/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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:16:41,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:16:41,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:16:41,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 08:16:41,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 08:16:41,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 08:16:41,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 08:16:41,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 08:16:41,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 08:16:41,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 08:16:41,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 08:16:41,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 08:16:41,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:16:41,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:16:41,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:16:41,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:16:41,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:16:41,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:16:41,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:16:41,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:16:41,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:16:41,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:16:41,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:16:41,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:16:41,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 08:16:41,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 08:16:41,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 08:16:41,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 08:16:41,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 08:16:41,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 08:16:41,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 08:16:41,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 08:16:41,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 08:16:41,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 08:16:41,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 08:16:41,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 08:16:41,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 08:16:41,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 08:16:41,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:16:41,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:16:41,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:16:41,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:16:41,589 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:16:41,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:16:41,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:16:41,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:16:41,595 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:16:41,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:16:41,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:16:41,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:16:41,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:16:41,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:16:41,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:16:41,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:16:41,597 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:16:41,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:16:41,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:16:41,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:16:41,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:16:41,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:16:41,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:16:41,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:16:41,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:16:41,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:16:41,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:16:41,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:16:41,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:16:41,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:16:41,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:16:42,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:16:42,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:16:42,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:16:42,014 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:16:42,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-12-22 08:16:42,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f957ca325/2b024a05e54f4bbaba9de08851fddaec/FLAG7e193902d [2020-12-22 08:16:42,918 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:16:42,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-12-22 08:16:42,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f957ca325/2b024a05e54f4bbaba9de08851fddaec/FLAG7e193902d [2020-12-22 08:16:43,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f957ca325/2b024a05e54f4bbaba9de08851fddaec [2020-12-22 08:16:43,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:16:43,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:16:43,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:16:43,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:16:43,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:16:43,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:16:43" (1/1) ... [2020-12-22 08:16:43,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6c398d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:43, skipping insertion in model container [2020-12-22 08:16:43,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:16:43" (1/1) ... [2020-12-22 08:16:43,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:16:43,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:16:43,543 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8218,8231] [2020-12-22 08:16:43,618 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[14685,14698] [2020-12-22 08:16:43,649 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[16882,16895] [2020-12-22 08:16:43,667 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[17906,17919] [2020-12-22 08:16:43,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:16:43,957 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:16:43,995 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[8218,8231] [2020-12-22 08:16:44,017 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[14685,14698] [2020-12-22 08:16:44,027 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[16882,16895] [2020-12-22 08:16:44,032 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/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c[17906,17919] [2020-12-22 08:16:44,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:16:44,167 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:16:44,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44 WrapperNode [2020-12-22 08:16:44,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:16:44,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:16:44,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:16:44,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:16:44,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:16:44,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:16:44,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:16:44,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:16:44,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (1/1) ... [2020-12-22 08:16:44,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:16:44,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:16:44,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:16:44,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:16:44,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (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 08:16:44,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:16:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:16:44,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:16:44,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:16:46,668 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:16:46,669 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:16:46,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:16:46 