/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:18:03,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:18:03,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:18:03,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:18:03,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:18:03,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:18:03,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:18:03,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:18:03,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:18:03,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:18:03,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:18:03,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:18:03,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:18:03,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:18:03,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:18:03,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:18:03,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:18:03,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:18:03,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:18:03,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:18:03,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:18:03,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:18:03,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:18:03,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:18:03,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:18:03,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:18:03,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:18:03,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:18:03,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:18:03,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:18:03,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:18:03,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:18:03,466 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:18:03,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:18:03,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:18:03,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:18:03,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:18:03,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:18:03,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:18:03,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:18:03,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:18:03,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:18:03,535 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:18:03,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:18:03,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:18:03,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:18:03,539 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:18:03,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:18:03,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:18:03,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:18:03,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:18:03,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:18:03,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:18:03,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:18:03,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:18:03,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:18:03,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:18:03,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:18:03,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:18:03,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:18:03,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:18:03,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:18:03,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:18:03,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:18:03,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:18:03,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:18:03,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:18:03,545 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:18:04,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:18:04,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:18:04,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:18:04,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:18:04,049 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:18:04,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2020-12-22 13:18:04,143 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e1c3019/389d03ffd4984ba286191338e56a954f/FLAGe52e05f26 [2020-12-22 13:18:05,360 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:18:05,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2020-12-22 13:18:05,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e1c3019/389d03ffd4984ba286191338e56a954f/FLAGe52e05f26 [2020-12-22 13:18:05,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93e1c3019/389d03ffd4984ba286191338e56a954f [2020-12-22 13:18:05,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:18:05,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:18:05,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:18:05,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:18:05,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:18:05,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:18:05" (1/1) ... [2020-12-22 13:18:05,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d8f1418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:05, skipping insertion in model container [2020-12-22 13:18:05,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:18:05" (1/1) ... [2020-12-22 13:18:05,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:18:05,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:18:06,893 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i[167793,167806] [2020-12-22 13:18:07,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:18:07,843 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:18:08,025 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i[167793,167806] [2020-12-22 13:18:08,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:18:08,748 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:18:08,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08 WrapperNode [2020-12-22 13:18:08,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:18:08,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:18:08,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:18:08,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:18:08,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:08,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:09,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:18:09,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:18:09,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:18:09,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:18:09,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:09,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:09,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:09,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:09,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:09,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:09,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... [2020-12-22 13:18:09,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:18:09,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:18:09,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:18:09,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:18:09,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:18:10,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:18:10,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:18:10,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:18:10,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:18:10,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:18:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:18:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:18:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:18:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:18:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:18:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:18:10,059 