11-02 22:41:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:32,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:41:32,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:32,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251038229] [2021-11-02 22:41:32,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251038229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:32,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:32,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:32,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502899220] [2021-11-02 22:41:32,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:32,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:32,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:32,779 INFO L87 Difference]: Start difference. First operand 2879 states and 3799 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:34,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:41:44,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:44,564 INFO L93 Difference]: Finished difference Result 7605 states and 10073 transitions. [2021-11-02 22:41:44,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:44,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-02 22:41:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:44,581 INFO L225 Difference]: With dead ends: 7605 [2021-11-02 22:41:44,582 INFO L226 Difference]: Without dead ends: 4830 [2021-11-02 22:41:44,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.71ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:44,587 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2646 mSDsluCounter, 3627 mSDsCounter, 0 mSdLazyCounter, 7502 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10235.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2646 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.85ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 7502 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11570.43ms IncrementalHoareTripleChecker+Time [2021-11-02 22:41:44,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2646 Valid, 0 Invalid, 7513 Unknown, 0 Unchecked, 17.85ms Time], IncrementalHoareTripleChecker [10 Valid, 7502 Invalid, 1 Unknown, 0 Unchecked, 11570.43ms Time] [2021-11-02 22:41:44,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-11-02 22:41:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 4640. [2021-11-02 22:41:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4623 states have (on average 1.335712740644603) internal successors, (6175), 4639 states have internal predecessors, (6175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 6175 transitions. [2021-11-02 22:41:44,673 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 6175 transitions. Word has length 140 [2021-11-02 22:41:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:44,674 INFO L470 AbstractCegarLoop]: Abstraction has 4640 states and 6175 transitions. [2021-11-02 22:41:44,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 6175 transitions. [2021-11-02 22:41:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-02 22:41:44,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:41:44,679 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:44,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:41:44,679 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:41:44,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:44,680 INFO L85 PathProgramCache]: Analyzing trace with hash 252053342, now seen corresponding path program 1 times [2021-11-02 22:41:44,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:44,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718141093] [2021-11-02 22:41:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:44,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:41:44,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:44,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718141093] [2021-11-02 22:41:44,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718141093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:44,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:44,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:41:44,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057315745] [2021-11-02 22:41:44,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:41:44,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:44,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:41:44,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:44,923 INFO L87 Difference]: Start difference. First operand 4640 states and 6175 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:47,007 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:41:56,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:41:56,282 INFO L93 Difference]: Finished difference Result 10239 states and 13716 transitions. [2021-11-02 22:41:56,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:41:56,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-11-02 22:41:56,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:41:56,299 INFO L225 Difference]: With dead ends: 10239 [2021-11-02 22:41:56,299 INFO L226 Difference]: Without dead ends: 5703 [2021-11-02 22:41:56,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.65ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:41:56,306 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1241 mSDsluCounter, 3760 mSDsCounter, 0 mSdLazyCounter, 8592 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9845.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.98ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8592 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11167.22ms IncrementalHoareTripleChecker+Time [2021-11-02 22:41:56,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 0 Invalid, 8594 Unknown, 0 Unchecked, 10.98ms Time], IncrementalHoareTripleChecker [1 Valid, 8592 Invalid, 1 Unknown, 0 Unchecked, 11167.22ms Time] [2021-11-02 22:41:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-11-02 22:41:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5681. [2021-11-02 22:41:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5681 states, 5664 states have (on average 1.347457627118644) internal successors, (7632), 5680 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 7632 transitions. [2021-11-02 22:41:56,437 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 7632 transitions. Word has length 152 [2021-11-02 22:41:56,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:41:56,437 INFO L470 AbstractCegarLoop]: Abstraction has 5681 states and 7632 transitions. [2021-11-02 22:41:56,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 7632 transitions. [2021-11-02 22:41:56,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-02 22:41:56,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:41:56,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:41:56,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:41:56,445 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:41:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:41:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash 268611409, now seen corresponding path program 1 times [2021-11-02 22:41:56,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:41:56,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316120686] [2021-11-02 22:41:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:41:56,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:41:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:41:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:41:56,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:41:56,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316120686] [2021-11-02 22:41:56,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316120686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:41:56,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:41:56,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:41:56,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365989459] [2021-11-02 22:41:56,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:41:56,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:41:56,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:41:56,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:41:56,686 INFO L87 Difference]: Start difference. First operand 5681 states and 7632 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:41:58,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:42:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:09,631 INFO L93 Difference]: Finished difference Result 11270 states and 15167 transitions. [2021-11-02 22:42:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:42:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 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 195 [2021-11-02 22:42:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:09,650 INFO L225 Difference]: With dead ends: 11270 [2021-11-02 22:42:09,650 INFO L226 Difference]: Without dead ends: 5681 [2021-11-02 22:42:09,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.39ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:42:09,658 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 7569 mSDsCounter, 0 mSdLazyCounter, 11365 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11206.