/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--phy--dp83640.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:20:14,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:20:14,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:20:15,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:20:15,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:20:15,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:20:15,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:20:15,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:20:15,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:20:15,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:20:15,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:20:15,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:20:15,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:20:15,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:20:15,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:20:15,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:20:15,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:20:15,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:20:15,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:20:15,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:20:15,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:20:15,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:20:15,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:20:15,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:20:15,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:20:15,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:20:15,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:20:15,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:20:15,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:20:15,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:20:15,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:20:15,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:20:15,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:20:15,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:20:15,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:20:15,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:20:15,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:20:15,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:20:15,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:20:15,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:20:15,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:20:15,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:20:15,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:20:15,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:20:15,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:20:15,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:20:15,098 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:20:15,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:20:15,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:20:15,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:20:15,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:20:15,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:20:15,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:20:15,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:20:15,100 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:20:15,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:20:15,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:20:15,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:20:15,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:20:15,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:20:15,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:20:15,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:20:15,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:20:15,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:20:15,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:20:15,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:20:15,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:20:15,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:20:15,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:20:15,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:20:15,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:20:15,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:20:15,517 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:20:15,518 INFO L432 ainManager$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--phy--dp83640.ko-entry_point.cil.out.i [2020-12-22 13:20:15,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6230add99/e783cccec7ba401b86a29f31ce602e50/FLAG8cde7ddd2 [2020-12-22 13:20:16,609 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:20:16,610 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--phy--dp83640.ko-entry_point.cil.out.i [2020-12-22 13:20:16,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6230add99/e783cccec7ba401b86a29f31ce602e50/FLAG8cde7ddd2 [2020-12-22 13:20:17,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6230add99/e783cccec7ba401b86a29f31ce602e50 [2020-12-22 13:20:17,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:20:17,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:20:17,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:20:17,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:20:17,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:20:17,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:20:17" (1/1) ... [2020-12-22 13:20:17,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6006d38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:17, skipping insertion in model container [2020-12-22 13:20:17,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:20:17" (1/1) ... [2020-12-22 13:20:17,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:20:17,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:20:18,293 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--phy--dp83640.ko-entry_point.cil.out.i[160997,161010] [2020-12-22 13:20:18,805 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2020-12-22 13:20:18,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:20:18,835 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:20:19,017 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--phy--dp83640.ko-entry_point.cil.out.i[160997,161010] [2020-12-22 13:20:19,232 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2020-12-22 13:20:19,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:20:19,479 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:20:19,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19 WrapperNode [2020-12-22 13:20:19,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:20:19,481 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:20:19,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:20:19,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:20:19,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:19,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:19,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:20:19,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:20:19,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:20:19,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:20:19,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:19,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:19,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:19,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:20,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:20,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:20,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (1/1) ... [2020-12-22 13:20:20,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:20:20,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:20:20,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:20:20,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:20:20,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (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 13:20:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:20:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:20:20,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:20:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:20:20,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:20:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2020-12-22 13:20:20,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2020-12-22 13:20:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:20:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:20:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:20:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:20:20,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:20:28,399 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:20:28,399 INFO L299 CfgBuilder]: Removed 1870 assume(true) statements. [2020-12-22 13:20:28,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:20:28 BoogieIcfgContainer [2020-12-22 13:20:28,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:20:28,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:20:28,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:20:28,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:20:28,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:20:17" (1/3) ... [2020-12-22 13:20:28,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b15b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:20:28, skipping insertion in model container [2020-12-22 13:20:28,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:19" (2/3) ... [2020-12-22 13:20:28,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b15b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:20:28, skipping insertion in model container [2020-12-22 13:20:28,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:20:28" (3/3) ... [2020-12-22 13:20:28,414 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--phy--dp83640.ko-entry_point.cil.out.i [2020-12-22 13:20:28,421 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:20:28,428 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:20:28,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:20:28,489 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:20:28,489 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:20:28,489 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:20:28,489 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:20:28,489 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:20:28,490 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:20:28,490 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:20:28,490 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:20:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states. [2020-12-22 13:20:28,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 13:20:28,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:28,546 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] [2020-12-22 13:20:28,546 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:28,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1861169288, now seen corresponding path program 1 times [2020-12-22 13:20:28,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:28,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624654804] [2020-12-22 13:20:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:29,089 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 13:20:29,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624654804] [2020-12-22 13:20:29,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:29,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:29,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711480427] [2020-12-22 