./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.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 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 15:26:03,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 15:26:03,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 15:26:03,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 15:26:03,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 15:26:03,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 15:26:03,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 15:26:03,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 15:26:03,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 15:26:03,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 15:26:03,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 15:26:03,216 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 15:26:03,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 15:26:03,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 15:26:03,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 15:26:03,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 15:26:03,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 15:26:03,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 15:26:03,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 15:26:03,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 15:26:03,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 15:26:03,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 15:26:03,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 15:26:03,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 15:26:03,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 15:26:03,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 15:26:03,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 15:26:03,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 15:26:03,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 15:26:03,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 15:26:03,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 15:26:03,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 15:26:03,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 15:26:03,245 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 15:26:03,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 15:26:03,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 15:26:03,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 15:26:03,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 15:26:03,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 15:26:03,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 15:26:03,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 15:26:03,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 15:26:03,277 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 15:26:03,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 15:26:03,278 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 15:26:03,278 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 15:26:03,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 15:26:03,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 15:26:03,280 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 15:26:03,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 15:26:03,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 15:26:03,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 15:26:03,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 15:26:03,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 15:26:03,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 15:26:03,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 15:26:03,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 15:26:03,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 15:26:03,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 15:26:03,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 15:26:03,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 15:26:03,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:26:03,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 15:26:03,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 15:26:03,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 15:26:03,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 15:26:03,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 15:26:03,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 15:26:03,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 15:26:03,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 15:26:03,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 15:26:03,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2021-11-06 15:26:03,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 15:26:03,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 15:26:03,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 15:26:03,461 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 15:26:03,461 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 15:26:03,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-06 15:26:03,506 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30254502d/94d3b742c71e4023bfda95c8f16256f9/FLAGc1d274ab6 [2021-11-06 15:26:04,028 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 15:26:04,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-06 15:26:04,047 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30254502d/94d3b742c71e4023bfda95c8f16256f9/FLAGc1d274ab6 [2021-11-06 15:26:04,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30254502d/94d3b742c71e4023bfda95c8f16256f9 [2021-11-06 15:26:04,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 15:26:04,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 15:26:04,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 15:26:04,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 15:26:04,545 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 15:26:04,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:26:04" (1/1) ... [2021-11-06 15:26:04,547 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38a38c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:04, skipping insertion in model container [2021-11-06 15:26:04,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 03:26:04" (1/1) ... [2021-11-06 15:26:04,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 15:26:04,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 15:26:05,243 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-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-06 15:26:05,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:26:05,276 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 15:26:05,450 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-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-11-06 15:26:05,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 15:26:05,487 INFO L208 MainTranslator]: Completed translation [2021-11-06 15:26:05,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05 WrapperNode [2021-11-06 15:26:05,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 15:26:05,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 15:26:05,490 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 15:26:05,490 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 15:26:05,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 15:26:05,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 15:26:05,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 15:26:05,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 15:26:05,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 15:26:05,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 15:26:05,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 15:26:05,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 15:26:05,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (1/1) ... [2021-11-06 15:26:05,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 15:26:05,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:05,868 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 15:26:05,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 15:26:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 15:26:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 15:26:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 15:26:05,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 15:26:05,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 15:26:18,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 15:26:18,327 INFO L299 CfgBuilder]: Removed 759 assume(true) statements. [2021-11-06 15:26:18,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:26:18 BoogieIcfgContainer [2021-11-06 15:26:18,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 15:26:18,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 15:26:18,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 15:26:18,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 15:26:18,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 03:26:04" (1/3) ... [2021-11-06 15:26:18,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4e2741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:26:18, skipping insertion in model container [2021-11-06 15:26:18,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 03:26:05" (2/3) ... [2021-11-06 15:26:18,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4e2741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 03:26:18, skipping insertion in model container [2021-11-06 15:26:18,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 03:26:18" (3/3) ... [2021-11-06 15:26:18,335 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-06 15:26:18,341 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 15:26:18,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-06 15:26:18,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 15:26:18,386 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 15:26:18,387 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-06 15:26:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 868 states have (on average 1.4688940092165899) internal successors, (1275), 879 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-06 15:26:18,423 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:18,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:18,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1003833369, now seen corresponding path program 1 times [2021-11-06 15:26:18,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:18,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081021305] [2021-11-06 15:26:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:18,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:26:18,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:18,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081021305] [2021-11-06 15:26:18,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081021305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:18,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:18,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:26:18,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47110247] [2021-11-06 15:26:18,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-06 15:26:18,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-06 15:26:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 15:26:18,875 INFO L87 Difference]: Start difference. First operand has 880 states, 868 states have (on average 1.4688940092165899) internal successors, (1275), 879 states have internal predecessors, (1275), 0 states have call successors, (0), 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 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:18,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:18,931 INFO L93 Difference]: Finished difference