INFO L130 BoogieDeclarations]: Found specification of procedure can_fill_info [2020-12-22 13:18:10,060 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fill_info [2020-12-22 13:18:10,060 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2020-12-22 13:18:10,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2020-12-22 13:18:10,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:18:10,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:18:10,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:18:10,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:18:23,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:18:23,837 INFO L299 CfgBuilder]: Removed 1345 assume(true) statements. [2020-12-22 13:18:23,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:18:23 BoogieIcfgContainer [2020-12-22 13:18:23,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:18:23,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:18:23,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:18:23,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:18:23,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:18:05" (1/3) ... [2020-12-22 13:18:23,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bda569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:18:23, skipping insertion in model container [2020-12-22 13:18:23,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:08" (2/3) ... [2020-12-22 13:18:23,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bda569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:18:23, skipping insertion in model container [2020-12-22 13:18:23,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:18:23" (3/3) ... [2020-12-22 13:18:23,852 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--can--can-dev.ko-entry_point.cil.out.i [2020-12-22 13:18:23,859 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:18:23,867 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:18:23,889 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:18:23,926 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:18:23,926 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:18:23,926 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:18:23,926 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:18:23,926 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:18:23,927 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:18:23,927 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:18:23,927 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:18:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states. [2020-12-22 13:18:23,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 13:18:23,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:23,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:18:23,989 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:23,996 INFO L82 PathProgramCache]: Analyzing trace with hash -636873605, now seen corresponding path program 1 times [2020-12-22 13:18:24,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:24,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241242971] [2020-12-22 13:18:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:18:24,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241242971] [2020-12-22 13:18:24,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:24,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:18:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030373893] [2020-12-22 13:18:24,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:18:24,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:24,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:18:24,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:18:24,821 INFO L87 Difference]: Start difference. First operand 1820 states. Second operand 3 states. [2020-12-22 13:18:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:26,317 INFO L93 Difference]: Finished difference Result 5402 states and 8026 transitions. [2020-12-22 13:18:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:18:26,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 13:18:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:26,359 INFO L225 Difference]: With dead ends: 5402 [2020-12-22 13:18:26,360 INFO L226 Difference]: Without dead ends: 3553 [2020-12-22 13:18:26,372 INFO L677 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 [2020-12-22 13:18:26,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2020-12-22 13:18:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 3553. [2020-12-22 13:18:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3553 states. [2020-12-22 13:18:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 5105 transitions. [2020-12-22 13:18:26,582 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 5105 transitions. Word has length 20 [2020-12-22 13:18:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:26,583 INFO L481 AbstractCegarLoop]: Abstraction has 3553 states and 5105 transitions. [2020-12-22 13:18:26,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:18:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 5105 transitions. [2020-12-22 13:18:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 13:18:26,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:26,589 INFO L422 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] [2020-12-22 13:18:26,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:18:26,589 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1054608242, now seen corresponding path program 1 times [2020-12-22 13:18:26,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:26,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314514896] [2020-12-22 13:18:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:18:26,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314514896] [2020-12-22 13:18:26,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:26,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:18:26,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878515420] [2020-12-22 13:18:26,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:18:26,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:18:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:18:26,835 INFO L87 Difference]: Start difference. First operand 3553 states and 5105 transitions. Second operand 5 states. [2020-12-22 13:18:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:27,789 INFO L93 Difference]: Finished difference Result 10639 states and 15294 transitions. [2020-12-22 13:18:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:27,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 13:18:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:27,845 INFO L225 Difference]: With dead ends: 10639 [2020-12-22 13:18:27,845 INFO L226 Difference]: Without dead ends: 7089 [2020-12-22 13:18:27,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:18:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2020-12-22 13:18:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 6969. [2020-12-22 13:18:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6969 states. [2020-12-22 13:18:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6969 states to 6969 states and 10030 transitions. [2020-12-22 13:18:28,124 INFO L78 Accepts]: Start accepts. Automaton has 6969 states and 10030 transitions. Word has length 26 [2020-12-22 13:18:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:28,125 INFO L481 AbstractCegarLoop]: Abstraction has 6969 states and 10030 transitions. [2020-12-22 13:18:28,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:18:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6969 states and 10030 transitions. [2020-12-22 13:18:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 13:18:28,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:28,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:18:28,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:18:28,148 