13:20:29,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:29,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:29,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:29,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:29,116 INFO L87 Difference]: Start difference. First operand 1507 states. Second operand 3 states. [2020-12-22 13:20:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:29,628 INFO L93 Difference]: Finished difference Result 4451 states and 5817 transitions. [2020-12-22 13:20:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:29,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-22 13:20:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:29,677 INFO L225 Difference]: With dead ends: 4451 [2020-12-22 13:20:29,677 INFO L226 Difference]: Without dead ends: 2938 [2020-12-22 13:20:29,691 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 13:20:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2020-12-22 13:20:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2020-12-22 13:20:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2938 states. [2020-12-22 13:20:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 3750 transitions. [2020-12-22 13:20:29,894 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 3750 transitions. Word has length 21 [2020-12-22 13:20:29,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:29,894 INFO L481 AbstractCegarLoop]: Abstraction has 2938 states and 3750 transitions. [2020-12-22 13:20:29,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 3750 transitions. [2020-12-22 13:20:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 13:20:29,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:29,898 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] [2020-12-22 13:20:29,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:20:29,899 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:29,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1125897843, now seen corresponding path program 1 times [2020-12-22 13:20:29,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:29,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763773746] [2020-12-22 13:20:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:30,093 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 13:20:30,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763773746] [2020-12-22 13:20:30,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:30,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:20:30,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939285538] [2020-12-22 13:20:30,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:30,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:30,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:30,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:30,097 INFO L87 Difference]: Start difference. First operand 2938 states and 3750 transitions. Second operand 5 states. [2020-12-22 13:20:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:30,640 INFO L93 Difference]: Finished difference Result 8770 states and 11203 transitions. [2020-12-22 13:20:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:30,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-22 13:20:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:30,671 INFO L225 Difference]: With dead ends: 8770 [2020-12-22 13:20:30,672 INFO L226 Difference]: Without dead ends: 5837 [2020-12-22 13:20:30,681 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 13:20:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5837 states. [2020-12-22 13:20:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5837 to 5813. [2020-12-22 13:20:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5813 states. [2020-12-22 13:20:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5813 states to 5813 states and 7418 transitions. [2020-12-22 13:20:30,915 INFO L78 Accepts]: Start accepts. Automaton has 5813 states and 7418 transitions. Word has length 22 [2020-12-22 13:20:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:30,916 INFO L481 AbstractCegarLoop]: Abstraction has 5813 states and 7418 transitions. [2020-12-22 13:20:30,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 5813 states and 7418 transitions. [2020-12-22 13:20:30,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 13:20:30,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:30,924 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:30,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:20:30,925 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -811032581, now seen corresponding path program 1 times [2020-12-22 13:20:30,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:30,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774526427] [2020-12-22 13:20:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:31,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774526427] [2020-12-22 13:20:31,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:31,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:31,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617221382] [2020-12-22 13:20:31,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:31,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:31,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:31,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:31,067 INFO L87 Difference]: Start difference. First operand 5813 states and 7418 transitions. Second operand 3 states. [2020-12-22 13:20:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:31,418 INFO L93 Difference]: Finished difference Result 11683 states and 14919 transitions. [2020-12-22 13:20:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:31,426 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2020-12-22 13:20:31,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:31,461 INFO L225 Difference]: With dead ends: 11683 [2020-12-22 13:20:31,461 INFO L226 Difference]: Without dead ends: 5891 [2020-12-22 13:20:31,474 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 13:20:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5891 states. [2020-12-22 13:20:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5891 to 5873. [2020-12-22 13:20:31,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5873 states. [2020-12-22 13:20:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5873 states to 5873 states and 7502 transitions. [2020-12-22 13:20:31,851 INFO L78 Accepts]: Start accepts. Automaton has 5873 states and 7502 transitions. Word has length 51 [2020-12-22 13:20:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:31,851 INFO L481 AbstractCegarLoop]: Abstraction has 5873 states and 7502 transitions. [2020-12-22 13:20:31,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 5873 states and 7502 transitions. [2020-12-22 13:20:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 13:20:31,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:31,862 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] [2020-12-22 13:20:31,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:20:31,863 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:31,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1067535698, now seen corresponding path program 1 times [2020-12-22 13:20:31,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:31,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767150597] [2020-12-22 13:20:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:32,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767150597] [2020-12-22 13:20:32,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:32,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:32,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277975122] [2020-12-22 13:20:32,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:32,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:32,087 INFO L87 Difference]: Start difference. First operand 5873 states and 7502 transitions. Second operand 3 states. [2020-12-22 13:20:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:32,726 INFO L93 Difference]: Finished difference Result 11931 states and 15335 transitions. [2020-12-22 13:20:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:32,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 13:20:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:32,759 INFO L225 Difference]: With dead ends: 11931 [2020-12-22 13:20:32,760 INFO L226 Difference]: Without dead ends: 6079 [2020-12-22 13:20:32,771 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 13:20:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6079 states. [2020-12-22 13:20:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6079 to 6061. [2020-12-22 13:20:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6061 states. [2020-12-22 13:20:33,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6061 states to 6061 states and 7758 transitions. [2020-12-22 13:20:33,059 INFO L78 Accepts]: Start accepts. Automaton has 6061 states and 7758 transitions. Word has length 65 [2020-12-22 13:20:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:33,060 INFO L481 AbstractCegarLoop]: Abstraction has 6061 states and 7758 transitions. [2020-12-22 13:20:33,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6061 states and 7758 transitions. [2020-12-22 13:20:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 13:20:33,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:33,067 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] [2020-12-22 13:20:33,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:20:33,068 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:33,070 INFO L82 PathProgramCache]: Analyzing trace with hash 104367796, now seen corresponding path program 1 times [2020-12-22 13:20:33,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:33,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202641368] [2020-12-22 13:20:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:20:33,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202641368] [2020-12-22 13:20:33,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:33,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:33,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763436265] [2020-12-22 13:20:33,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:33,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:33,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:33,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:33,300 INFO L87 Difference]: Start difference. First operand 6061 states and 7758 transitions. Second operand 3 states. [2020-12-22 13:20:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:33,849 INFO L93 Difference]: Finished difference Result 15066 states and 19286 transitions. [2020-12-22 13:20:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:33,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 13:20:33,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:33,921 INFO L225 Difference]: With dead ends: 15066 [2020-12-22 13:20:33,921 INFO L226 Difference]: Without dead ends: 12025 [2020-12-22 13:20:33,931 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 13:20:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12025 states. [2020-12-22 13:20:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12025 to 6073. [2020-12-22 13:20:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6073 states. [2020-12-22 13:20:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 7770 transitions. [2020-12-22 13:20:34,297 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 7770 transitions. Word has length 65 [2020-12-22 13:20:34,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:34,298 INFO L481 AbstractCegarLoop]: Abstraction has 6073 states and 7770 transitions. [2020-12-22 13:20:34,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 7770 transitions. [2020-12-22 