Result 1756 states and 2545 transitions. [2021-11-06 15:26:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-06 15:26:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-06 15:26:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:18,945 INFO L225 Difference]: With dead ends: 1756 [2021-11-06 15:26:18,945 INFO L226 Difference]: Without dead ends: 868 [2021-11-06 15:26:18,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-06 15:26:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-06 15:26:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2021-11-06 15:26:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 857 states have (on average 1.3990665110851808) internal successors, (1199), 867 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1199 transitions. [2021-11-06 15:26:19,029 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1199 transitions. Word has length 54 [2021-11-06 15:26:19,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:19,029 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1199 transitions. [2021-11-06 15:26:19,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1199 transitions. [2021-11-06 15:26:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-06 15:26:19,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:19,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:19,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 15:26:19,032 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash 527454111, now seen corresponding path program 1 times [2021-11-06 15:26:19,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:19,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484424060] [2021-11-06 15:26:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:19,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:26:19,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:19,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484424060] [2021-11-06 15:26:19,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484424060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:19,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:19,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:19,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555965278] [2021-11-06 15:26:19,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:19,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:19,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:19,145 INFO L87 Difference]: Start difference. First operand 868 states and 1199 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:19,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:19,321 INFO L93 Difference]: Finished difference Result 1735 states and 2407 transitions. [2021-11-06 15:26:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-06 15:26:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:19,325 INFO L225 Difference]: With dead ends: 1735 [2021-11-06 15:26:19,325 INFO L226 Difference]: Without dead ends: 908 [2021-11-06 15:26:19,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-11-06 15:26:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 908. [2021-11-06 15:26:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 897 states have (on average 1.399108138238573) internal successors, (1255), 907 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:19,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1255 transitions. [2021-11-06 15:26:19,340 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1255 transitions. Word has length 54 [2021-11-06 15:26:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:19,341 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1255 transitions. [2021-11-06 15:26:19,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1255 transitions. [2021-11-06 15:26:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 15:26:19,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:19,343 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:19,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 15:26:19,343 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1351840109, now seen corresponding path program 1 times [2021-11-06 15:26:19,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:19,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837871208] [2021-11-06 15:26:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:19,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 15:26:19,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:19,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837871208] [2021-11-06 15:26:19,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837871208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:19,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:19,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:19,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777258134] [2021-11-06 15:26:19,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:19,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:19,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:19,515 INFO L87 Difference]: Start difference. First operand 908 states and 1255 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:21,890 INFO L93 Difference]: Finished difference Result 1864 states and 2615 transitions. [2021-11-06 15:26:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:21,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-06 15:26:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:21,895 INFO L225 Difference]: With dead ends: 1864 [2021-11-06 15:26:21,895 INFO L226 Difference]: Without dead ends: 997 [2021-11-06 15:26:21,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-06 15:26:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-11-06 15:26:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 986 states have (on average 1.3935091277890466) internal successors, (1374), 996 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1374 transitions. [2021-11-06 15:26:21,912 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1374 transitions. Word has length 81 [2021-11-06 15:26:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:21,912 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1374 transitions. [2021-11-06 15:26:21,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1374 transitions. [2021-11-06 15:26:21,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-06 15:26:21,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:21,914 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:21,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 15:26:21,914 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1079749019, now seen corresponding path program 1 times [2021-11-06 15:26:21,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:21,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17335523] [2021-11-06 15:26:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:21,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:22,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:26:22,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:22,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17335523] [2021-11-06 15:26:22,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17335523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:22,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:22,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:22,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042791719] [2021-11-06 15:26:22,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:22,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:22,008 INFO L87 Difference]: Start difference. First operand 997 states and 1374 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:33,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:33,311 INFO L93 Difference]: Finished difference Result 1957 states and 2708 transitions. [2021-11-06 15:26:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-06 15:26:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:33,314 INFO L225 Difference]: With dead ends: 1957 [2021-11-06 15:26:33,315 INFO L226 Difference]: Without dead ends: 1001 [2021-11-06 15:26:33,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-11-06 15:26:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 1001. [2021-11-06 15:26:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 990 states have (on average 1.391919191919192) internal successors, (1378), 1000 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1378 transitions. [2021-11-06 15:26:33,333 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1378 transitions. Word has length 85 [2021-11-06 15:26:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:33,334 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 1378 transitions. [2021-11-06 15:26:33,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1378 transitions. [2021-11-06 15:26:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-06 15:26:33,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:33,336 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:33,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 15:26:33,336 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:33,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1079808601, now seen corresponding path program 1 times [2021-11-06 15:26:33,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:33,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689724240] [2021-11-06 15:26:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:33,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:26:33,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:33,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689724240] [2021-11-06 15:26:33,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689724240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:33,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:33,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:33,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116264978] [2021-11-06 15:26:33,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:33,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:33,566 INFO L87 Difference]: Start difference. First operand 1001 states and 1378 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:35,793 INFO L93 Difference]: Finished difference Result 1938 states and 2683 transitions. [2021-11-06 15:26:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:35,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-06 15:26:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:35,801 INFO L225 Difference]: With dead ends: 1938 [2021-11-06 15:26:35,801 INFO L226 Difference]: Without dead ends: 1922 [2021-11-06 15:26:35,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-11-06 15:26:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1917. [2021-11-06 15:26:35,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1906 states have (on average 1.3961175236096537) internal successors, (2661), 1916 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2661 transitions. [2021-11-06 15:26:35,838 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2661 transitions. Word has length 85 [2021-11-06 15:26:35,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:35,839 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2661 transitions. [2021-11-06 15:26:35,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2661 transitions. [2021-11-06 15:26:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-06 15:26:35,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:35,843 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:35,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 15:26:35,844 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash 55898786, now seen corresponding path program 