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1900546352, now seen corresponding path program 1 times [2020-12-22 13:18:28,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:28,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320017426] [2020-12-22 13:18:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:18:28,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320017426] [2020-12-22 13:18:28,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:28,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:18:28,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777170266] [2020-12-22 13:18:28,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:18:28,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:28,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:18:28,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:18:28,535 INFO L87 Difference]: Start difference. First operand 6969 states and 10030 transitions. Second operand 5 states. [2020-12-22 13:18:31,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:31,574 INFO L93 Difference]: Finished difference Result 27021 states and 38914 transitions. [2020-12-22 13:18:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:31,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-12-22 13:18:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:31,687 INFO L225 Difference]: With dead ends: 27021 [2020-12-22 13:18:31,687 INFO L226 Difference]: Without dead ends: 20061 [2020-12-22 13:18:31,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:18:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20061 states. [2020-12-22 13:18:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20061 to 20045. [2020-12-22 13:18:32,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20045 states. [2020-12-22 13:18:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20045 states to 20045 states and 28832 transitions. [2020-12-22 13:18:32,984 INFO L78 Accepts]: Start accepts. Automaton has 20045 states and 28832 transitions. Word has length 70 [2020-12-22 13:18:32,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:32,985 INFO L481 AbstractCegarLoop]: Abstraction has 20045 states and 28832 transitions. [2020-12-22 13:18:32,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:18:32,986 INFO L276 IsEmpty]: Start isEmpty. Operand 20045 states and 28832 transitions. [2020-12-22 13:18:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 13:18:33,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:33,003 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:18:33,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:18:33,004 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:33,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:33,005 INFO L82 PathProgramCache]: Analyzing trace with hash -110241493, now seen corresponding path program 1 times [2020-12-22 13:18:33,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:33,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95472278] [2020-12-22 13:18:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:18:33,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95472278] [2020-12-22 13:18:33,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:33,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:18:33,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162701935] [2020-12-22 13:18:33,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:18:33,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:18:33,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:18:33,339 INFO L87 Difference]: Start difference. First operand 20045 states and 28832 transitions. Second operand 4 states. [2020-12-22 13:18:36,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:36,081 INFO L93 Difference]: Finished difference Result 93068 states and 134517 transitions. [2020-12-22 13:18:36,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:36,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-12-22 13:18:36,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:36,384 INFO L225 Difference]: With dead ends: 93068 [2020-12-22 13:18:36,384 INFO L226 Difference]: Without dead ends: 73032 [2020-12-22 13:18:36,442 INFO L677 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 [2020-12-22 13:18:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73032 states. [2020-12-22 13:18:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73032 to 20149. [2020-12-22 13:18:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20149 states. [2020-12-22 13:18:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20149 states to 20149 states and 28936 transitions. [2020-12-22 13:18:38,203 INFO L78 Accepts]: Start accepts. Automaton has 20149 states and 28936 transitions. Word has length 71 [2020-12-22 13:18:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:38,206 INFO L481 AbstractCegarLoop]: Abstraction has 20149 states and 28936 transitions. [2020-12-22 13:18:38,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:18:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 20149 states and 28936 transitions. [2020-12-22 13:18:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 13:18:38,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:38,229 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:18:38,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:18:38,229 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:38,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1159529646, now seen corresponding path program 1 times [2020-12-22 13:18:38,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:38,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162365800] [2020-12-22 13:18:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:18:39,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162365800] [2020-12-22 13:18:39,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:39,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:18:39,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548650314] [2020-12-22 13:18:39,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:18:39,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:39,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:18:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:18:39,114 INFO L87 Difference]: Start difference. First operand 20149 states and 28936 transitions. Second operand 5 states. [2020-12-22 13:18:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:41,000 INFO L93 Difference]: Finished difference Result 50122 states and 71995 transitions. [2020-12-22 13:18:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:18:41,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-12-22 13:18:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:41,078 INFO L225 Difference]: With dead ends: 50122 [2020-12-22 13:18:41,078 INFO L226 Difference]: Without dead ends: 29982 [2020-12-22 13:18:41,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:18:41,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29982 states. [2020-12-22 13:18:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29982 to 20167. [2020-12-22 13:18:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20167 states. [2020-12-22 13:18:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20167 states to 20167 states and 28951 transitions. [2020-12-22 13:18:42,631 INFO L78 Accepts]: Start accepts. Automaton has 20167 states and 28951 transitions. Word has length 74 [2020-12-22 13:18:42,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:42,634 INFO L481 AbstractCegarLoop]: Abstraction has 20167 states and 28951 transitions. [2020-12-22 13:18:42,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:18:42,635 INFO L276 IsEmpty]: Start isEmpty. Operand 20167 states and 28951 transitions. [2020-12-22 13:18:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 13:18:42,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:42,652 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:18:42,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:18:42,652 