13:20:34,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 13:20:34,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:34,305 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] [2020-12-22 13:20:34,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:20:34,305 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:34,306 INFO L82 PathProgramCache]: Analyzing trace with hash 622142579, now seen corresponding path program 1 times [2020-12-22 13:20:34,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:34,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080054380] [2020-12-22 13:20:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:20:34,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080054380] [2020-12-22 13:20:34,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:34,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:34,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219365206] [2020-12-22 13:20:34,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:34,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:34,559 INFO L87 Difference]: Start difference. First operand 6073 states and 7770 transitions. Second operand 4 states. [2020-12-22 13:20:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:35,338 INFO L93 Difference]: Finished difference Result 15072 states and 19271 transitions. [2020-12-22 13:20:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:20:35,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-12-22 13:20:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:35,362 INFO L225 Difference]: With dead ends: 15072 [2020-12-22 13:20:35,363 INFO L226 Difference]: Without dead ends: 9020 [2020-12-22 13:20:35,376 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 13:20:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9020 states. [2020-12-22 13:20:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9020 to 6055. [2020-12-22 13:20:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6055 states. [2020-12-22 13:20:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 7734 transitions. [2020-12-22 13:20:35,690 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 7734 transitions. Word has length 67 [2020-12-22 13:20:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:35,693 INFO L481 AbstractCegarLoop]: Abstraction has 6055 states and 7734 transitions. [2020-12-22 13:20:35,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:35,695 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 7734 transitions. [2020-12-22 13:20:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 13:20:35,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:35,703 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] [2020-12-22 13:20:35,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:20:35,704 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:35,704 INFO L82 PathProgramCache]: Analyzing trace with hash 940016071, now seen corresponding path program 1 times [2020-12-22 13:20:35,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:35,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747043667] [2020-12-22 13:20:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:20:35,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747043667] [2020-12-22 13:20:35,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:35,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:35,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514511555] [2020-12-22 13:20:35,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:35,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:35,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:35,981 INFO L87 Difference]: Start difference. First operand 6055 states and 7734 transitions. Second operand 4 states. [2020-12-22 13:20:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:37,210 INFO L93 Difference]: Finished difference Result 29192 states and 37315 transitions. [2020-12-22 13:20:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:37,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 13:20:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:37,279 INFO L225 Difference]: With dead ends: 29192 [2020-12-22 13:20:37,280 INFO L226 Difference]: Without dead ends: 23158 [2020-12-22 13:20:37,297 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 13:20:37,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23158 states. [2020-12-22 13:20:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23158 to 6087. [2020-12-22 13:20:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6087 states. [2020-12-22 13:20:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 7766 transitions. [2020-12-22 13:20:37,883 INFO L78 Accepts]: Start accepts. Automaton has 6087 states and 7766 transitions. Word has length 81 [2020-12-22 13:20:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:37,883 INFO L481 AbstractCegarLoop]: Abstraction has 6087 states and 7766 transitions. [2020-12-22 13:20:37,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6087 states and 7766 transitions. [2020-12-22 13:20:37,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 13:20:37,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:37,891 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, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:37,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:20:37,891 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1292331796, now seen corresponding path program 1 times [2020-12-22 13:20:37,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:37,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845993052] [2020-12-22 13:20:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:20:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845993052] [2020-12-22 13:20:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572149206] [2020-12-22 13:20:38,121 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 13:20:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:20:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:20:38,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:20:38,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-22 13:20:38,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109969381] [2020-12-22 13:20:38,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:38,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:38,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:38,967 INFO L87 Difference]: Start difference. First operand 6087 states and 7766 transitions. Second operand 5 states. [2020-12-22 13:20:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:40,878 INFO L93 Difference]: Finished difference Result 18309 states and 23414 transitions. [2020-12-22 13:20:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:40,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 88 [2020-12-22 13:20:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:40,916 INFO L225 Difference]: With dead ends: 18309 [2020-12-22 13:20:40,917 INFO L226 Difference]: Without dead ends: 15246 [2020-12-22 13:20:40,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15246 states. [2020-12-22 13:20:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15246 to 12157. [2020-12-22 13:20:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12157 states. [2020-12-22 13:20:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12157 states to 12157 states and 15538 transitions. [2020-12-22 13:20:41,952 INFO L78 Accepts]: Start accepts. Automaton has 12157 states and 15538 transitions. Word has length 88 [2020-12-22 13:20:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:41,953 INFO L481 AbstractCegarLoop]: Abstraction has 12157 states and 15538 transitions. [2020-12-22 13:20:41,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 12157 states and 15538 transitions. [2020-12-22 13:20:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 13:20:41,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:41,961 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:42,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 13:20:42,177 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:42,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:42,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1769669515, now seen corresponding path program 1 times [2020-12-22 13:20:42,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:42,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576558165] [2020-12-22 13:20:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:20:42,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576558165] [2020-12-22 13:20:42,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:42,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:42,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420713940] [2020-12-22 13:20:42,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:42,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:42,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:42,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:42,326 INFO L87 Difference]: Start difference. First operand 12157 states and 15538 transitions. Second operand 4 states. [2020-12-22 13:20:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:43,823 INFO L93 Difference]: Finished difference Result 42331 states and 54139 transitions. [2020-12-22 13:20:43,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:43,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-22 13:20:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:43,899 INFO L225 Difference]: With dead ends: 42331 [2020-12-22 13:20:43,900 INFO L226 Difference]: Without dead ends: 33198 [2020-12-22 13:20:43,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33198 states. [2020-12-22 13:20:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33198 to 12229. [2020-12-22 13:20:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12229 states. [2020-12-22 13:20:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12229 states to 12229 states and 15640 transitions. [2020-12-22 13:20:44,942 INFO L78 Accepts]: Start accepts. Automaton has 12229 states and 15640 transitions. Word has length 90 [2020-12-22 13:20:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:44,943 INFO L481 AbstractCegarLoop]: Abstraction has 12229 states and 15640 transitions. [2020-12-22 13:20:44,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 12229 states and 15640 transitions. [2020-12-22 13:20:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 13:20:44,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:44,952 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:44,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:20:44,952 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:44,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1334233660, now seen corresponding path program 1 times [2020-12-22 13:20:44,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:44,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007034911] [2020-12-22 13:20:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:45,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:20:45,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007034911] [2020-12-22 13:20:45,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:45,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:45,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602584798] [2020-12-22 13:20:45,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:45,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:45,118 INFO L87 Difference]: Start difference. First operand 12229 states and 15640 transitions. Second operand 4 states. [2020-12-22 13:20:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:47,040 INFO L93 Difference]: Finished difference Result 45653 states and 58315 transitions. [2020-12-22 