1 times [2021-11-06 15:26:35,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:35,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073941164] [2021-11-06 15:26:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:35,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-06 15:26:35,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:36,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073941164] [2021-11-06 15:26:36,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073941164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:36,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:36,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:36,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711668040] [2021-11-06 15:26:36,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:36,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:36,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:36,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:36,002 INFO L87 Difference]: Start difference. First operand 1917 states and 2661 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:38,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:38,386 INFO L93 Difference]: Finished difference Result 3971 states and 5580 transitions. [2021-11-06 15:26:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:38,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-06 15:26:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:38,393 INFO L225 Difference]: With dead ends: 3971 [2021-11-06 15:26:38,393 INFO L226 Difference]: Without dead ends: 2095 [2021-11-06 15:26:38,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-11-06 15:26:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 2095. [2021-11-06 15:26:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2084 states have (on average 1.3910748560460653) internal successors, (2899), 2094 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 2899 transitions. [2021-11-06 15:26:38,431 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 2899 transitions. Word has length 100 [2021-11-06 15:26:38,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:38,432 INFO L470 AbstractCegarLoop]: Abstraction has 2095 states and 2899 transitions. [2021-11-06 15:26:38,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:38,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 2899 transitions. [2021-11-06 15:26:38,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-06 15:26:38,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:38,434 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-06 15:26:38,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 15:26:38,434 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:38,434 INFO L85 PathProgramCache]: Analyzing trace with hash 164948024, now seen corresponding path program 1 times [2021-11-06 15:26:38,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:38,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407568220] [2021-11-06 15:26:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:38,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:38,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 15:26:38,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:38,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407568220] [2021-11-06 15:26:38,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407568220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:38,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:38,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:26:38,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429732553] [2021-11-06 15:26:38,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:38,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:38,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:38,535 INFO L87 Difference]: Start difference. First operand 2095 states and 2899 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:40,724 INFO L93 Difference]: Finished difference Result 5147 states and 7088 transitions. [2021-11-06 15:26:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:26:40,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 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 113 [2021-11-06 15:26:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:40,733 INFO L225 Difference]: With dead ends: 5147 [2021-11-06 15:26:40,733 INFO L226 Difference]: Without dead ends: 3093 [2021-11-06 15:26:40,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-11-06 15:26:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2099. [2021-11-06 15:26:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2088 states have (on average 1.3903256704980842) internal successors, (2903), 2098 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 2903 transitions. [2021-11-06 15:26:40,783 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 2903 transitions. Word has length 113 [2021-11-06 15:26:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:40,800 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 2903 transitions. [2021-11-06 15:26:40,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 2903 transitions. [2021-11-06 15:26:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-06 15:26:40,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:40,802 INFO L513 BasicCegarLoop]: trace histogram [4, 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] [2021-11-06 15:26:40,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 15:26:40,803 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 86394116, now seen corresponding path program 1 times [2021-11-06 15:26:40,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:40,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914301992] [2021-11-06 15:26:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:40,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-06 15:26:40,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:40,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914301992] [2021-11-06 15:26:40,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914301992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:40,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:40,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:40,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126320734] [2021-11-06 15:26:40,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:40,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:40,933 INFO L87 Difference]: Start difference. First operand 2099 states and 2903 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:43,341 INFO L93 Difference]: Finished difference Result 4335 states and 6064 transitions. [2021-11-06 15:26:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:43,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 118 [2021-11-06 15:26:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:43,347 INFO L225 Difference]: With dead ends: 4335 [2021-11-06 15:26:43,347 INFO L226 Difference]: Without dead ends: 2277 [2021-11-06 15:26:43,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-11-06 15:26:43,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2277. [2021-11-06 15:26:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2266 states have (on average 1.3861429832303618) internal successors, (3141), 2276 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3141 transitions. [2021-11-06 15:26:43,411 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3141 transitions. Word has length 118 [2021-11-06 15:26:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:43,412 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 3141 transitions. [2021-11-06 15:26:43,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3141 transitions. [2021-11-06 15:26:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-06 15:26:43,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:43,414 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:43,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 15:26:43,414 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:43,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1771424647, now seen corresponding path program 1 times [2021-11-06 15:26:43,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:43,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502355693] [2021-11-06 15:26:43,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:43,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 15:26:43,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:43,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502355693] [2021-11-06 15:26:43,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502355693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:43,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:43,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-06 15:26:43,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754347188] [2021-11-06 15:26:43,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:43,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:43,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:43,555 INFO L87 Difference]: Start difference. First operand 2277 states and 3141 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:43,717 INFO L93 Difference]: Finished difference Result 4513 states and 6234 transitions. [2021-11-06 15:26:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:43,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 142 [2021-11-06 15:26:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:43,723 INFO L225 Difference]: With dead ends: 4513 [2021-11-06 15:26:43,723 INFO L226 Difference]: Without dead ends: 2277 [2021-11-06 15:26:43,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-11-06 15:26:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2277. [2021-11-06 15:26:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2266 states have (on average 1.3433362753751104) internal successors, (3044), 2276 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3044 transitions. [2021-11-06 15:26:43,769 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3044 transitions. Word has length 142 [2021-11-06 15:26:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:43,770 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 3044 transitions. [2021-11-06 15:26:43,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3044 transitions. [2021-11-06 15:26:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-06 15:26:43,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:43,772 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:43,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 15:26:43,772 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1821942775, now seen corresponding path program 1 times [2021-11-06 15:26:43,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:43,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040690262] [2021-11-06 15:26:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:43,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 15:26:43,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:43,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040690262] [2021-11-06 15:26:43,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040690262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:43,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:43,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:26:43,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428829229] [2021-11-06 15:26:43,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:43,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:43,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:43,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:43,871 INFO L87 Difference]: Start difference. First