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:42,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1839588016, now seen corresponding path program 1 times [2020-12-22 13:18:42,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:42,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628513917] [2020-12-22 13:18:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:18:44,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628513917] [2020-12-22 13:18:44,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:44,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 13:18:44,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56248305] [2020-12-22 13:18:44,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:18:44,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:18:44,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:18:44,765 INFO L87 Difference]: Start difference. First operand 20167 states and 28951 transitions. Second operand 11 states. [2020-12-22 13:18:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:18:54,613 INFO L93 Difference]: Finished difference Result 124134 states and 179920 transitions. [2020-12-22 13:18:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 13:18:54,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2020-12-22 13:18:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:18:54,926 INFO L225 Difference]: With dead ends: 124134 [2020-12-22 13:18:54,927 INFO L226 Difference]: Without dead ends: 103976 [2020-12-22 13:18:54,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-12-22 13:18:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103976 states. [2020-12-22 13:18:58,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103976 to 20375. [2020-12-22 13:18:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20375 states. [2020-12-22 13:18:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20375 states to 20375 states and 29107 transitions. [2020-12-22 13:18:58,310 INFO L78 Accepts]: Start accepts. Automaton has 20375 states and 29107 transitions. Word has length 74 [2020-12-22 13:18:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:18:58,311 INFO L481 AbstractCegarLoop]: Abstraction has 20375 states and 29107 transitions. [2020-12-22 13:18:58,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:18:58,311 INFO L276 IsEmpty]: Start isEmpty. Operand 20375 states and 29107 transitions. [2020-12-22 13:18:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 13:18:58,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:18:58,341 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:18:58,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:18:58,341 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:18:58,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:18:58,342 INFO L82 PathProgramCache]: Analyzing trace with hash -849825764, now seen corresponding path program 1 times [2020-12-22 13:18:58,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:18:58,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832031069] [2020-12-22 13:18:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:18:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:18:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:18:58,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832031069] [2020-12-22 13:18:58,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:18:58,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:18:58,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785260718] [2020-12-22 13:18:58,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:18:58,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:18:58,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:18:58,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:18:58,532 INFO L87 Difference]: Start difference. First operand 20375 states and 29107 transitions. Second operand 3 states. [2020-12-22 13:19:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:01,824 INFO L93 Difference]: Finished difference Result 49330 states and 70595 transitions. [2020-12-22 13:19:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:01,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 76 [2020-12-22 13:19:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:01,888 INFO L225 Difference]: With dead ends: 49330 [2020-12-22 13:19:01,888 INFO L226 Difference]: Without dead ends: 38987 [2020-12-22 13:19:01,912 INFO L677 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 [2020-12-22 13:19:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38987 states. [2020-12-22 13:19:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38987 to 20531. [2020-12-22 13:19:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20531 states. [2020-12-22 13:19:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20531 states to 20531 states and 29263 transitions. [2020-12-22 13:19:04,261 INFO L78 Accepts]: Start accepts. Automaton has 20531 states and 29263 transitions. Word has length 76 [2020-12-22 13:19:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:04,261 INFO L481 AbstractCegarLoop]: Abstraction has 20531 states and 29263 transitions. [2020-12-22 13:19:04,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:04,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20531 states and 29263 transitions. [2020-12-22 13:19:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 13:19:04,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:04,284 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:19:04,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:19:04,284 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:04,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1669469059, now seen corresponding path program 1 times [2020-12-22 13:19:04,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:04,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938545519] [2020-12-22 13:19:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:04,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938545519] [2020-12-22 13:19:04,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:04,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:19:04,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389904598] [2020-12-22 13:19:04,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:19:04,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:04,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:19:04,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:19:04,482 INFO L87 Difference]: Start difference. First operand 20531 states and 29263 transitions. Second operand 4 states. [2020-12-22 13:19:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:09,945 INFO L93 Difference]: Finished difference Result 49952 states and 71222 transitions. [2020-12-22 13:19:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:19:09,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-12-22 13:19:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:10,000 INFO L225 Difference]: With dead ends: 49952 [2020-12-22 13:19:10,001 INFO L226 Difference]: Without dead ends: 29430 [2020-12-22 13:19:10,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:19:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29430 states. [2020-12-22 13:19:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29430 to 20297. [2020-12-22 13:19:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20297 states. [2020-12-22 13:19:12,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20297 states to 20297 states and 28795 transitions. [2020-12-22 13:19:12,101 INFO L78 Accepts]: Start accepts. Automaton has 20297 states and 28795 transitions. Word has length 78 [2020-12-22 13:19:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:12,101 INFO L481 AbstractCegarLoop]: Abstraction has 20297 states and 28795 transitions. [2020-12-22 13:19:12,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:19:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20297 states and 28795 transitions. [2020-12-22 13:19:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 13:19:12,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:12,127 