13:20:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:20:47,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2020-12-22 13:20:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:47,102 INFO L225 Difference]: With dead ends: 45653 [2020-12-22 13:20:47,102 INFO L226 Difference]: Without dead ends: 33445 [2020-12-22 13:20:47,131 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 13:20:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33445 states. [2020-12-22 13:20:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33445 to 12261. [2020-12-22 13:20:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12261 states. [2020-12-22 13:20:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12261 states to 12261 states and 15672 transitions. [2020-12-22 13:20:48,126 INFO L78 Accepts]: Start accepts. Automaton has 12261 states and 15672 transitions. Word has length 92 [2020-12-22 13:20:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:48,126 INFO L481 AbstractCegarLoop]: Abstraction has 12261 states and 15672 transitions. [2020-12-22 13:20:48,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 12261 states and 15672 transitions. [2020-12-22 13:20:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 13:20:48,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:48,137 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:48,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:20:48,137 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:48,138 INFO L82 PathProgramCache]: Analyzing trace with hash -736453507, now seen corresponding path program 1 times [2020-12-22 13:20:48,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:48,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726473673] [2020-12-22 13:20:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:50,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726473673] [2020-12-22 13:20:50,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948338864] [2020-12-22 13:20:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:20:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:51,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 13:20:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:20:52,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:20:52,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [22] total 34 [2020-12-22 13:20:52,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582464056] [2020-12-22 13:20:52,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 13:20:52,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:52,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 13:20:52,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 13:20:52,317 INFO L87 Difference]: Start difference. First operand 12261 states and 15672 transitions. Second operand 13 states. [2020-12-22 13:20:57,683 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-12-22 13:21:01,297 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 13:21:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:26,747 INFO L93 Difference]: Finished difference Result 274033 states and 350201 transitions. [2020-12-22 13:21:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-12-22 13:21:26,748 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 93 [2020-12-22 13:21:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:27,346 INFO L225 Difference]: With dead ends: 274033 [2020-12-22 13:21:27,346 INFO L226 Difference]: Without dead ends: 261793 [2020-12-22 13:21:27,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8189 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=2288, Invalid=20362, Unknown=0, NotChecked=0, Total=22650 [2020-12-22 13:21:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261793 states. [2020-12-22 13:21:31,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261793 to 12309. [2020-12-22 13:21:31,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12309 states. [2020-12-22 13:21:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12309 states to 12309 states and 15688 transitions. [2020-12-22 13:21:31,758 INFO L78 Accepts]: Start accepts. Automaton has 12309 states and 15688 transitions. Word has length 93 [2020-12-22 13:21:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:31,758 INFO L481 AbstractCegarLoop]: Abstraction has 12309 states and 15688 transitions. [2020-12-22 13:21:31,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 13:21:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 12309 states and 15688 transitions. [2020-12-22 13:21:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 13:21:31,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:31,765 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:31,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:21:31,978 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:31,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1492370141, now seen corresponding path program 1 times [2020-12-22 13:21:31,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:31,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107947336] [2020-12-22 13:21:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:32,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107947336] [2020-12-22 13:21:32,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:32,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:21:32,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660448934] [2020-12-22 13:21:32,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:21:32,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:21:32,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:21:32,190 INFO L87 Difference]: Start difference. First operand 12309 states and 15688 transitions. Second operand 3 states. [2020-12-22 13:21:34,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:34,603 INFO L93 Difference]: Finished difference Result 24613 states and 31385 transitions. [2020-12-22 13:21:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:21:34,604 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 13:21:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:34,617 INFO L225 Difference]: With dead ends: 24613 [2020-12-22 13:21:34,617 INFO L226 Difference]: Without dead ends: 12325 [2020-12-22 13:21:34,632 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 13:21:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12325 states. [2020-12-22 13:21:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12325 to 12325. [2020-12-22 13:21:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12325 states. [2020-12-22 13:21:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12325 states to 12325 states and 15704 transitions. [2020-12-22 13:21:36,936 INFO L78 Accepts]: Start accepts. Automaton has 12325 states and 15704 transitions. Word has length 95 [2020-12-22 13:21:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:36,937 INFO L481 AbstractCegarLoop]: Abstraction has 12325 states and 15704 transitions. [2020-12-22 13:21:36,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:21:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 12325 states and 15704 transitions. [2020-12-22 13:21:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 13:21:36,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:36,944 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:36,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:21:36,944 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:36,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1269529461, now seen corresponding path program 1 times [2020-12-22 13:21:36,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:36,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26856658] [2020-12-22 13:21:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:37,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26856658] [2020-12-22 13:21:37,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923950615] [2020-12-22 13:21:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:21:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:21:37,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:21:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:37,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:21:37,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:21:37,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066415975] [2020-12-22 13:21:37,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:21:37,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:37,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:21:37,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:21:37,840 INFO L87 Difference]: Start difference. First operand 12325 states and 15704 transitions. Second operand 6 states. [2020-12-22 13:21:40,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:40,234 INFO L93 Difference]: Finished difference Result 24645 states and 31417 transitions. [2020-12-22 13:21:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:21:40,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-12-22 13:21:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:40,252 INFO L225 Difference]: With dead ends: 24645 [2020-12-22 13:21:40,252 INFO L226 Difference]: Without dead ends: 12341 [2020-12-22 13:21:40,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 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 13:21:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12341 states. [2020-12-22 13:21:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12341 to 12341. [2020-12-22 13:21:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12341 states. [2020-12-22 13:21:42,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12341 states to 12341 states and 15720 transitions. [2020-12-22 13:21:42,567 INFO L78 Accepts]: Start accepts. Automaton has 12341 states and 15720 transitions. Word has length 96 [2020-12-22 13:21:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:42,567 INFO L481 AbstractCegarLoop]: Abstraction has 12341 states and 15720 transitions. [2020-12-22 13:21:42,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:21:42,567 INFO L276 IsEmpty]: Start isEmpty. Operand 12341 states and 15720 transitions. [2020-12-22 13:21:42,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 13:21:42,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:42,575 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:42,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 13:21:42,790 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:42,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1343564323, now seen corresponding path program 2 times [2020-12-22 13:21:42,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:42,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175117648] [2020-12-22 13:21:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:42,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175117648] [2020-12-22 13:21:42,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900256375] [2020-12-22 13:21:42,952 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 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 13:21:43,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:21:43,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:21:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:21:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:21:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:44,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:21:44,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:21:44,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281701485] [2020-12-22 13:21:44,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:21:44,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:21:44,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:21:44,092 INFO L87 Difference]: Start difference. First operand 12341 states and 15720 transitions. Second operand 8 states. [2020-12-22 13:21:46,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:46,478 INFO L93 Difference]: Finished difference Result 24677 states and 31449 transitions. [2020-12-22 13:21:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:21:46,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2020-12-22 13:21:46,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:46,491 INFO L225 Difference]: With dead ends: 24677 [2020-12-22 13:21:46,492 INFO L226 Difference]: Without dead ends: 12357 [2020-12-22 13:21:46,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 95 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 13:21:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12357 states. [2020-12-22 13:21:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12357 to 12357. [2020-12-22 13:21:48,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12357 states. [2020-12-22 13:21:48,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12357 states to 12357 states and 15736 transitions. [2020-12-22 13:21:48,587 INFO L78 Accepts]: Start accepts. Automaton has 12357 states and 15736 transitions. Word has length 97 [2020-12-22 13:21:48,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:48,588 INFO L481 AbstractCegarLoop]: Abstraction has 12357 states and 15736 transitions. [2020-12-22 13:21:48,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:21:48,588 INFO L276 IsEmpty]: Start isEmpty. Operand 12357 states and 15736 transitions. [2020-12-22 13:21:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 13:21:48,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:48,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:48,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:21:48,808 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash -745093003, now seen corresponding path program 3 times [2020-12-22 13:21:48,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:48,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811794690] [2020-12-22 13:21:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:49,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811794690] [2020-12-22 13:21:49,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916525247] [2020-12-22 13:21:49,092 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 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 13:21:53,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 13:21:53,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:21:53,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:21:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:21:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:53,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:21:53,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:21:53,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003901943] [2020-12-22 13:21:53,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:21:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:21:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:21:53,787 INFO L87 Difference]: Start difference. First operand 12357 states and 15736 transitions. Second operand 10 states. [2020-12-22 13:21:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:55,938 INFO L93 Difference]: Finished difference Result 24709 states and 31481 transitions. [2020-12-22 13:21:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:21:55,939 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2020-12-22 13:21:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:55,952 INFO L225 Difference]: With dead ends: 24709 [2020-12-22 13:21:55,953 INFO L226 Difference]: Without dead ends: 12373 [2020-12-22 13:21:55,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:21:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12373 states. [2020-12-22 13:21:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12373 to 12373. [2020-12-22 13:21:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12373 states. [2020-12-22 13:21:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12373 states to 12373 states and 15752 transitions. [2020-12-22 13:21:58,183 INFO L78 Accepts]: Start accepts. Automaton has 12373 states and 15752 transitions. Word has length 98 [2020-12-22 13:21:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:58,184 INFO L481 AbstractCegarLoop]: Abstraction has 12373 states and 15752 transitions. [2020-12-22 13:21:58,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:21:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 12373 states and 15752 transitions. [2020-12-22 13:21:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-22 13:21:58,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:58,189 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:58,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 13:21:58,390 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:58,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:58,391 INFO L82 PathProgramCache]: Analyzing trace with hash 627648733, now seen corresponding path program 4 times [2020-12-22 13:21:58,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:58,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446498168] [2020-12-22 13:21:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:58,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446498168] [2020-12-22 13:21:58,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748869971] [2020-12-22 13:21:58,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 13:21:59,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 13:21:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:21:59,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 13:21:59,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:21:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:21:59,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:21:59,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-22 13:21:59,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318630324] [2020-12-22 13:21:59,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 13:21:59,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:59,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 13:21:59,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:21:59,446 INFO L87 Difference]: Start difference. First operand 12373 states and 15752 transitions. Second operand 12 states. [2020-12-22 13:22:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:01,601 INFO L93 Difference]: Finished difference Result 24741 states and 31513 transitions. [2020-12-22 13:22:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:22:01,602 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2020-12-22 13:22:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:01,616 INFO L225 Difference]: With dead ends: 24741 [2020-12-22 13:22:01,616 INFO L226 Difference]: Without dead ends: 12389 [2020-12-22 13:22:01,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 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 13:22:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12389 states. [2020-12-22 13:22:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12389 to 12389. [2020-12-22 13:22:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12389 states. [2020-12-22 13:22:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12389 states to 12389 states and 15768 transitions. [2020-12-22 13:22:03,690 INFO L78 Accepts]: Start accepts. Automaton has 12389 states and 15768 transitions. Word has length 99 [2020-12-22 13:22:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:22:03,690 INFO L481 AbstractCegarLoop]: Abstraction has 12389 states and 15768 transitions. [2020-12-22 13:22:03,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 13:22:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 12389 states and 15768 transitions. [2020-12-22 13:22:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 13:22:03,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:22:03,695 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:22:03,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:03,897 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:22:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:22:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash 232969589, now seen corresponding path program 5 times [2020-12-22 13:22:03,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:22:03,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211128461] [2020-12-22 13:22:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:22:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:04,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211128461] [2020-12-22 13:22:04,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610326256] [2020-12-22 13:22:04,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 13:22:04,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 13:22:04,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:22:04,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 13:22:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:22:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:05,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:22:05,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 13:22:05,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775758172] [2020-12-22 13:22:05,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 13:22:05,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:22:05,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 13:22:05,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:22:05,019 INFO L87 Difference]: Start difference. First operand 12389 states and 15768 transitions. Second operand 14 states. [2020-12-22 13:22:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:07,241 INFO L93 Difference]: Finished difference Result 24773 states and 31545 transitions. [2020-12-22 13:22:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:22:07,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 100 [2020-12-22 13:22:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:07,258 INFO L225 Difference]: With dead ends: 24773 [2020-12-22 13:22:07,258 INFO L226 Difference]: Without dead ends: 12405 [2020-12-22 13:22:07,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:22:07,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12405 states. [2020-12-22 13:22:09,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12405 to 12405. [2020-12-22 13:22:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12405 states. [2020-12-22 13:22:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12405 states to 12405 states and 15784 transitions. [2020-12-22 13:22:09,348 INFO L78 Accepts]: Start accepts. Automaton has 12405 states and 15784 transitions. Word has length 100 [2020-12-22 13:22:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:22:09,348 INFO L481 AbstractCegarLoop]: Abstraction has 12405 states and 15784 transitions. [2020-12-22 13:22:09,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 13:22:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 12405 states and 15784 transitions. [2020-12-22 13:22:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 13:22:09,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:22:09,354 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:22:09,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 13:22:09,565 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:22:09,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:22:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash 882818013, now seen corresponding path program 6 times [2020-12-22 13:22:09,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:22:09,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723743095] [2020-12-22 