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.18ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11365 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12689.53ms IncrementalHoareTripleChecker+Time [2021-11-02 22:42:09,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 11368 Unknown, 0 Unchecked, 20.18ms Time], IncrementalHoareTripleChecker [2 Valid, 11365 Invalid, 1 Unknown, 0 Unchecked, 12689.53ms Time] [2021-11-02 22:42:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5681 states. [2021-11-02 22:42:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 5681. [2021-11-02 22:42:09,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5681 states, 5664 states have (on average 1.3460451977401129) internal successors, (7624), 5680 states have internal predecessors, (7624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 7624 transitions. [2021-11-02 22:42:09,781 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 7624 transitions. Word has length 195 [2021-11-02 22:42:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:09,782 INFO L470 AbstractCegarLoop]: Abstraction has 5681 states and 7624 transitions. [2021-11-02 22:42:09,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 7624 transitions. [2021-11-02 22:42:09,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-02 22:42:09,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:42:09,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:09,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:42:09,788 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:42:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:09,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1785157029, now seen corresponding path program 1 times [2021-11-02 22:42:09,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:09,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071815252] [2021-11-02 22:42:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:09,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:10,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 22:42:10,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:10,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071815252] [2021-11-02 22:42:10,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071815252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:10,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:10,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:42:10,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861133382] [2021-11-02 22:42:10,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:42:10,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:10,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:42:10,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:42:10,162 INFO L87 Difference]: Start difference. First operand 5681 states and 7624 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:12,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:42:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:19,114 INFO L93 Difference]: Finished difference Result 5681 states and 7624 transitions. [2021-11-02 22:42:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:42:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 202 [2021-11-02 22:42:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:19,132 INFO L225 Difference]: With dead ends: 5681 [2021-11-02 22:42:19,133 INFO L226 Difference]: Without dead ends: 5663 [2021-11-02 22:42:19,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.64ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:42:19,134 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2431 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 4894 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7687.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2431 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.88ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4894 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8817.45ms IncrementalHoareTripleChecker+Time [2021-11-02 22:42:19,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2431 Valid, 0 Invalid, 4921 Unknown, 0 Unchecked, 6.88ms Time], IncrementalHoareTripleChecker [26 Valid, 4894 Invalid, 1 Unknown, 0 Unchecked, 8817.45ms Time] [2021-11-02 22:42:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5663 states. [2021-11-02 22:42:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5663 to 5663. [2021-11-02 22:42:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5663 states, 5655 states have (on average 1.3434129089301503) internal successors, (7597), 5662 states have internal predecessors, (7597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5663 states to 5663 states and 7597 transitions. [2021-11-02 22:42:19,317 INFO L78 Accepts]: Start accepts. Automaton has 5663 states and 7597 transitions. Word has length 202 [2021-11-02 22:42:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:19,318 INFO L470 AbstractCegarLoop]: Abstraction has 5663 states and 7597 transitions. [2021-11-02 22:42:19,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5663 states and 7597 transitions. [2021-11-02 22:42:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-02 22:42:19,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:42:19,326 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:19,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:42:19,327 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:42:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1955355332, now seen corresponding path program 1 times [2021-11-02 22:42:19,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:19,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97447478] [2021-11-02 22:42:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:19,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:19,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 22:42:19,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:19,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97447478] [2021-11-02 22:42:19,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97447478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:42:19,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:42:19,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:42:19,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910775100] [2021-11-02 22:42:19,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:42:19,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:42:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:42:19,632 INFO L87 Difference]: Start difference. First operand 5663 states and 7597 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:21,674 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:42:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:42:33,332 INFO L93 Difference]: Finished difference Result 13386 states and 18037 transitions. [2021-11-02 22:42:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:42:33,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-11-02 22:42:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:42:33,352 INFO L225 Difference]: With dead ends: 13386 [2021-11-02 22:42:33,352 INFO L226 Difference]: Without dead ends: 7827 [2021-11-02 22:42:33,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.77ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:42:33,362 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 2762 mSDsluCounter, 3511 mSDsCounter, 0 mSdLazyCounter, 9926 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11701.