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:19:12,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:19:12,127 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:12,128 INFO L82 PathProgramCache]: Analyzing trace with hash 135443171, now seen corresponding path program 1 times [2020-12-22 13:19:12,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:12,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087809494] [2020-12-22 13:19:12,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:12,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087809494] [2020-12-22 13:19:12,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:12,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:12,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99444013] [2020-12-22 13:19:12,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:12,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:12,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:12,353 INFO L87 Difference]: Start difference. First operand 20297 states and 28795 transitions. Second operand 3 states. [2020-12-22 13:19:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:14,221 INFO L93 Difference]: Finished difference Result 40637 states and 57684 transitions. [2020-12-22 13:19:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:14,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 13:19:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:14,258 INFO L225 Difference]: With dead ends: 40637 [2020-12-22 13:19:14,258 INFO L226 Difference]: Without dead ends: 20349 [2020-12-22 13:19:14,284 INFO L677 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 [2020-12-22 13:19:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2020-12-22 13:19:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 20349. [2020-12-22 13:19:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20349 states. [2020-12-22 13:19:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20349 states to 20349 states and 28847 transitions. [2020-12-22 13:19:16,241 INFO L78 Accepts]: Start accepts. Automaton has 20349 states and 28847 transitions. Word has length 79 [2020-12-22 13:19:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:16,241 INFO L481 AbstractCegarLoop]: Abstraction has 20349 states and 28847 transitions. [2020-12-22 13:19:16,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 20349 states and 28847 transitions. [2020-12-22 13:19:16,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 13:19:16,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:16,259 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:19:16,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:19:16,260 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:16,260 INFO L82 PathProgramCache]: Analyzing trace with hash 67353562, now seen corresponding path program 1 times [2020-12-22 13:19:16,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:16,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406023091] [2020-12-22 13:19:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:16,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406023091] [2020-12-22 13:19:16,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333880637] [2020-12-22 13:19:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:19:17,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:19:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:17,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:19:17,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:19:17,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477589872] [2020-12-22 13:19:17,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:19:17,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:17,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:19:17,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:19:17,692 INFO L87 Difference]: Start difference. First operand 20349 states and 28847 transitions. Second operand 6 states. [2020-12-22 13:19:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:21,292 INFO L93 Difference]: Finished difference Result 40741 states and 57788 transitions. [2020-12-22 13:19:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:19:21,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 13:19:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:21,406 INFO L225 Difference]: With dead ends: 40741 [2020-12-22 13:19:21,407 INFO L226 Difference]: Without dead ends: 20401 [2020-12-22 13:19:21,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:19:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20401 states. [2020-12-22 13:19:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20401 to 20401. [2020-12-22 13:19:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20401 states. [2020-12-22 13:19:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20401 states to 20401 states and 28899 transitions. [2020-12-22 13:19:24,272 INFO L78 Accepts]: Start accepts. Automaton has 20401 states and 28899 transitions. Word has length 80 [2020-12-22 13:19:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:24,272 INFO L481 AbstractCegarLoop]: Abstraction has 20401 states and 28899 transitions. [2020-12-22 13:19:24,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:19:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20401 states and 28899 transitions. [2020-12-22 13:19:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 13:19:24,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:24,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:19:24,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 13:19:24,516 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2043424317, now seen corresponding path program 2 times [2020-12-22 13:19:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:24,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249284135] [2020-12-22 13:19:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:24,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249284135] [2020-12-22 13:19:24,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837616090] [2020-12-22 13:19:24,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:26,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:19:26,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:19:26,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:19:26,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:19:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:27,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:19:27,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:19:27,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586445886] [2020-12-22 13:19:27,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:19:27,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:19:27,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:19:27,092 INFO L87 Difference]: Start difference. First operand 20401 states and 28899 transitions. Second operand 8 states. [2020-12-22 13:19:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:28,988 INFO L93 Difference]: Finished difference Result 40845 states and 57892 transitions. [2020-12-22 13:19:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:19:28,994 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 81 [2020-12-22 13:19:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:29,080 INFO L225 Difference]: With dead ends: 40845 [2020-12-22 13:19:29,081 INFO L226 Difference]: Without dead ends: 20453 [2020-12-22 13:19:29,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:19:29,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20453 states. [2020-12-22 13:19:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20453 to 20453. [2020-12-22 13:19:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20453 states. [2020-12-22 13:19:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20453 states to 20453 states and 28951 transitions. [2020-12-22 13:19:31,253 INFO L78 Accepts]: Start accepts. Automaton has 20453 states and 28951 transitions. Word has length 81 [2020-12-22 