13:22:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:22:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:09,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723743095] [2020-12-22 13:22:09,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68655601] [2020-12-22 13:22:09,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 13:22:13,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 13:22:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:22:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1280 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 13:22:13,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:22:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:13,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:22:13,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 13:22:13,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341472882] [2020-12-22 13:22:13,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 13:22:13,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:22:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 13:22:13,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:22:13,695 INFO L87 Difference]: Start difference. First operand 12405 states and 15784 transitions. Second operand 16 states. [2020-12-22 13:22:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:15,931 INFO L93 Difference]: Finished difference Result 24805 states and 31577 transitions. [2020-12-22 13:22:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:22:15,932 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 101 [2020-12-22 13:22:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:15,945 INFO L225 Difference]: With dead ends: 24805 [2020-12-22 13:22:15,945 INFO L226 Difference]: Without dead ends: 12421 [2020-12-22 13:22:15,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 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 13:22:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12421 states. [2020-12-22 13:22:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12421 to 12421. [2020-12-22 13:22:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12421 states. [2020-12-22 13:22:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12421 states to 12421 states and 15800 transitions. [2020-12-22 13:22:18,029 INFO L78 Accepts]: Start accepts. Automaton has 12421 states and 15800 transitions. Word has length 101 [2020-12-22 13:22:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:22:18,029 INFO L481 AbstractCegarLoop]: Abstraction has 12421 states and 15800 transitions. [2020-12-22 13:22:18,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 13:22:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 12421 states and 15800 transitions. [2020-12-22 13:22:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 13:22:18,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:22:18,035 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:22:18,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 13:22:18,251 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:22:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:22:18,252 INFO L82 PathProgramCache]: Analyzing trace with hash -446717323, now seen corresponding path program 7 times [2020-12-22 13:22:18,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:22:18,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662734061] [2020-12-22 13:22:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:22:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:18,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662734061] [2020-12-22 13:22:18,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976363143] [2020-12-22 13:22:18,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 13:22:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:22:19,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:22:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:19,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:22:19,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-22 13:22:19,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57957653] [2020-12-22 13:22:19,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 13:22:19,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:22:19,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 13:22:19,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 13:22:19,479 INFO L87 Difference]: Start difference. First operand 12421 states and 15800 transitions. Second operand 18 states. [2020-12-22 13:22:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:21,663 INFO L93 Difference]: Finished difference Result 24837 states and 31609 transitions. [2020-12-22 13:22:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 13:22:21,663 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2020-12-22 13:22:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:21,677 INFO L225 Difference]: With dead ends: 24837 [2020-12-22 13:22:21,677 INFO L226 Difference]: Without dead ends: 12437 [2020-12-22 13:22:21,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2020-12-22 13:22:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12437 states. [2020-12-22 13:22:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12437 to 12437. [2020-12-22 13:22:23,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12437 states. [2020-12-22 13:22:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12437 states to 12437 states and 15816 transitions. [2020-12-22 13:22:23,660 INFO L78 Accepts]: Start accepts. Automaton has 12437 states and 15816 transitions. Word has length 102 [2020-12-22 13:22:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:22:23,661 INFO L481 AbstractCegarLoop]: Abstraction has 12437 states and 15816 transitions. [2020-12-22 13:22:23,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 13:22:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 12437 states and 15816 transitions. [2020-12-22 13:22:23,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 13:22:23,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:22:23,668 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:22:23,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:23,883 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:22:23,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:22:23,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1287360221, now seen corresponding path program 8 times [2020-12-22 13:22:23,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:22:23,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942278818] [2020-12-22 13:22:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:22:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:24,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942278818] [2020-12-22 13:22:24,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81747475] [2020-12-22 13:22:24,110 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:25,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:22:25,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:22:25,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 13:22:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:22:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:25,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:22:25,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-22 13:22:25,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404984570] [2020-12-22 13:22:25,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 13:22:25,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:22:25,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 13:22:25,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:22:25,575 INFO L87 Difference]: Start difference. First operand 12437 states and 15816 transitions. Second operand 20 states. [2020-12-22 13:22:27,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:27,720 INFO L93 Difference]: Finished difference Result 24869 states and 31641 transitions. [2020-12-22 13:22:27,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 13:22:27,720 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-12-22 13:22:27,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:27,736 INFO L225 Difference]: With dead ends: 24869 [2020-12-22 13:22:27,736 INFO L226 Difference]: Without dead ends: 12453 [2020-12-22 13:22:27,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:22:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12453 states. [2020-12-22 13:22:29,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12453 to 12453. [2020-12-22 13:22:29,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12453 states. [2020-12-22 13:22:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12453 states to 12453 states and 15832 transitions. [2020-12-22 13:22:29,863 INFO L78 Accepts]: Start accepts. Automaton has 12453 states and 15832 transitions. Word has length 103 [2020-12-22 13:22:29,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:22:29,863 INFO L481 AbstractCegarLoop]: Abstraction has 12453 states and 15832 transitions. [2020-12-22 13:22:29,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 13:22:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 12453 states and 15832 transitions. [2020-12-22 13:22:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 13:22:29,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:22:29,869 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:22:30,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:30,070 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:22:30,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:22:30,071 INFO L82 PathProgramCache]: Analyzing trace with hash -790810763, now seen corresponding path program 9 times [2020-12-22 13:22:30,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:22:30,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671523086] [2020-12-22 13:22:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:22:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:30,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671523086] [2020-12-22 13:22:30,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694183081] [2020-12-22 13:22:30,342 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:44,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 13:22:44,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:22:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 13:22:44,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:22:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:44,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:22:44,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-22 13:22:44,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938509520] [2020-12-22 13:22:44,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 13:22:44,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:22:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 13:22:44,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-22 13:22:44,851 INFO L87 Difference]: Start difference. First operand 12453 states and 15832 transitions. Second operand 22 states. [2020-12-22 13:22:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:47,033 INFO L93 Difference]: Finished difference Result 24901 states and 31673 transitions. [2020-12-22 13:22:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 13:22:47,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-12-22 13:22:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:47,054 INFO L225 Difference]: With dead ends: 24901 [2020-12-22 13:22:47,054 INFO L226 Difference]: Without dead ends: 12469 [2020-12-22 13:22:47,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2020-12-22 13:22:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2020-12-22 13:22:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 