BoogieIcfgContainer [2020-12-22 08:16:46,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:16:46,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:16:46,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:16:46,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:16:46,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:16:43" (1/3) ... [2020-12-22 08:16:46,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741cfc23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:16:46, skipping insertion in model container [2020-12-22 08:16:46,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:16:44" (2/3) ... [2020-12-22 08:16:46,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741cfc23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:16:46, skipping insertion in model container [2020-12-22 08:16:46,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:16:46" (3/3) ... [2020-12-22 08:16:46,680 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-12-22 08:16:46,686 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:16:46,691 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-22 08:16:46,709 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-22 08:16:46,738 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:16:46,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:16:46,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:16:46,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:16:46,739 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:16:46,739 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:16:46,739 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:16:46,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:16:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states. [2020-12-22 08:16:46,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:16:46,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:46,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:46,781 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash 881754525, now seen corresponding path program 1 times [2020-12-22 08:16:46,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:46,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728226056] [2020-12-22 08:16:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:47,212 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 08:16:47,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728226056] [2020-12-22 08:16:47,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:47,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:47,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919262894] [2020-12-22 08:16:47,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:47,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:47,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:47,237 INFO L87 Difference]: Start difference. First operand 442 states. Second operand 3 states. [2020-12-22 08:16:47,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:47,401 INFO L93 Difference]: Finished difference Result 690 states and 1215 transitions. [2020-12-22 08:16:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:47,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:16:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:47,443 INFO L225 Difference]: With dead ends: 690 [2020-12-22 08:16:47,443 INFO L226 Difference]: Without dead ends: 546 [2020-12-22 08:16:47,449 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 08:16:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-12-22 08:16:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 540. [2020-12-22 08:16:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-12-22 08:16:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 715 transitions. [2020-12-22 08:16:47,530 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 715 transitions. Word has length 50 [2020-12-22 08:16:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:47,531 INFO L481 AbstractCegarLoop]: Abstraction has 540 states and 715 transitions. [2020-12-22 08:16:47,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 715 transitions. [2020-12-22 08:16:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:16:47,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:47,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:47,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:16:47,537 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:47,538 INFO L82 PathProgramCache]: Analyzing trace with hash -88586633, now seen corresponding path program 1 times [2020-12-22 08:16:47,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:47,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503159934] [2020-12-22 08:16:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:47,704 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 08:16:47,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503159934] [2020-12-22 08:16:47,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:47,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:47,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976115409] [2020-12-22 08:16:47,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:47,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:47,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:47,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:47,709 INFO L87 Difference]: Start difference. First operand 540 states and 715 transitions. Second operand 3 states. [2020-12-22 08:16:47,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:47,812 INFO L93 Difference]: Finished difference Result 955 states and 1317 transitions. [2020-12-22 08:16:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:47,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:16:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:47,818 INFO L225 Difference]: With dead ends: 955 [2020-12-22 08:16:47,818 INFO L226 Difference]: Without dead ends: 714 [2020-12-22 08:16:47,820 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 08:16:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-12-22 08:16:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 708. [2020-12-22 08:16:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-12-22 08:16:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 953 transitions. [2020-12-22 08:16:47,865 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 953 transitions. Word has length 50 [2020-12-22 08:16:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:47,865 INFO L481 AbstractCegarLoop]: Abstraction has 708 states and 953 transitions. [2020-12-22 08:16:47,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 953 transitions. [2020-12-22 08:16:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:16:47,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:47,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:47,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:16:47,868 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:47,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:47,869 INFO L82 PathProgramCache]: Analyzing trace with hash 301591798, now seen corresponding path program 1 times [2020-12-22 08:16:47,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:47,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629944982] [2020-12-22 08:16:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:48,043 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 08:16:48,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629944982] [2020-12-22 08:16:48,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:48,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:16:48,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195434892] [2020-12-22 08:16:48,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:16:48,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:16:48,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:16:48,052 INFO L87 Difference]: Start difference. First operand 708 states and 953 transitions. Second operand 3 states. [2020-12-22 08:16:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:48,192 INFO L93 Difference]: Finished difference Result 1364 states and 1888 transitions. [2020-12-22 08:16:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:16:48,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:16:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:48,205 