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2762 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.06ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 9926 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13425.41ms IncrementalHoareTripleChecker+Time [2021-11-02 22:42:33,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2762 Valid, 0 Invalid, 9971 Unknown, 0 Unchecked, 13.06ms Time], IncrementalHoareTripleChecker [44 Valid, 9926 Invalid, 1 Unknown, 0 Unchecked, 13425.41ms Time] [2021-11-02 22:42:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7827 states. [2021-11-02 22:42:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7827 to 7655. [2021-11-02 22:42:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7655 states, 7647 states have (on average 1.3460180462926639) internal successors, (10293), 7654 states have internal predecessors, (10293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7655 states to 7655 states and 10293 transitions. [2021-11-02 22:42:33,510 INFO L78 Accepts]: Start accepts. Automaton has 7655 states and 10293 transitions. Word has length 220 [2021-11-02 22:42:33,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:42:33,512 INFO L470 AbstractCegarLoop]: Abstraction has 7655 states and 10293 transitions. [2021-11-02 22:42:33,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 7655 states and 10293 transitions. [2021-11-02 22:42:33,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-02 22:42:33,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:42:33,525 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:42:33,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:42:33,526 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:42:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:42:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2047183410, now seen corresponding path program 1 times [2021-11-02 22:42:33,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:42:33,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248503541] [2021-11-02 22:42:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:33,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:42:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:42:33,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:42:33,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248503541] [2021-11-02 22:42:33,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248503541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:42:33,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952870875] [2021-11-02 22:42:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:42:33,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:42:33,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:42:33,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:42:33,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:42:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:42:35,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 4153 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:42:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:42:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:42:35,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:42:36,308 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:42:36,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952870875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:42:36,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:42:36,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-02 22:42:36,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022176341] [2021-11-02 22:42:36,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:42:36,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:42:36,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:42:36,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:42:36,310 INFO L87 Difference]: Start difference. First operand 7655 states and 10293 transitions. Second operand has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:42:38,063 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:42:40,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:42:42,605 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:42:44,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:43:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:43:11,070 INFO L93 Difference]: Finished difference Result 15340 states and 20714 transitions. [2021-11-02 22:43:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:43:11,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 0 states have call successors, (0), 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 240 [2021-11-02 22:43:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:43:11,085 INFO L225 Difference]: With dead ends: 15340 [2021-11-02 22:43:11,086 INFO L226 Difference]: Without dead ends: 7754 [2021-11-02 22:43:11,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.76ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:43:11,098 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 11175 mSDsCounter, 0 mSdLazyCounter, 15070 mSolverCounterSat, 131 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30339.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 55.56ms SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 15070 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34193.49ms IncrementalHoareTripleChecker+Time [2021-11-02 22:43:11,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 15203 Unknown, 0 Unchecked, 55.56ms Time], IncrementalHoareTripleChecker [131 Valid, 15070 Invalid, 2 Unknown, 0 Unchecked, 34193.49ms Time] [2021-11-02 22:43:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2021-11-02 22:43:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 7754. [2021-11-02 22:43:11,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7754 states, 7746 states have (on average 1.3415956622773044) internal successors, (10392), 7753 states have internal predecessors, (10392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7754 states to 7754 states and 10392 transitions. [2021-11-02 22:43:11,231 INFO L78 Accepts]: Start accepts. Automaton has 7754 states and 10392 transitions. Word has length 240 [2021-11-02 22:43:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:43:11,231 INFO L470 AbstractCegarLoop]: Abstraction has 7754 states and 10392 transitions. [2021-11-02 22:43:11,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:43:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 7754 states and 10392 transitions. [2021-11-02 22:43:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-02 22:43:11,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:43:11,243 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:43:11,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:43:11,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:11,459 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:43:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:43:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1761088304, now seen corresponding path program 2 times [2021-11-02 22:43:11,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:43:11,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179193081] [2021-11-02 22:43:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:43:11,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:43:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:43:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-02 22:43:11,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:43:11,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179193081] [2021-11-02 22:43:11,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179193081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:43:11,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349512695] [2021-11-02 22:43:11,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:43:11,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:43:11,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:43:11,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:43:11,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:44:18,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:44:18,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:44:18,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 4315 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:44:18,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:44:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-02 22:44:19,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:44:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-02 22:44:20,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349512695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:44:20,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 22:44:20,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-02 22:44:20,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415172063] [2021-11-02 22:44:20,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:44:20,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:44:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=148, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:44:20,600 INFO L87 Difference]: Start difference. First operand 7754 states and 10392 transitions. Second operand has 17 states, 17 states have (on average 13.941176470588236) internal successors, (237), 17 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:22,633 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:44:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:44:45,447 INFO L93 Difference]: Finished difference Result 15507 states and 20871 transitions. [2021-11-02 22:44:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:44:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 13.941176470588236) internal successors, (237), 17 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-11-02 22:44:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:44:45,464 INFO L225 Difference]: With dead ends: 15507 [2021-11-02 22:44:45,464 INFO L226 Difference]: Without dead ends: 7846 [2021-11-02 22:44:45,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 524 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 382.15ms TimeCoverageRelationStatistics Valid=124, Invalid=148, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:44:45,476 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 11172 mSDsCounter, 0 mSdLazyCounter, 15119 mSolverCounterSat, 310 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20844.