12469. [2020-12-22 13:22:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12469 states. [2020-12-22 13:22:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12469 states to 12469 states and 15848 transitions. [2020-12-22 13:22:49,198 INFO L78 Accepts]: Start accepts. Automaton has 12469 states and 15848 transitions. Word has length 104 [2020-12-22 13:22:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:22:49,199 INFO L481 AbstractCegarLoop]: Abstraction has 12469 states and 15848 transitions. [2020-12-22 13:22:49,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 13:22:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 12469 states and 15848 transitions. [2020-12-22 13:22:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 13:22:49,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:22:49,205 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:22:49,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 13:22:49,411 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:22:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:22:49,412 INFO L82 PathProgramCache]: Analyzing trace with hash -789601827, now seen corresponding path program 10 times [2020-12-22 13:22:49,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:22:49,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273924256] [2020-12-22 13:22:49,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:22:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:49,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273924256] [2020-12-22 13:22:49,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162079100] [2020-12-22 13:22:49,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:50,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 13:22:50,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:22:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 13:22:50,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:22:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:50,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:22:50,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 13:22:50,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842686518] [2020-12-22 13:22:50,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 13:22:50,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:22:50,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 13:22:50,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2020-12-22 13:22:50,868 INFO L87 Difference]: Start difference. First operand 12469 states and 15848 transitions. Second operand 24 states. [2020-12-22 13:22:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:53,164 INFO L93 Difference]: Finished difference Result 24933 states and 31705 transitions. [2020-12-22 13:22:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 13:22:53,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-12-22 13:22:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:53,181 INFO L225 Difference]: With dead ends: 24933 [2020-12-22 13:22:53,181 INFO L226 Difference]: Without dead ends: 12485 [2020-12-22 13:22:53,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2020-12-22 13:22:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2020-12-22 13:22:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 12485. [2020-12-22 13:22:55,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12485 states. [2020-12-22 13:22:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12485 states to 12485 states and 15864 transitions. [2020-12-22 13:22:55,142 INFO L78 Accepts]: Start accepts. Automaton has 12485 states and 15864 transitions. Word has length 105 [2020-12-22 13:22:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:22:55,142 INFO L481 AbstractCegarLoop]: Abstraction has 12485 states and 15864 transitions. [2020-12-22 13:22:55,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 13:22:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 12485 states and 15864 transitions. [2020-12-22 13:22:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 13:22:55,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:22:55,149 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:22:55,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:55,356 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:22:55,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:22:55,357 INFO L82 PathProgramCache]: Analyzing trace with hash -752124811, now seen corresponding path program 11 times [2020-12-22 13:22:55,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:22:55,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911614971] [2020-12-22 13:22:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:22:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:55,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911614971] [2020-12-22 13:22:55,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751312887] [2020-12-22 13:22:55,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:56,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 13:22:56,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:22:56,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 13:22:56,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:22:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:22:56,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:22:56,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-22 13:22:56,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921226357] [2020-12-22 13:22:56,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 13:22:56,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:22:56,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 13:22:56,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-12-22 13:22:56,937 INFO L87 Difference]: Start difference. First operand 12485 states and 15864 transitions. Second operand 26 states. [2020-12-22 13:22:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:59,340 INFO L93 Difference]: Finished difference Result 24965 states and 31737 transitions. [2020-12-22 13:22:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 13:22:59,341 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 106 [2020-12-22 13:22:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:59,356 INFO L225 Difference]: With dead ends: 24965 [2020-12-22 13:22:59,356 INFO L226 Difference]: Without dead ends: 12501 [2020-12-22 13:22:59,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-12-22 13:22:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12501 states. [2020-12-22 13:23:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12501 to 12501. [2020-12-22 13:23:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12501 states. [2020-12-22 13:23:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12501 states to 12501 states and 15880 transitions. [2020-12-22 13:23:01,497 INFO L78 Accepts]: Start accepts. Automaton has 12501 states and 15880 transitions. Word has length 106 [2020-12-22 13:23:01,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:01,497 INFO L481 AbstractCegarLoop]: Abstraction has 12501 states and 15880 transitions. [2020-12-22 13:23:01,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 13:23:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 12501 states and 15880 transitions. [2020-12-22 13:23:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 13:23:01,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:01,502 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:01,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 13:23:01,709 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:01,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:01,710 INFO L82 PathProgramCache]: Analyzing trace with hash 409662685, now seen corresponding path program 12 times [2020-12-22 13:23:01,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:01,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529414246] [2020-12-22 13:23:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:02,080 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:23:02,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529414246] [2020-12-22 13:23:02,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616323254] [2020-12-22 13:23:02,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:23:15,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 13:23:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:23:15,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1316 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 13:23:15,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:23:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:23:16,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:23:16,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-12-22 13:23:16,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231857574] [2020-12-22 13:23:16,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 13:23:16,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:16,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 13:23:16,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2020-12-22 13:23:16,250 INFO L87 Difference]: Start difference. First operand 12501 states and 15880 transitions. Second operand 28 states. [2020-12-22 13:23:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:18,523 INFO L93 Difference]: Finished difference Result 24997 states and 31769 transitions. [2020-12-22 13:23:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 13:23:18,524 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2020-12-22 13:23:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:18,540 INFO L225 Difference]: With dead ends: 24997 [2020-12-22 13:23:18,540 INFO L226 Difference]: Without dead ends: 12517 [2020-12-22 13:23:18,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2020-12-22 13:23:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12517 states. [2020-12-22 13:23:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12517 to 12517. [2020-12-22 13:23:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12517 states. [2020-12-22 13:23:20,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12517 states to 12517 states and 15896 transitions. [2020-12-22 13:23:20,689 INFO L78 Accepts]: Start accepts. Automaton has 12517 states and 15896 transitions. Word has length 107 [2020-12-22 13:23:20,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:20,689 INFO L481 AbstractCegarLoop]: Abstraction has 12517 states and 15896 transitions. [2020-12-22 13:23:20,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 13:23:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 12517 states and 15896 transitions. [2020-12-22 13:23:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 13:23:20,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:20,693 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:20,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:23:20,894 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:20,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:20,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2065336693, now seen corresponding path program 13 times [2020-12-22 13:23:20,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:20,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046531213] [2020-12-22 13:23:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:23:21,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046531213] [2020-12-22 13:23:21,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916754844] [2020-12-22 13:23:21,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:23:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:21,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 13:23:21,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:23:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 8 proven. 