13:19:31,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:31,254 INFO L481 AbstractCegarLoop]: Abstraction has 20453 states and 28951 transitions. [2020-12-22 13:19:31,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:19:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 20453 states and 28951 transitions. [2020-12-22 13:19:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 13:19:31,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:31,267 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:19:31,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:31,481 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:31,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:31,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1241938170, now seen corresponding path program 3 times [2020-12-22 13:19:31,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:31,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774880896] [2020-12-22 13:19:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774880896] [2020-12-22 13:19:31,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340980986] [2020-12-22 13:19:31,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:19:36,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:19:36,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:19:36,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 2174 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 13:19:36,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:19:37,165 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 13:19:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:19:37,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:19:37,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [6] total 18 [2020-12-22 13:19:37,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248151223] [2020-12-22 13:19:37,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 13:19:37,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 13:19:37,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-12-22 13:19:37,271 INFO L87 Difference]: Start difference. First operand 20453 states and 28951 transitions. Second operand 14 states. [2020-12-22 13:19:39,549 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-12-22 13:19:41,215 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 13:19:41,831 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 13:19:42,170 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-12-22 13:19:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:57,566 INFO L93 Difference]: Finished difference Result 142214 states and 204469 transitions. [2020-12-22 13:19:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 13:19:57,568 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-12-22 13:19:57,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:58,142 INFO L225 Difference]: With dead ends: 142214 [2020-12-22 13:19:58,143 INFO L226 Difference]: Without dead ends: 121770 [2020-12-22 13:19:58,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=571, Invalid=1979, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 13:19:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121770 states. [2020-12-22 13:20:01,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121770 to 20609. [2020-12-22 13:20:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20609 states. [2020-12-22 13:20:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20609 states to 20609 states and 29107 transitions. [2020-12-22 13:20:01,486 INFO L78 Accepts]: Start accepts. Automaton has 20609 states and 29107 transitions. Word has length 82 [2020-12-22 13:20:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:01,487 INFO L481 AbstractCegarLoop]: Abstraction has 20609 states and 29107 transitions. [2020-12-22 13:20:01,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 13:20:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 20609 states and 29107 transitions. [2020-12-22 13:20:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 13:20:01,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:01,499 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:01,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 13:20:01,714 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:01,715 INFO L82 PathProgramCache]: Analyzing trace with hash 847571384, now seen corresponding path program 1 times [2020-12-22 13:20:01,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:01,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43015769] [2020-12-22 13:20:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:01,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43015769] [2020-12-22 13:20:01,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129502458] [2020-12-22 13:20:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:02,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 2198 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:20:02,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:03,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:20:03,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:20:03,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309315599] [2020-12-22 13:20:03,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:20:03,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:20:03,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:20:03,104 INFO L87 Difference]: Start difference. First operand 20609 states and 29107 transitions. Second operand 10 states. [2020-12-22 13:20:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:06,396 INFO L93 Difference]: Finished difference Result 41261 states and 58308 transitions. [2020-12-22 13:20:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:20:06,397 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-12-22 13:20:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:06,439 INFO L225 Difference]: With dead ends: 41261 [2020-12-22 13:20:06,439 INFO L226 Difference]: Without dead ends: 20661 [2020-12-22 13:20:06,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:20:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20661 states. [2020-12-22 13:20:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20661 to 20661. [2020-12-22 13:20:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20661 states. [2020-12-22 13:20:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20661 states to 20661 states and 29159 transitions. [2020-12-22 13:20:09,321 INFO L78 Accepts]: Start accepts. Automaton has 20661 states and 29159 transitions. Word has length 82 [2020-12-22 13:20:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:09,321 INFO L481 AbstractCegarLoop]: Abstraction has 20661 states and 29159 transitions. [2020-12-22 13:20:09,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:20:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 20661 states and 29159 transitions. [2020-12-22 13:20:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 13:20:09,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:09,333 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-12-22 13:20:09,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:09,541 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:09,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:09,542 INFO L82 PathProgramCache]: Analyzing trace with hash -385406623, now seen corresponding path program 2 times [2020-12-22 13:20:09,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:09,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041155372] [2020-12-22 13:20:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:09,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041155372] [2020-12-22 13:20:09,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511738140] [2020-12-22 13:20:09,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:11,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:20:11,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:20:11,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 2204 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 