operand 2277 states and 3044 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:46,146 INFO L93 Difference]: Finished difference Result 6081 states and 8078 transitions. [2021-11-06 15:26:46,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:26:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 142 [2021-11-06 15:26:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:46,156 INFO L225 Difference]: With dead ends: 6081 [2021-11-06 15:26:46,156 INFO L226 Difference]: Without dead ends: 3845 [2021-11-06 15:26:46,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3845 states. [2021-11-06 15:26:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3845 to 2281. [2021-11-06 15:26:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2270 states have (on average 1.3427312775330396) internal successors, (3048), 2280 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3048 transitions. [2021-11-06 15:26:46,217 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3048 transitions. Word has length 142 [2021-11-06 15:26:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:46,217 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 3048 transitions. [2021-11-06 15:26:46,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3048 transitions. [2021-11-06 15:26:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 15:26:46,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:46,220 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:46,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 15:26:46,220 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:46,221 INFO L85 PathProgramCache]: Analyzing trace with hash -832104116, now seen corresponding path program 1 times [2021-11-06 15:26:46,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:46,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314055815] [2021-11-06 15:26:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:46,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 15:26:46,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:46,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314055815] [2021-11-06 15:26:46,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314055815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:46,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:46,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:46,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803922755] [2021-11-06 15:26:46,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:46,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:46,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:46,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:46,349 INFO L87 Difference]: Start difference. First operand 2281 states and 3048 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:46,391 INFO L93 Difference]: Finished difference Result 4523 states and 6052 transitions. [2021-11-06 15:26:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:46,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 168 [2021-11-06 15:26:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:46,397 INFO L225 Difference]: With dead ends: 4523 [2021-11-06 15:26:46,397 INFO L226 Difference]: Without dead ends: 2283 [2021-11-06 15:26:46,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2021-11-06 15:26:46,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2283. [2021-11-06 15:26:46,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2272 states have (on average 1.3424295774647887) internal successors, (3050), 2282 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3050 transitions. [2021-11-06 15:26:46,446 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3050 transitions. Word has length 168 [2021-11-06 15:26:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:46,446 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3050 transitions. [2021-11-06 15:26:46,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3050 transitions. [2021-11-06 15:26:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 15:26:46,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:46,449 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:46,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 15:26:46,449 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:46,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1341577206, now seen corresponding path program 1 times [2021-11-06 15:26:46,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:46,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689707812] [2021-11-06 15:26:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:46,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 15:26:46,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:46,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689707812] [2021-11-06 15:26:46,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689707812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:46,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:46,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:46,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846383082] [2021-11-06 15:26:46,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:46,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:46,637 INFO L87 Difference]: Start difference. First operand 2283 states and 3050 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:46,700 INFO L93 Difference]: Finished difference Result 4527 states and 6056 transitions. [2021-11-06 15:26:46,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 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 168 [2021-11-06 15:26:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:46,707 INFO L225 Difference]: With dead ends: 4527 [2021-11-06 15:26:46,707 INFO L226 Difference]: Without dead ends: 2285 [2021-11-06 15:26:46,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-11-06 15:26:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2285. [2021-11-06 15:26:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2274 states have (on average 1.3421284080914688) internal successors, (3052), 2284 states have internal predecessors, (3052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 3052 transitions. [2021-11-06 15:26:46,767 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 3052 transitions. Word has length 168 [2021-11-06 15:26:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:46,768 INFO L470 AbstractCegarLoop]: Abstraction has 2285 states and 3052 transitions. [2021-11-06 15:26:46,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 3052 transitions. [2021-11-06 15:26:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 15:26:46,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:46,771 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:46,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 15:26:46,771 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1147951756, now seen corresponding path program 1 times [2021-11-06 15:26:46,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:46,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116058367] [2021-11-06 15:26:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:46,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 15:26:46,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:46,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116058367] [2021-11-06 15:26:46,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116058367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:46,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:46,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:26:46,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51041719] [2021-11-06 15:26:46,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:46,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:46,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:46,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:46,916 INFO L87 Difference]: Start difference. First operand 2285 states and 3052 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:46,970 INFO L93 Difference]: Finished difference Result 4535 states and 6064 transitions. [2021-11-06 15:26:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:26:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 168 [2021-11-06 15:26:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:46,977 INFO L225 Difference]: With dead ends: 4535 [2021-11-06 15:26:46,977 INFO L226 Difference]: Without dead ends: 2291 [2021-11-06 15:26:46,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-11-06 15:26:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2289. [2021-11-06 15:26:47,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2278 states have (on average 1.3415276558384548) internal successors, (3056), 2288 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3056 transitions. [2021-11-06 15:26:47,023 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3056 transitions. Word has length 168 [2021-11-06 15:26:47,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:47,024 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 3056 transitions. [2021-11-06 15:26:47,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3056 transitions. [2021-11-06 15:26:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-06 15:26:47,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:47,026 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:47,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-06 15:26:47,026 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:47,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1288500366, now seen corresponding path program 1 times [2021-11-06 15:26:47,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:47,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374417548] [2021-11-06 15:26:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:47,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-06 15:26:47,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:47,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374417548] [2021-11-06 15:26:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374417548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:47,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:47,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 15:26:47,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699730010] [2021-11-06 15:26:47,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:26:47,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:26:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 15:26:47,224 INFO L87 Difference]: Start difference. First operand 2289 states and 3056 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:47,599 INFO L93 Difference]: Finished difference Result 6595 states and 8814 transitions. [2021-11-06 15:26:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:26:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-11-06 15:26:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:47,607 INFO L225 Difference]: With dead ends: 6595 [2021-11-06 15:26:47,607 INFO L226 Difference]: Without dead ends: 4329 [2021-11-06 15:26:47,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:26:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2021-11-06 15:26:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 2289. [2021-11-06 15:26:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2278 states have (on average 1.3410886742756805) internal successors, (3055), 2288 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3055 transitions. [2021-11-06 15:26:47,663 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3055 transitions. Word has length 168 [2021-11-06 15:26:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:47,663 