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.14ms SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 15119 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24427.07ms IncrementalHoareTripleChecker+Time [2021-11-02 22:44:45,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 15430 Unknown, 0 Unchecked, 34.14ms Time], IncrementalHoareTripleChecker [310 Valid, 15119 Invalid, 1 Unknown, 0 Unchecked, 24427.07ms Time] [2021-11-02 22:44:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7846 states. [2021-11-02 22:44:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7846 to 7846. [2021-11-02 22:44:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7846 states, 7838 states have (on average 1.3375861189078846) internal successors, (10484), 7845 states have internal predecessors, (10484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7846 states to 7846 states and 10484 transitions. [2021-11-02 22:44:45,606 INFO L78 Accepts]: Start accepts. Automaton has 7846 states and 10484 transitions. Word has length 267 [2021-11-02 22:44:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:44:45,606 INFO L470 AbstractCegarLoop]: Abstraction has 7846 states and 10484 transitions. [2021-11-02 22:44:45,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.941176470588236) internal successors, (237), 17 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 7846 states and 10484 transitions. [2021-11-02 22:44:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-02 22:44:45,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:44:45,617 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:44:45,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:44:45,843 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,SelfDestructingSolverStorable9 [2021-11-02 22:44:45,844 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:44:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:44:45,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1512455472, now seen corresponding path program 3 times [2021-11-02 22:44:45,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:44:45,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88714380] [2021-11-02 22:44:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:44:45,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:44:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:44:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-02 22:44:46,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:44:46,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88714380] [2021-11-02 22:44:46,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88714380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:44:46,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:44:46,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:44:46,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379446062] [2021-11-02 22:44:46,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:44:46,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:44:46,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:44:46,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:44:46,457 INFO L87 Difference]: Start difference. First operand 7846 states and 10484 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:44:48,499 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:45:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:48,659 INFO L93 Difference]: Finished difference Result 34302 states and 46149 transitions. [2021-11-02 22:45:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:45:48,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 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 287 [2021-11-02 22:45:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:48,709 INFO L225 Difference]: With dead ends: 34302 [2021-11-02 22:45:48,709 INFO L226 Difference]: Without dead ends: 26607 [2021-11-02 22:45:48,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 291.63ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:45:48,730 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 27511 mSDsluCounter, 40223 mSDsCounter, 0 mSdLazyCounter, 49003 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53703.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27511 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 146.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49003 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60521.38ms IncrementalHoareTripleChecker+Time [2021-11-02 22:45:48,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27511 Valid, 0 Invalid, 49004 Unknown, 0 Unchecked, 146.39ms Time], IncrementalHoareTripleChecker [0 Valid, 49003 Invalid, 1 Unknown, 0 Unchecked, 60521.38ms Time] [2021-11-02 22:45:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26607 states. [2021-11-02 22:45:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26607 to 7858. [2021-11-02 22:45:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7858 states, 7850 states have (on average 1.3370700636942676) internal successors, (10496), 7857 states have internal predecessors, (10496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7858 states to 7858 states and 10496 transitions. [2021-11-02 22:45:49,234 INFO L78 Accepts]: Start accepts. Automaton has 7858 states and 10496 transitions. Word has length 287 [2021-11-02 22:45:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:49,234 INFO L470 AbstractCegarLoop]: Abstraction has 7858 states and 10496 transitions. [2021-11-02 22:45:49,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7858 states and 10496 transitions. [2021-11-02 22:45:49,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-02 22:45:49,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:45:49,243 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:49,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:45:49,244 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:45:49,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:49,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2015947751, now seen corresponding path program 1 times [2021-11-02 22:45:49,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:49,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262894443] [2021-11-02 22:45:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:49,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-02 22:45:49,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:49,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262894443] [2021-11-02 22:45:49,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262894443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:49,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:49,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:45:49,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035088359] [2021-11-02 22:45:49,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:45:49,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:45:49,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:45:49,506 INFO L87 Difference]: Start difference. First operand 7858 states and 10496 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:45:51,546 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:46:03,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:03,963 INFO L93 Difference]: Finished difference Result 18976 states and 25492 transitions. [2021-11-02 22:46:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:46:03,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 289 [2021-11-02 22:46:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:03,979 INFO L225 Difference]: With dead ends: 18976 [2021-11-02 22:46:03,979 INFO L226 Difference]: Without dead ends: 11269 [2021-11-02 22:46:03,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.55ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:46:03,989 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3555 mSDsluCounter, 1915 mSDsCounter, 0 mSdLazyCounter, 7515 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12072.