13:20:11,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:12,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:20:12,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 13:20:12,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728137360] [2020-12-22 13:20:12,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 13:20:12,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 13:20:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:20:12,179 INFO L87 Difference]: Start difference. First operand 20661 states and 29159 transitions. Second operand 12 states. [2020-12-22 13:20:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:14,713 INFO L93 Difference]: Finished difference Result 41365 states and 58412 transitions. [2020-12-22 13:20:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:20:14,714 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-12-22 13:20:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:14,749 INFO L225 Difference]: With dead ends: 41365 [2020-12-22 13:20:14,749 INFO L226 Difference]: Without dead ends: 20713 [2020-12-22 13:20:14,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:20:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20713 states. [2020-12-22 13:20:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20713 to 20713. [2020-12-22 13:20:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20713 states. [2020-12-22 13:20:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20713 states to 20713 states and 29211 transitions. [2020-12-22 13:20:17,436 INFO L78 Accepts]: Start accepts. Automaton has 20713 states and 29211 transitions. Word has length 83 [2020-12-22 13:20:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:17,436 INFO L481 AbstractCegarLoop]: Abstraction has 20713 states and 29211 transitions. [2020-12-22 13:20:17,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 13:20:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 20713 states and 29211 transitions. [2020-12-22 13:20:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 13:20:17,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:17,447 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:17,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 13:20:17,661 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:17,662 INFO L82 PathProgramCache]: Analyzing trace with hash 46980824, now seen corresponding path program 3 times [2020-12-22 13:20:17,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:17,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373479554] [2020-12-22 13:20:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:17,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373479554] [2020-12-22 13:20:17,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204809074] [2020-12-22 13:20:17,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:20,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:20:20,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:20:20,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-22 13:20:20,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:20:21,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:20:21,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8] total 21 [2020-12-22 13:20:21,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160433035] [2020-12-22 13:20:21,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 13:20:21,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 13:20:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-12-22 13:20:21,739 INFO L87 Difference]: Start difference. First operand 20713 states and 29211 transitions. Second operand 15 states. [2020-12-22 13:20:24,097 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-22 13:20:24,361 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 13:20:24,630 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 13:20:25,844 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-12-22 13:20:26,131 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-22 13:20:26,486 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-12-22 13:20:26,850 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-12-22 13:20:29,522 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-12-22 13:20:29,866 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-12-22 13:20:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:40,602 INFO L93 Difference]: Finished difference Result 105882 states and 152121 transitions. [2020-12-22 13:20:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 13:20:40,604 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-12-22 13:20:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:40,762 INFO L225 Difference]: With dead ends: 105882 [2020-12-22 13:20:40,762 INFO L226 Difference]: Without dead ends: 85178 [2020-12-22 13:20:40,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 13:20:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85178 states. [2020-12-22 13:20:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85178 to 21493. [2020-12-22 13:20:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21493 states. [2020-12-22 13:20:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21493 states to 21493 states and 30043 transitions. [2020-12-22 13:20:44,528 INFO L78 Accepts]: Start accepts. Automaton has 21493 states and 30043 transitions. Word has length 84 [2020-12-22 13:20:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:44,529 INFO L481 AbstractCegarLoop]: Abstraction has 21493 states and 30043 transitions. [2020-12-22 13:20:44,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 13:20:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 21493 states and 30043 transitions. [2020-12-22 13:20:44,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 13:20:44,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:44,544 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:44,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:44,758 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:44,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:44,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1980197908, now seen corresponding path program 1 times [2020-12-22 13:20:44,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:44,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646351951] [2020-12-22 13:20:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:45,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646351951] [2020-12-22 13:20:45,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611244983] [2020-12-22 13:20:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 2265 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 13:20:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:46,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:20:46,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 13:20:46,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599228911] [2020-12-22 13:20:46,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 13:20:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:46,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 13:20:46,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:20:46,223 INFO L87 Difference]: Start difference. First operand 21493 states and 30043 transitions. Second operand 14 states. [2020-12-22 13:20:49,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:49,873 INFO L93 Difference]: Finished difference Result 43081 states and 60284 transitions. [2020-12-22 13:20:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:20:49,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2020-12-22 13:20:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:49,903 INFO L225 Difference]: With dead ends: 43081 [2020-12-22 13:20:49,903 INFO L226 Difference]: Without dead ends: 21597 [2020-12-22 13:20:49,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:20:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21597 states. [2020-12-22 13:20:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21597 to 21597. [2020-12-22 13:20:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21597 