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 3055 transitions. [2021-11-06 15:26:47,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3055 transitions. [2021-11-06 15:26:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-06 15:26:47,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:47,665 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:47,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-06 15:26:47,666 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:47,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:47,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1615125302, now seen corresponding path program 1 times [2021-11-06 15:26:47,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:47,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203274691] [2021-11-06 15:26:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:47,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-06 15:26:47,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:47,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203274691] [2021-11-06 15:26:47,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203274691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:47,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:47,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-06 15:26:47,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660721774] [2021-11-06 15:26:47,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 15:26:47,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:47,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 15:26:47,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:26:47,847 INFO L87 Difference]: Start difference. First operand 2289 states and 3055 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:48,783 INFO L93 Difference]: Finished difference Result 12520 states and 16714 transitions. [2021-11-06 15:26:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 15:26:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 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 170 [2021-11-06 15:26:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:48,799 INFO L225 Difference]: With dead ends: 12520 [2021-11-06 15:26:48,799 INFO L226 Difference]: Without dead ends: 10272 [2021-11-06 15:26:48,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-06 15:26:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10272 states. [2021-11-06 15:26:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10272 to 2297. [2021-11-06 15:26:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 2286 states have (on average 1.3398950131233596) internal successors, (3063), 2296 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 3063 transitions. [2021-11-06 15:26:48,915 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 3063 transitions. Word has length 170 [2021-11-06 15:26:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:48,915 INFO L470 AbstractCegarLoop]: Abstraction has 2297 states and 3063 transitions. [2021-11-06 15:26:48,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:48,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 3063 transitions. [2021-11-06 15:26:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-06 15:26:48,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:48,918 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:48,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-06 15:26:48,918 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:48,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1672104782, now seen corresponding path program 1 times [2021-11-06 15:26:48,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:48,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996525400] [2021-11-06 15:26:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:48,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-06 15:26:49,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:49,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996525400] [2021-11-06 15:26:49,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996525400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:49,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:49,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-06 15:26:49,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144540959] [2021-11-06 15:26:49,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-06 15:26:49,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:49,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-06 15:26:49,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:26:49,161 INFO L87 Difference]: Start difference. First operand 2297 states and 3063 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:51,146 INFO L93 Difference]: Finished difference Result 24132 states and 32254 transitions. [2021-11-06 15:26:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-06 15:26:51,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 0 states have call successors, (0), 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 172 [2021-11-06 15:26:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:51,183 INFO L225 Difference]: With dead ends: 24132 [2021-11-06 15:26:51,184 INFO L226 Difference]: Without dead ends: 21876 [2021-11-06 15:26:51,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-11-06 15:26:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21876 states. [2021-11-06 15:26:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21876 to 2307. [2021-11-06 15:26:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2296 states have (on average 1.3384146341463414) internal successors, (3073), 2306 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3073 transitions. [2021-11-06 15:26:51,374 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3073 transitions. Word has length 172 [2021-11-06 15:26:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:51,375 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3073 transitions. [2021-11-06 15:26:51,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:51,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3073 transitions. [2021-11-06 15:26:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-06 15:26:51,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:51,379 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:51,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-06 15:26:51,379 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:51,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1158973614, now seen corresponding path program 1 times [2021-11-06 15:26:51,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:51,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396650127] [2021-11-06 15:26:51,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:51,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-06 15:26:51,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:51,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396650127] [2021-11-06 15:26:51,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396650127] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:51,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 15:26:51,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 15:26:51,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102452533] [2021-11-06 15:26:51,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:26:51,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:51,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:26:51,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:51,600 INFO L87 Difference]: Start difference. First operand 2307 states and 3073 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:51,700 INFO L93 Difference]: Finished difference Result 4591 states and 6125 transitions. [2021-11-06 15:26:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:26:51,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-06 15:26:51,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:51,705 INFO L225 Difference]: With dead ends: 4591 [2021-11-06 15:26:51,705 INFO L226 Difference]: Without dead ends: 2311 [2021-11-06 15:26:51,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 15:26:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-11-06 15:26:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 2311. [2021-11-06 15:26:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2300 states have (on average 1.3378260869565217) internal successors, (3077), 2310 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3077 transitions. [2021-11-06 15:26:51,800 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3077 transitions. Word has length 174 [2021-11-06 15:26:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:51,801 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 3077 transitions. [2021-11-06 15:26:51,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3077 transitions. [2021-11-06 15:26:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-06 15:26:51,803 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:51,803 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:51,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-06 15:26:51,804 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 226309134, now seen corresponding path program 1 times [2021-11-06 15:26:51,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:51,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388542861] [2021-11-06 15:26:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:51,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-06 15:26:52,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:52,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388542861] [2021-11-06 15:26:52,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388542861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:52,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888652434] [2021-11-06 15:26:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:52,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:52,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:52,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:26:52,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-06 15:26:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:52,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 2700 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 15:26:52,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:26:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-06 15:26:53,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888652434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:26:53,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:26:53,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-11-06 15:26:53,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876969405] [2021-11-06 15:26:53,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:26:53,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:26:53,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:26:53,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-06 15:26:53,049 INFO L87 Difference]: Start difference. First operand 2311 states and 3077 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:26:55,423 INFO L93 Difference]: Finished difference Result 6821 states and 9095 transitions. [2021-11-06 15:26:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-06 15:26:55,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 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 178 [2021-11-06 15:26:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:26:55,432 INFO L225 Difference]: With dead ends: 6821 [2021-11-06 15:26:55,432 INFO L226 Difference]: Without dead ends: 4485 [2021-11-06 15:26:55,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:26:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4485 