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3555 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.28ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 7515 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13909.74ms IncrementalHoareTripleChecker+Time [2021-11-02 22:46:03,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3555 Valid, 0 Invalid, 7570 Unknown, 0 Unchecked, 15.28ms Time], IncrementalHoareTripleChecker [54 Valid, 7515 Invalid, 1 Unknown, 0 Unchecked, 13909.74ms Time] [2021-11-02 22:46:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11269 states. [2021-11-02 22:46:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11269 to 7948. [2021-11-02 22:46:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7948 states, 7940 states have (on average 1.333249370277078) internal successors, (10586), 7947 states have internal predecessors, (10586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7948 states to 7948 states and 10586 transitions. [2021-11-02 22:46:04,394 INFO L78 Accepts]: Start accepts. Automaton has 7948 states and 10586 transitions. Word has length 289 [2021-11-02 22:46:04,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:04,395 INFO L470 AbstractCegarLoop]: Abstraction has 7948 states and 10586 transitions. [2021-11-02 22:46:04,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 7948 states and 10586 transitions. [2021-11-02 22:46:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-02 22:46:04,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:46:04,404 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:04,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:46:04,404 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:46:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:04,405 INFO L85 PathProgramCache]: Analyzing trace with hash 642104609, now seen corresponding path program 1 times [2021-11-02 22:46:04,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:04,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342000060] [2021-11-02 22:46:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:04,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-02 22:46:04,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:04,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342000060] [2021-11-02 22:46:04,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342000060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:46:04,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:46:04,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:46:04,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240079056] [2021-11-02 22:46:04,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:46:04,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:46:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:46:04,715 INFO L87 Difference]: Start difference. First operand 7948 states and 10586 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:06,756 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:46:17,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:17,567 INFO L93 Difference]: Finished difference Result 15745 states and 21012 transitions. [2021-11-02 22:46:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:46:17,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 289 [2021-11-02 22:46:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:17,577 INFO L225 Difference]: With dead ends: 15745 [2021-11-02 22:46:17,577 INFO L226 Difference]: Without dead ends: 7948 [2021-11-02 22:46:17,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.05ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:46:17,587 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 3727 mSDsCounter, 0 mSdLazyCounter, 7517 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10849.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.59ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 7517 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12443.49ms IncrementalHoareTripleChecker+Time [2021-11-02 22:46:17,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 7530 Unknown, 0 Unchecked, 12.59ms Time], IncrementalHoareTripleChecker [12 Valid, 7517 Invalid, 1 Unknown, 0 Unchecked, 12443.49ms Time] [2021-11-02 22:46:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-11-02 22:46:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7948. [2021-11-02 22:46:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7948 states, 7940 states have (on average 1.3311083123425693) internal successors, (10569), 7947 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7948 states to 7948 states and 10569 transitions. [2021-11-02 22:46:17,869 INFO L78 Accepts]: Start accepts. Automaton has 7948 states and 10569 transitions. Word has length 289 [2021-11-02 22:46:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:17,869 INFO L470 AbstractCegarLoop]: Abstraction has 7948 states and 10569 transitions. [2021-11-02 22:46:17,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7948 states and 10569 transitions. [2021-11-02 22:46:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-02 22:46:17,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:46:17,878 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:17,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:46:17,879 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:46:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1847424353, now seen corresponding path program 1 times [2021-11-02 22:46:17,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:17,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782435260] [2021-11-02 22:46:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:17,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-02 22:46:18,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:18,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782435260] [2021-11-02 22:46:18,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782435260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:46:18,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:46:18,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:46:18,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134924445] [2021-11-02 22:46:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:46:18,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:46:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:46:18,356 INFO L87 Difference]: Start difference. First operand 7948 states and 10569 transitions. Second operand has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:20,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:46:35,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:35,472 INFO L93 Difference]: Finished difference Result 15763 states and 21005 transitions. [2021-11-02 22:46:35,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:46:35,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 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 289 [2021-11-02 22:46:35,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:35,483 INFO L225 Difference]: With dead ends: 15763 [2021-11-02 22:46:35,483 INFO L226 Difference]: Without dead ends: 7966 [2021-11-02 22:46:35,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.00ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:46:35,492 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 6791 mSDsCounter, 0 mSdLazyCounter, 11283 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14501.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.22ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 11283 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16664.37ms IncrementalHoareTripleChecker+Time [2021-11-02 22:46:35,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 11290 Unknown, 0 Unchecked, 20.22ms Time], IncrementalHoareTripleChecker [6 Valid, 11283 Invalid, 1 Unknown, 0 Unchecked, 16664.37ms Time] [2021-11-02 22:46:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7966 states. [2021-11-02 22:46:35,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7966 to 7966. [2021-11-02 22:46:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7966 states, 7958 states have (on average 1.330359386780598) internal successors, (10587), 7965 states have internal predecessors, (10587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7966 states to 7966 states and 10587 transitions. [2021-11-02 22:46:35,766 INFO L78 Accepts]: Start accepts. Automaton has 7966 states and 10587 transitions. Word has length 289 [2021-11-02 22:46:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:35,767 INFO L470 AbstractCegarLoop]: Abstraction has 7966 states and 10587 transitions. [2021-11-02 22:46:35,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.5) internal successors, (238), 4 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7966 states and 10587 transitions. [2021-11-02 22:46:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-02 