states. [2020-12-22 13:20:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21597 states to 21597 states and 30147 transitions. [2020-12-22 13:20:53,574 INFO L78 Accepts]: Start accepts. Automaton has 21597 states and 30147 transitions. Word has length 90 [2020-12-22 13:20:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:53,574 INFO L481 AbstractCegarLoop]: Abstraction has 21597 states and 30147 transitions. [2020-12-22 13:20:53,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 13:20:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 21597 states and 30147 transitions. [2020-12-22 13:20:53,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 13:20:53,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:53,590 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:53,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 13:20:53,800 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1459165845, now seen corresponding path program 2 times [2020-12-22 13:20:53,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:53,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628214733] [2020-12-22 13:20:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:54,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628214733] [2020-12-22 13:20:54,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767196573] [2020-12-22 13:20:54,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:56,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:20:56,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:20:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 2271 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 13:20:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:56,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:20:56,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 13:20:56,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078322799] [2020-12-22 13:20:56,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 13:20:56,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 13:20:56,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:20:56,901 INFO L87 Difference]: Start difference. First operand 21597 states and 30147 transitions. Second operand 16 states. [2020-12-22 13:21:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:00,594 INFO L93 Difference]: Finished difference Result 43289 states and 60492 transitions. [2020-12-22 13:21:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:21:00,595 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-12-22 13:21:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:00,627 INFO L225 Difference]: With dead ends: 43289 [2020-12-22 13:21:00,627 INFO L226 Difference]: Without dead ends: 21701 [2020-12-22 13:21:00,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:21:00,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21701 states. [2020-12-22 13:21:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21701 to 21701. [2020-12-22 13:21:04,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21701 states. [2020-12-22 13:21:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21701 states to 21701 states and 30251 transitions. [2020-12-22 13:21:04,176 INFO L78 Accepts]: Start accepts. Automaton has 21701 states and 30251 transitions. Word has length 91 [2020-12-22 13:21:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:04,176 INFO L481 AbstractCegarLoop]: Abstraction has 21701 states and 30251 transitions. [2020-12-22 13:21:04,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 13:21:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21701 states and 30251 transitions. [2020-12-22 13:21:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 13:21:04,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:04,193 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:04,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 13:21:04,409 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash 705259788, now seen corresponding path program 3 times [2020-12-22 13:21:04,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:04,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951834326] [2020-12-22 13:21:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:21:04,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951834326] [2020-12-22 13:21:04,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383646193] [2020-12-22 13:21:04,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:21:07,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:21:07,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:21:07,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 2235 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:21:07,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:21:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 13:21:07,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:21:07,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2020-12-22 13:21:07,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704468427] [2020-12-22 13:21:07,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:21:07,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:07,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:21:07,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:21:07,312 INFO L87 Difference]: Start difference. First operand 21701 states and 30251 transitions. Second operand 5 states. [2020-12-22 13:21:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:18,613 INFO L93 Difference]: Finished difference Result 65485 states and 91627 transitions. [2020-12-22 13:21:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:21:18,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-12-22 13:21:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:18,696 INFO L225 Difference]: With dead ends: 65485 [2020-12-22 13:21:18,697 INFO L226 Difference]: Without dead ends: 54362 [2020-12-22 13:21:18,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:21:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54362 states. [2020-12-22 13:21:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54362 to 43749. [2020-12-22 13:21:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43749 states. [2020-12-22 13:21:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43749 states to 43749 states and 61089 transitions. [2020-12-22 13:21:25,557 INFO L78 Accepts]: Start accepts. Automaton has 43749 states and 61089 transitions. Word has length 92 [2020-12-22 13:21:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:25,557 INFO L481 AbstractCegarLoop]: Abstraction has 43749 states and 61089 transitions. [2020-12-22 13:21:25,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:21:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 43749 states and 61089 transitions. [2020-12-22 13:21:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 13:21:25,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:25,570 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:25,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 13:21:25,779 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:25,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1679071605, now seen corresponding path program 1 times [2020-12-22 13:21:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:25,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427718357] [2020-12-22 13:21:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 13:21:25,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427718357] [2020-12-22 13:21:25,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:25,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:21:25,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416387503] [2020-12-22 13:21:25,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:21:25,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:25,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:21:25,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:21:25,968 INFO L87 Difference]: Start difference. First operand 43749 states and 61089 transitions. Second operand 4 states.