states. [2021-11-06 15:26:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4485 to 2291. [2021-11-06 15:26:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2280 states have (on average 1.332017543859649) internal successors, (3037), 2290 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3037 transitions. [2021-11-06 15:26:55,572 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3037 transitions. Word has length 178 [2021-11-06 15:26:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:26:55,572 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 3037 transitions. [2021-11-06 15:26:55,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:26:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3037 transitions. [2021-11-06 15:26:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-06 15:26:55,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:26:55,575 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:26:55,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-06 15:26:55,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-06 15:26:55,793 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:26:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:26:55,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1261904099, now seen corresponding path program 1 times [2021-11-06 15:26:55,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:26:55,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858291866] [2021-11-06 15:26:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:55,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:26:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:26:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-06 15:26:56,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:26:56,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858291866] [2021-11-06 15:26:56,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858291866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:26:56,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595665241] [2021-11-06 15:26:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:26:56,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:26:56,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:26:56,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:26:56,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-06 15:27:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:27:12,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2831 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-06 15:27:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:27:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-06 15:27:13,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595665241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:27:13,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:27:13,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-06 15:27:13,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860353051] [2021-11-06 15:27:13,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-06 15:27:13,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:27:13,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-06 15:27:13,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:27:13,284 INFO L87 Difference]: Start difference. First operand 2291 states and 3037 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:27:13,487 INFO L93 Difference]: Finished difference Result 4558 states and 6052 transitions. [2021-11-06 15:27:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:27:13,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 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 186 [2021-11-06 15:27:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:27:13,491 INFO L225 Difference]: With dead ends: 4558 [2021-11-06 15:27:13,491 INFO L226 Difference]: Without dead ends: 2295 [2021-11-06 15:27:13,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 15:27:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-11-06 15:27:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 2295. [2021-11-06 15:27:13,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2284 states have (on average 1.3314360770577933) internal successors, (3041), 2294 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3041 transitions. [2021-11-06 15:27:13,610 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3041 transitions. Word has length 186 [2021-11-06 15:27:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:27:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 3041 transitions. [2021-11-06 15:27:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3041 transitions. [2021-11-06 15:27:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-06 15:27:13,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:27:13,613 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 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] [2021-11-06 15:27:13,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-06 15:27:13,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:27:13,828 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:27:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:27:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1862232161, now seen corresponding path program 2 times [2021-11-06 15:27:13,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:27:13,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929340879] [2021-11-06 15:27:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:27:13,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:27:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:27:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-06 15:27:14,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:27:14,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929340879] [2021-11-06 15:27:14,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929340879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:27:14,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723499782] [2021-11-06 15:27:14,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:27:14,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:27:14,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:27:14,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:27:14,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-06 15:27:28,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 15:27:28,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:27:28,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-06 15:27:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:27:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-06 15:27:28,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723499782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:27:28,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:27:28,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-06 15:27:28,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612601251] [2021-11-06 15:27:28,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 15:27:28,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:27:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 15:27:28,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:27:28,746 INFO L87 Difference]: Start difference. First operand 2295 states and 3041 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:27:28,886 INFO L93 Difference]: Finished difference Result 4544 states and 6031 transitions. [2021-11-06 15:27:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 15:27:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 190 [2021-11-06 15:27:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:27:28,890 INFO L225 Difference]: With dead ends: 4544 [2021-11-06 15:27:28,890 INFO L226 Difference]: Without dead ends: 2296 [2021-11-06 15:27:28,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:27:28,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-11-06 15:27:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2296. [2021-11-06 15:27:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2285 states have (on average 1.3312910284463895) internal successors, (3042), 2295 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 3042 transitions. [2021-11-06 15:27:28,978 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 3042 transitions. Word has length 190 [2021-11-06 15:27:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:27:28,978 INFO L470 AbstractCegarLoop]: Abstraction has 2296 states and 3042 transitions. [2021-11-06 15:27:28,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 3042 transitions. [2021-11-06 15:27:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-06 15:27:28,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:27:28,981 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 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] [2021-11-06 15:27:29,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-06 15:27:29,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:27:29,208 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:27:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:27:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash -910875146, now seen corresponding path program 1 times [2021-11-06 15:27:29,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:27:29,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33934051] [2021-11-06 15:27:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:27:29,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:27:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:27:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-06 15:27:29,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:27:29,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33934051] [2021-11-06 15:27:29,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33934051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:27:29,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073648358] [2021-11-06 15:27:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:27:29,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:27:29,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:27:29,442 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:27:29,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-06 15:27:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:27:45,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 2861 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 15:27:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:27:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-06 15:27:46,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073648358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:27:46,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:27:46,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 15:27:46,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302942594] [2021-11-06 15:27:46,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 15:27:46,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:27:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 15:27:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:27:46,231 INFO L87 Difference]: Start difference. First operand 2296 states and 3042 transitions. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:27:46,416 INFO L93 Difference]: Finished difference Result 4567 states and 6061 transitions. [2021-11-06 15:27:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:27:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 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 191 [2021-11-06 15:27:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:27:46,420 INFO L225 Difference]: With dead ends: 4567 [2021-11-06 15:27:46,420 INFO L226 Difference]: Without dead ends: 2300 [2021-11-06 15:27:46,423 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:27:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-11-06 15:27:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 2300. [2021-11-06 15:27:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2289 states have (on average 1.3307121013543033) internal successors, (3046), 2299 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3046 transitions. [2021-11-06 15:27:46,513 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3046 transitions. Word has length 191 [2021-11-06 15:27:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:27:46,513 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 3046 transitions. [2021-11-06 15:27:46,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3046 transitions. [2021-11-06 15:27:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-06 15:27:46,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:27:46,516 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:27:46,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-06 15:27:46,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:27:46,740 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:27:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:27:46,740 INFO L85 PathProgramCache]: Analyzing trace with hash -159176006, now seen corresponding path program 2 times [2021-11-06 15:27:46,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:27:46,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939976652] [2021-11-06 15:27:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:27:46,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:27:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:27:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-06 15:27:46,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:27:46,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939976652] [2021-11-06 15:27:46,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939976652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:27:46,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248990878] [2021-11-06 15:27:46,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:27:46,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:27:46,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:27:46,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:27:46,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-06 15:27:57,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-06 15:27:57,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:27:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-06 15:27:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:27:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-06 15:27:58,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248990878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 15:27:58,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-06 15:27:58,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-06 15:27:58,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349845927] [2021-11-06 15:27:58,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 15:27:58,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:27:58,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 15:27:58,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-06 15:27:58,376 INFO L87 Difference]: Start difference. First operand 2300 states and 3046 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:27:58,899 INFO L93 Difference]: Finished difference Result 6512 states and 8640 transitions. [2021-11-06 15:27:58,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 15:27:58,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 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 [2021-11-06 15:27:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:27:58,905 INFO L225 Difference]: With dead ends: 6512 [2021-11-06 15:27:58,905 INFO L226 Difference]: Without dead ends: 4221 [2021-11-06 15:27:58,907 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:27:58,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-11-06 15:27:59,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 2300. [2021-11-06 15:27:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2289 states have (on average 1.3302752293577982) internal successors, (3045), 2299 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3045 transitions. [2021-11-06 15:27:59,006 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3045 transitions. Word has length 195 [2021-11-06 15:27:59,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:27:59,006 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 3045 transitions. [2021-11-06 15:27:59,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:27:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3045 transitions. [2021-11-06 15:27:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-06 15:27:59,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:27:59,008 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:27:59,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-06 15:27:59,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-06 15:27:59,232 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:27:59,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:27:59,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1982732898, now seen corresponding path program 1 times [2021-11-06 15:27:59,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:27:59,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590798460] [2021-11-06 15:27:59,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:27:59,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:27:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:27:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-06 15:27:59,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:27:59,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590798460] [2021-11-06 15:27:59,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590798460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:27:59,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752575505] [2021-11-06 15:27:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:27:59,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:27:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:27:59,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:27:59,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-06 15:28:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:28:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 2903 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-06 15:28:33,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:28:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-06 15:28:34,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752575505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:28:34,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:28:34,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-06 15:28:34,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198733995] [2021-11-06 15:28:34,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-06 15:28:34,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:28:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-06 15:28:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:28:34,201 INFO L87 Difference]: Start difference. First operand 2300 states and 3045 transitions. Second operand has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:28:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:28:34,430 INFO L93 Difference]: Finished difference Result 4574 states and 6067 transitions. [2021-11-06 15:28:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-06 15:28:34,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-11-06 15:28:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:28:34,433 INFO L225 Difference]: With dead ends: 4574 [2021-11-06 15:28:34,433 INFO L226 Difference]: Without dead ends: 2304 [2021-11-06 15:28:34,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-06 15:28:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-11-06 15:28:34,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2304. [2021-11-06 15:28:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2293 states have (on average 1.3296990841692107) internal successors, (3049), 2303 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:28:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3049 transitions. [2021-11-06 15:28:34,524 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3049 transitions. Word has length 197 [2021-11-06 15:28:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:28:34,525 INFO L470 AbstractCegarLoop]: Abstraction has 2304 states and 3049 transitions. [2021-11-06 15:28:34,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:28:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3049 transitions. [2021-11-06 15:28:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-06 15:28:34,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:28:34,527 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:28:34,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-06 15:28:34,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:28:34,744 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:28:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:28:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1090296614, now seen corresponding path program 2 times [2021-11-06 15:28:34,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:28:34,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828788551] [2021-11-06 15:28:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:28:34,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:28:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:28:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-06 15:28:34,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:28:34,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828788551] [2021-11-06 15:28:34,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828788551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:28:34,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028032829] [2021-11-06 15:28:34,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-06 15:28:34,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:28:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:28:34,997 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:28:34,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-06 15:29:53,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-06 15:29:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:29:53,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 2927 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-06 15:29:53,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:29:53,761 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-06 15:29:53,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028032829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:29:53,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:29:53,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2021-11-06 15:29:53,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381331521] [2021-11-06 15:29:53,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-06 15:29:53,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:29:53,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-06 15:29:53,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:29:53,763 INFO L87 Difference]: Start difference. First operand 2304 states and 3049 transitions. Second operand has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:29:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:29:54,011 