22:46:35,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:46:35,772 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:35,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:46:35,773 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:46:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:35,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2030146337, now seen corresponding path program 1 times [2021-11-02 22:46:35,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:35,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066369223] [2021-11-02 22:46:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:35,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-02 22:46:37,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:37,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066369223] [2021-11-02 22:46:37,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066369223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:37,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217317084] [2021-11-02 22:46:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:37,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 22:46:37,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:46:37,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:46:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:38,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 4645 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:46:38,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-02 22:46:38,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 22:46:38,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217317084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:46:38,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:46:38,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-02 22:46:38,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234466775] [2021-11-02 22:46:38,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:46:38,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:38,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:46:38,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:46:38,612 INFO L87 Difference]: Start difference. First operand 7966 states and 10587 transitions. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:46:40,642 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:47:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:12,919 INFO L93 Difference]: Finished difference Result 27274 states and 36563 transitions. [2021-11-02 22:47:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:47:12,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 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 289 [2021-11-02 22:47:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:12,944 INFO L225 Difference]: With dead ends: 27274 [2021-11-02 22:47:12,944 INFO L226 Difference]: Without dead ends: 19459 [2021-11-02 22:47:12,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 393.45ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:47:12,956 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 11317 mSDsluCounter, 15369 mSDsCounter, 0 mSdLazyCounter, 23131 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28950.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11317 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.25ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 23131 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33142.40ms IncrementalHoareTripleChecker+Time [2021-11-02 22:47:12,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11317 Valid, 0 Invalid, 23197 Unknown, 0 Unchecked, 61.25ms Time], IncrementalHoareTripleChecker [65 Valid, 23131 Invalid, 1 Unknown, 0 Unchecked, 33142.40ms Time] [2021-11-02 22:47:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19459 states. [2021-11-02 22:47:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19459 to 7984. [2021-11-02 22:47:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7976 states have (on average 1.3296138415245737) internal successors, (10605), 7983 states have internal predecessors, (10605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 10605 transitions. [2021-11-02 22:47:13,342 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 10605 transitions. Word has length 289 [2021-11-02 22:47:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:13,343 INFO L470 AbstractCegarLoop]: Abstraction has 7984 states and 10605 transitions. [2021-11-02 22:47:13,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 10605 transitions. [2021-11-02 22:47:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-02 22:47:13,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:47:13,349 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:13,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-02 22:47:13,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:13,550 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:47:13,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2006649372, now seen corresponding path program 1 times [2021-11-02 22:47:13,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:13,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596739769] [2021-11-02 22:47:13,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:13,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-02 22:47:14,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:14,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596739769] [2021-11-02 22:47:14,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596739769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:14,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:14,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:47:14,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225243170] [2021-11-02 22:47:14,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:47:14,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:47:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:47:14,002 INFO L87 Difference]: Start difference. First operand 7984 states and 10605 transitions. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:16,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:47:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:56,021 INFO L93 Difference]: Finished difference Result 38120 states and 50977 transitions. [2021-11-02 22:47:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:47:56,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 299 [2021-11-02 22:47:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:56,058 INFO L225 Difference]: With dead ends: 38120 [2021-11-02 22:47:56,059 INFO L226 Difference]: Without dead ends: 30287 [2021-11-02 22:47:56,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.27ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:47:56,076 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 18040 mSDsluCounter, 16235 mSDsCounter, 0 mSdLazyCounter, 23847 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34460.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18040 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 77.55ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 23847 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40094.47ms IncrementalHoareTripleChecker+Time [2021-11-02 22:47:56,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18040 Valid, 0 Invalid, 23865 Unknown, 0 Unchecked, 77.55ms Time], IncrementalHoareTripleChecker [17 Valid, 23847 Invalid, 1 Unknown, 0 Unchecked, 40094.47ms Time] [2021-11-02 22:47:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30287 states. [2021-11-02 22:47:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30287 to 7993. [2021-11-02 22:47:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7993 states, 7985 states have (on average 1.3292423293675641) internal successors, (10614), 7992 states have internal predecessors, (10614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7993 states to 7993 states and 10614 transitions. [2021-11-02 22:47:56,495 INFO L78 Accepts]: Start accepts. Automaton has 7993 states and 10614 transitions. Word has length 299 [2021-11-02 22:47:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:56,496 INFO L470 AbstractCegarLoop]: Abstraction has 7993 states and 10614 transitions. [2021-11-02 22:47:56,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:56,496 INFO L276 IsEmpty]: Start isEmpty. Operand 7993 states and 10614 transitions. [2021-11-02 22:47:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-11-02 22:47:56,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:47:56,501 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:56,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:47:56,502 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:47:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:56,502 INFO L85 PathProgramCache]: Analyzing trace with hash -152686468, now