91 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:23:22,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:23:22,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-22 13:23:22,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765422063] [2020-12-22 13:23:22,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 13:23:22,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 13:23:22,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-22 13:23:22,636 INFO L87 Difference]: Start difference. First operand 12517 states and 15896 transitions. Second operand 30 states. [2020-12-22 13:23:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:24,995 INFO L93 Difference]: Finished difference Result 25029 states and 31801 transitions. [2020-12-22 13:23:24,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 13:23:24,996 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 108 [2020-12-22 13:23:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:25,009 INFO L225 Difference]: With dead ends: 25029 [2020-12-22 13:23:25,010 INFO L226 Difference]: Without dead ends: 12533 [2020-12-22 13:23:25,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2020-12-22 13:23:25,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12533 states. [2020-12-22 13:23:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12533 to 12533. [2020-12-22 13:23:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12533 states. [2020-12-22 13:23:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12533 states to 12533 states and 15912 transitions. [2020-12-22 13:23:26,991 INFO L78 Accepts]: Start accepts. Automaton has 12533 states and 15912 transitions. Word has length 108 [2020-12-22 13:23:26,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:26,992 INFO L481 AbstractCegarLoop]: Abstraction has 12533 states and 15912 transitions. [2020-12-22 13:23:26,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 13:23:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 12533 states and 15912 transitions. [2020-12-22 13:23:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 13:23:26,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:26,997 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:27,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 13:23:27,212 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:27,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:27,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1160069006, now seen corresponding path program 1 times [2020-12-22 13:23:27,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:27,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348633329] [2020-12-22 13:23:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:23:27,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348633329] [2020-12-22 13:23:27,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:27,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:27,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891796828] [2020-12-22 13:23:27,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:27,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:27,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:27,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:27,307 INFO L87 Difference]: Start difference. First operand 12533 states and 15912 transitions. Second operand 3 states. [2020-12-22 13:23:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:30,788 INFO L93 Difference]: Finished difference Result 32035 states and 41040 transitions. [2020-12-22 13:23:30,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:30,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-22 13:23:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:30,812 INFO L225 Difference]: With dead ends: 32035 [2020-12-22 13:23:30,812 INFO L226 Difference]: Without dead ends: 19523 [2020-12-22 13:23:30,826 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 13:23:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2020-12-22 13:23:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 11925. [2020-12-22 13:23:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11925 states. [2020-12-22 13:23:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 15000 transitions. [2020-12-22 13:23:32,934 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 15000 transitions. Word has length 109 [2020-12-22 13:23:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:32,934 INFO L481 AbstractCegarLoop]: Abstraction has 11925 states and 15000 transitions. [2020-12-22 13:23:32,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 15000 transitions. [2020-12-22 13:23:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 13:23:32,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:32,938 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:32,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 13:23:32,939 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash -663827244, now seen corresponding path program 1 times [2020-12-22 13:23:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:32,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561344648] [2020-12-22 13:23:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:23:33,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561344648] [2020-12-22 13:23:33,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:33,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:33,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788805401] [2020-12-22 13:23:33,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:33,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:33,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:33,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:33,056 INFO L87 Difference]: Start difference. First operand 11925 states and 15000 transitions. Second operand 3 states. [2020-12-22 13:23:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:37,110 INFO L93 Difference]: Finished difference Result 34483 states and 43376 transitions. [2020-12-22 13:23:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:37,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2020-12-22 13:23:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:37,134 INFO L225 Difference]: With dead ends: 34483 [2020-12-22 13:23:37,134 INFO L226 Difference]: Without dead ends: 22579 [2020-12-22 13:23:37,145 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 13:23:37,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22579 states. [2020-12-22 13:23:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22579 to 11909. [2020-12-22 13:23:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11909 states. [2020-12-22 13:23:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11909 states to 11909 states and 14960 transitions. [2020-12-22 13:23:39,199 INFO L78 Accepts]: Start accepts. Automaton has 11909 states and 14960 transitions. Word has length 109 [2020-12-22 13:23:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:39,199 INFO L481 AbstractCegarLoop]: Abstraction has 11909 states and 14960 transitions. [2020-12-22 13:23:39,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 11909 states and 14960 transitions. [2020-12-22 13:23:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 13:23:39,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:39,203 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:39,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 13:23:39,203 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:39,204 INFO L82 PathProgramCache]: Analyzing trace with hash 15445010, now seen corresponding path program 1 times [2020-12-22 13:23:39,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:39,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293916926] [2020-12-22 13:23:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:23:39,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293916926] [2020-12-22 13:23:39,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:39,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 13:23:39,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167702500] [2020-12-22 13:23:39,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:23:39,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:39,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:23:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:23:39,917 INFO L87 Difference]: Start difference. First operand 11909 states and 14960 transitions. Second operand 10 states. [2020-12-22 13:23:51,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:51,033 INFO L93 Difference]: Finished difference Result 56162 states and 70765 transitions. [2020-12-22 13:23:51,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 13:23:51,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2020-12-22 13:23:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:51,084 INFO L225 Difference]: With dead ends: 56162 [2020-12-22 13:23:51,085 INFO L226 Difference]: Without dead ends: 44274 [2020-12-22 13:23:51,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2020-12-22 13:23:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44274 states. [2020-12-22 13:23:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44274 to 11933. [2020-12-22 13:23:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11933 states. [2020-12-22 13:23:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11933 states to 11933 states and 14984 transitions. [2020-12-22 13:23:53,996 INFO L78 Accepts]: Start accepts. Automaton has 11933 states and 14984 transitions. Word has length 109 [2020-12-22 13:23:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:53,996 INFO L481 AbstractCegarLoop]: Abstraction has 11933 states and 14984 transitions. [2020-12-22 13:23:53,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:23:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 11933 states and 14984 transitions. [2020-12-22 13:23:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 13:23:54,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:54,000 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:54,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 13:23:54,000 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -511061056, now seen corresponding path program 1 times [2020-12-22 13:23:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:54,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248630015] [2020-12-22 13:23:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:23:54,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248630015] [2020-12-22 13:23:54,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:54,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 13:23:54,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251835031] [2020-12-22 13:23:54,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:23:54,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:54,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:23:54,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:23:54,784 INFO L87 Difference]: Start difference. First operand 11933 states and 14984 transitions. Second operand 10 states. [2020-12-22 13:24:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:07,565 INFO L93 Difference]: Finished difference Result 56186 states and 70781 transitions. [2020-12-22 13:24:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 13:24:07,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2020-12-22 13:24:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:07,611 INFO L225 Difference]: With dead ends: 56186 [2020-12-22 13:24:07,612 INFO L226 Difference]: Without dead ends: 44274 [2020-12-22 13:24:07,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2020-12-22 13:24:07,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44274 states.