INFO L93 Difference]: Finished difference Result 4579 states and 6070 transitions. [2021-11-06 15:29:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-06 15:29:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 0 states have call successors, (0), 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 201 [2021-11-06 15:29:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:29:54,015 INFO L225 Difference]: With dead ends: 4579 [2021-11-06 15:29:54,015 INFO L226 Difference]: Without dead ends: 2305 [2021-11-06 15:29:54,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-06 15:29:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-11-06 15:29:54,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2305. [2021-11-06 15:29:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2294 states have (on average 1.3278116826503923) internal successors, (3046), 2304 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:29:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3046 transitions. [2021-11-06 15:29:54,115 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3046 transitions. Word has length 201 [2021-11-06 15:29:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:29:54,116 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 3046 transitions. [2021-11-06 15:29:54,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:29:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3046 transitions. [2021-11-06 15:29:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-06 15:29:54,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:29:54,154 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:29:54,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-06 15:29:54,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:29:54,380 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:29:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:29:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2050013341, now seen corresponding path program 3 times [2021-11-06 15:29:54,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:29:54,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216994883] [2021-11-06 15:29:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:29:54,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:29:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:29:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-06 15:29:54,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:29:54,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216994883] [2021-11-06 15:29:54,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216994883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:29:54,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768962131] [2021-11-06 15:29:54,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-06 15:29:54,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:29:54,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:29:54,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:29:54,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-06 15:30:42,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-06 15:30:42,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:30:42,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 2325 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-06 15:30:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:30:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-06 15:30:42,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768962131] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:30:42,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:30:42,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-06 15:30:42,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212242272] [2021-11-06 15:30:42,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-06 15:30:42,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:30:42,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-06 15:30:42,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:30:42,942 INFO L87 Difference]: Start difference. First operand 2305 states and 3046 transitions. Second operand has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:30:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:30:43,067 INFO L93 Difference]: Finished difference Result 4554 states and 6036 transitions. [2021-11-06 15:30:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 15:30:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 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 [2021-11-06 15:30:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:30:43,070 INFO L225 Difference]: With dead ends: 4554 [2021-11-06 15:30:43,070 INFO L226 Difference]: Without dead ends: 2306 [2021-11-06 15:30:43,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-06 15:30:43,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-11-06 15:30:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2306. [2021-11-06 15:30:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2295 states have (on average 1.3276688453159042) internal successors, (3047), 2305 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:30:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3047 transitions. [2021-11-06 15:30:43,195 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3047 transitions. Word has length 202 [2021-11-06 15:30:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:30:43,195 INFO L470 AbstractCegarLoop]: Abstraction has 2306 states and 3047 transitions. [2021-11-06 15:30:43,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:30:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3047 transitions. [2021-11-06 15:30:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-06 15:30:43,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:30:43,197 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:30:43,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-06 15:30:43,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-06 15:30:43,400 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:30:43,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:30:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash 615374138, now seen corresponding path program 4 times [2021-11-06 15:30:43,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:30:43,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013555220] [2021-11-06 15:30:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:30:43,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:30:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:30:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-06 15:30:43,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:30:43,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013555220] [2021-11-06 15:30:43,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013555220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:30:43,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159110204] [2021-11-06 15:30:43,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-06 15:30:43,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:30:43,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:30:43,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:30:43,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-06 15:31:06,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-06 15:31:06,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-06 15:31:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 2939 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-06 15:31:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-06 15:31:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-06 15:31:07,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159110204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:31:07,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-06 15:31:07,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 12 [2021-11-06 15:31:07,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883946519] [2021-11-06 15:31:07,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-06 15:31:07,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 15:31:07,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-06 15:31:07,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-06 15:31:07,048 INFO L87 Difference]: Start difference. First operand 2306 states and 3047 transitions. Second operand has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:31:07,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 15:31:07,382 INFO L93 Difference]: Finished difference Result 4555 states and 6037 transitions. [2021-11-06 15:31:07,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-06 15:31:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 0 states have call successors, (0), 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 203 [2021-11-06 15:31:07,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 15:31:07,385 INFO L225 Difference]: With dead ends: 4555 [2021-11-06 15:31:07,385 INFO L226 Difference]: Without dead ends: 2307 [2021-11-06 15:31:07,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-06 15:31:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-11-06 15:31:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2307. [2021-11-06 15:31:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2296 states have (on average 1.3275261324041812) internal successors, (3048), 2306 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:31:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3048 transitions. [2021-11-06 15:31:07,478 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3048 transitions. Word has length 203 [2021-11-06 15:31:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 15:31:07,478 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3048 transitions. [2021-11-06 15:31:07,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.083333333333334) internal successors, (181), 12 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 15:31:07,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3048 transitions. [2021-11-06 15:31:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-06 15:31:07,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 15:31:07,481 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 15:31:07,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-06 15:31:07,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-06 15:31:07,700 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2021-11-06 15:31:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 15:31:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash -908768195, now seen corresponding path program 5 times [2021-11-06 15:31:07,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 15:31:07,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085426417] [2021-11-06 15:31:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 15:31:07,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 15:31:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 15:31:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-06 15:31:08,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 15:31:08,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085426417] [2021-11-06 15:31:08,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085426417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-06 15:31:08,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45692513] [2021-11-06 15:31:08,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-06 15:31:08,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-06 15:31:08,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 15:31:08,014 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-06 15:31:08,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process Killed by 15