seen corresponding path program 1 times [2021-11-02 22:47:56,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:56,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630766352] [2021-11-02 22:47:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:56,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-02 22:47:56,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:56,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630766352] [2021-11-02 22:47:56,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630766352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:56,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:56,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:47:56,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27722995] [2021-11-02 22:47:56,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:47:56,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:47:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:47:56,889 INFO L87 Difference]: Start difference. First operand 7993 states and 10614 transitions. Second operand has 6 states, 6 states have (on average 40.5) internal successors, (243), 6 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:47:58,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:48:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:59,964 INFO L93 Difference]: Finished difference Result 53021 states and 70933 transitions. [2021-11-02 22:48:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:48:59,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.5) internal successors, (243), 6 states have internal predecessors, (243), 0 states have call successors, (0), 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 305 [2021-11-02 22:48:59,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:00,024 INFO L225 Difference]: With dead ends: 53021 [2021-11-02 22:49:00,024 INFO L226 Difference]: Without dead ends: 45179 [2021-11-02 22:49:00,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.42ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:49:00,045 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 25197 mSDsluCounter, 27974 mSDsCounter, 0 mSdLazyCounter, 35272 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51046.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25197 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 123.39ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 35272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59675.86ms IncrementalHoareTripleChecker+Time [2021-11-02 22:49:00,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25197 Valid, 0 Invalid, 35301 Unknown, 0 Unchecked, 123.39ms Time], IncrementalHoareTripleChecker [28 Valid, 35272 Invalid, 1 Unknown, 0 Unchecked, 59675.86ms Time] [2021-11-02 22:49:00,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45179 states. [2021-11-02 22:49:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45179 to 7998. [2021-11-02 22:49:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7998 states, 7990 states have (on average 1.3290362953692114) internal successors, (10619), 7997 states have internal predecessors, (10619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7998 states to 7998 states and 10619 transitions. [2021-11-02 22:49:00,725 INFO L78 Accepts]: Start accepts. Automaton has 7998 states and 10619 transitions. Word has length 305 [2021-11-02 22:49:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:00,726 INFO L470 AbstractCegarLoop]: Abstraction has 7998 states and 10619 transitions. [2021-11-02 22:49:00,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.5) internal successors, (243), 6 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 7998 states and 10619 transitions. [2021-11-02 22:49:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-02 22:49:00,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:49:00,732 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:00,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:49:00,732 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:49:00,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:00,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1822350577, now seen corresponding path program 1 times [2021-11-02 22:49:00,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:00,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097890095] [2021-11-02 22:49:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:00,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:01,266 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-02 22:49:01,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:01,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097890095] [2021-11-02 22:49:01,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097890095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:49:01,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:49:01,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:49:01,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315213667] [2021-11-02 22:49:01,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:49:01,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:49:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:49:01,268 INFO L87 Difference]: Start difference. First operand 7998 states and 10619 transitions. Second operand has 9 states, 9 states have (on average 27.11111111111111) internal successors, (244), 9 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:49:03,311 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:50:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:50,253 INFO L93 Difference]: Finished difference Result 39863 states and 53265 transitions. [2021-11-02 22:50:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:50:50,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.11111111111111) internal successors, (244), 9 states have internal predecessors, (244), 0 states have call successors, (0), 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 306 [2021-11-02 22:50:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:50,296 INFO L225 Difference]: With dead ends: 39863 [2021-11-02 22:50:50,296 INFO L226 Difference]: Without dead ends: 32016 [2021-11-02 22:50:50,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 534.88ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:50:50,313 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 38608 mSDsluCounter, 62951 mSDsCounter, 0 mSdLazyCounter, 74367 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89948.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38608 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 254.12ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74367 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104732.19ms IncrementalHoareTripleChecker+Time [2021-11-02 22:50:50,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38608 Valid, 0 Invalid, 74371 Unknown, 0 Unchecked, 254.12ms Time], IncrementalHoareTripleChecker [3 Valid, 74367 Invalid, 1 Unknown, 0 Unchecked, 104732.19ms Time] [2021-11-02 22:50:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32016 states. [2021-11-02 22:50:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32016 to 7998. [2021-11-02 22:50:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7998 states, 7990 states have (on average 1.3290362953692114) internal successors, (10619), 7997 states have internal predecessors, (10619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7998 states to 7998 states and 10619 transitions. [2021-11-02 22:50:51,029 INFO L78 Accepts]: Start accepts. Automaton has 7998 states and 10619 transitions. Word has length 306 [2021-11-02 22:50:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:51,029 INFO L470 AbstractCegarLoop]: Abstraction has 7998 states and 10619 transitions. [2021-11-02 22:50:51,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.11111111111111) internal successors, (244), 9 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7998 states and 10619 transitions. [2021-11-02 22:50:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-02 22:50:51,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:50:51,036 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:51,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:50:51,036 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:50:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash 2033546212, now seen corresponding path program 1 times [2021-11-02 22:50:51,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:51,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551710294] [2021-11-02 22:50:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:51,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-02 22:50:51,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:51,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551710294] [2021-11-02 22:50:51,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551710294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:51,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:51,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:50:51,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443704115] [2021-11-02 22:50:51,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:50:51,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:50:51,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:50:51,421 INFO L87 Difference]: Start difference. First operand 7998 states and 10619 transitions. Second operand has 6 states, 6 states have (on average 41.5) internal successors, (249), 6 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:53,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:52:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:06,705 INFO L93 Difference]: Finished difference Result 31570 states and 42090 transitions. [2021-11-02 22:52:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:52:06,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 41.5) internal successors, (249), 6 states have internal predecessors, (249), 0 states have call successors, (0), 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 311 [2021-11-02 22:52:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:06,745 INFO L225 Difference]: With dead ends: 31570 [2021-11-02 22:52:06,746 INFO L226 Difference]: Without dead ends: 23723 [2021-11-02 22:52:06,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 86.55ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:52:06,764 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 13384 mSDsluCounter, 32624 mSDsCounter, 0 mSdLazyCounter, 43448 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60907.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13384 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 136.41ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 43448 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72082.27ms IncrementalHoareTripleChecker+Time [2021-11-02 22:52:06,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13384 Valid, 0 Invalid, 43471 Unknown, 0 Unchecked, 136.41ms Time], IncrementalHoareTripleChecker [22 Valid, 43448 Invalid, 1 Unknown, 0 Unchecked, 72082.27ms Time] [2021-11-02 22:52:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23723 states. [2021-11-02 22:52:07,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23723 to 8003. [2021-11-02 22:52:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 7995 states have (on average 1.3288305190744216) internal successors, (10624), 8002 states have internal predecessors, (10624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 10624 transitions. [2021-11-02 22:52:07,467 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 10624 transitions. Word has length 311 [2021-11-02 22:52:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:07,468 INFO L470 AbstractCegarLoop]: Abstraction has 8003 states and 10624 transitions. [2021-11-02 22:52:07,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.5) internal successors, (249), 6 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 10624 transitions. [2021-11-02 22:52:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-11-02 22:52:07,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:52:07,474 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:07,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:52:07,474 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:52:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1976406990, now seen corresponding path program 1 times [2021-11-02 22:52:07,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:07,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786583477] [2021-11-02 22:52:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:07,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-02 22:52:07,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:07,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786583477] [2021-11-02 22:52:07,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786583477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:52:07,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:52:07,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:52:07,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566142646] [2021-11-02 22:52:07,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:52:07,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:52:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:52:07,739 INFO L87 Difference]: Start difference. First operand 8003 states and 10624 transitions. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:09,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 22:52:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:52:39,703 INFO L93 Difference]: Finished difference Result 24623 states and 32851 transitions. [2021-11-02 22:52:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:52:39,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 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 314 [2021-11-02 22:52:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:52:39,722 INFO L225 Difference]: With dead ends: 24623 [2021-11-02 22:52:39,722 INFO L226 Difference]: Without dead ends: 16771 [2021-11-02 22:52:39,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.71ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:52:39,731 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 6567 mSDsluCounter, 9479 mSDsCounter, 0 mSdLazyCounter, 15571 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25554.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6567 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.16ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15571 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30108.91ms IncrementalHoareTripleChecker+Time [2021-11-02 22:52:39,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6567 Valid, 0 Invalid, 15581 Unknown, 0 Unchecked, 40.16ms Time], IncrementalHoareTripleChecker [9 Valid, 15571 Invalid, 1 Unknown, 0 Unchecked, 30108.91ms Time] [2021-11-02 22:52:39,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16771 states. [2021-11-02 22:52:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16771 to 8021. [2021-11-02 22:52:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8021 states, 8013 states have (on average 1.3280918507425434) internal successors, (10642), 8020 states have internal predecessors, (10642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8021 states to 8021 states and 10642 transitions. [2021-11-02 22:52:40,455 INFO L78 Accepts]: Start accepts. Automaton has 8021 states and 10642 transitions. Word has length 314 [2021-11-02 22:52:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:52:40,456 INFO L470 AbstractCegarLoop]: Abstraction has 8021 states and 10642 transitions. [2021-11-02 22:52:40,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:40,456 INFO L276 IsEmpty]: Start isEmpty. Operand 8021 states and 10642 transitions. [2021-11-02 22:52:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-02 22:52:40,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 22:52:40,461 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:40,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:52:40,461 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2021-11-02 22:52:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:40,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1692092372, now seen corresponding path program 1 times [2021-11-02 22:52:40,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:40,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707820458] [2021-11-02 22:52:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:40,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-02 22:52:40,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:40,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707820458] [2021-11-02 22:52:40,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707820458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:52:40,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:52:40,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:52:40,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741330208] [2021-11-02 22:52:40,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:52:40,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:40,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:52:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:52:40,953 INFO L87 Difference]: Start difference. First operand 8021 states and 10642 transitions. Second operand has 8 states, 8 states have (on average 31.875) internal successors, (255), 8 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:52:43,238 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15