INFO L225 Difference]: With dead ends: 1364 [2020-12-22 08:16:48,205 INFO L226 Difference]: Without dead ends: 1035 [2020-12-22 08:16:48,207 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 08:16:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-12-22 08:16:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1028. [2020-12-22 08:16:48,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2020-12-22 08:16:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1397 transitions. [2020-12-22 08:16:48,274 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1397 transitions. Word has length 50 [2020-12-22 08:16:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:48,277 INFO L481 AbstractCegarLoop]: Abstraction has 1028 states and 1397 transitions. [2020-12-22 08:16:48,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:16:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1397 transitions. [2020-12-22 08:16:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:16:48,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:48,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:48,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:16:48,283 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:48,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:48,284 INFO L82 PathProgramCache]: Analyzing trace with hash 157307916, now seen corresponding path program 1 times [2020-12-22 08:16:48,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:48,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701979540] [2020-12-22 08:16:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:48,466 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 08:16:48,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701979540] [2020-12-22 08:16:48,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:48,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:48,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247653632] [2020-12-22 08:16:48,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:16:48,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:48,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:16:48,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:16:48,469 INFO L87 Difference]: Start difference. First operand 1028 states and 1397 transitions. Second operand 6 states. [2020-12-22 08:16:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:49,118 INFO L93 Difference]: Finished difference Result 2560 states and 3556 transitions. [2020-12-22 08:16:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:49,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2020-12-22 08:16:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:49,130 INFO L225 Difference]: With dead ends: 2560 [2020-12-22 08:16:49,130 INFO L226 Difference]: Without dead ends: 1698 [2020-12-22 08:16:49,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:16:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2020-12-22 08:16:49,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1678. [2020-12-22 08:16:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1678 states. [2020-12-22 08:16:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2333 transitions. [2020-12-22 08:16:49,237 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2333 transitions. Word has length 50 [2020-12-22 08:16:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:49,237 INFO L481 AbstractCegarLoop]: Abstraction has 1678 states and 2333 transitions. [2020-12-22 08:16:49,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:16:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2333 transitions. [2020-12-22 08:16:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:16:49,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:49,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:49,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:16:49,240 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:49,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:49,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1701829494, now seen corresponding path program 1 times [2020-12-22 08:16:49,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:49,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290372543] [2020-12-22 08:16:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:49,352 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 08:16:49,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290372543] [2020-12-22 08:16:49,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:49,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:16:49,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041344251] [2020-12-22 08:16:49,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:16:49,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:16:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:16:49,355 INFO L87 Difference]: Start difference. First operand 1678 states and 2333 transitions. Second operand 5 states. [2020-12-22 08:16:49,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:49,831 INFO L93 Difference]: Finished difference Result 3697 states and 5183 transitions. [2020-12-22 08:16:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:49,832 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 08:16:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:49,844 INFO L225 Difference]: With dead ends: 3697 [2020-12-22 08:16:49,844 INFO L226 Difference]: Without dead ends: 2200 [2020-12-22 08:16:49,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2020-12-22 08:16:49,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1610. [2020-12-22 08:16:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1610 states. [2020-12-22 08:16:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2232 transitions. [2020-12-22 08:16:49,970 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2232 transitions. Word has length 51 [2020-12-22 08:16:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:49,970 INFO L481 AbstractCegarLoop]: Abstraction has 1610 states and 2232 transitions. [2020-12-22 08:16:49,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:16:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2232 transitions. [2020-12-22 08:16:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 08:16:49,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:49,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:49,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:16:49,973 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:49,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1906241974, now seen corresponding path program 1 times [2020-12-22 08:16:49,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:49,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798730881] [2020-12-22 08:16:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:50,067 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 08:16:50,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798730881] [2020-12-22 08:16:50,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:50,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:16:50,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477814038] [2020-12-22 08:16:50,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:16:50,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:50,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:16:50,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:16:50,070 INFO L87 Difference]: Start difference. First operand 1610 states and 2232 transitions. Second operand 6 states. [2020-12-22 08:16:50,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:50,652 INFO L93 Difference]: Finished difference Result 4590 states and 6418 transitions. [2020-12-22 08:16:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:16:50,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-22 08:16:50,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:50,670 INFO L225 Difference]: With dead ends: 4590 [2020-12-22 08:16:50,670 INFO L226 Difference]: Without dead ends: 3099 [2020-12-22 08:16:50,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:16:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2020-12-22 08:16:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 3064. [2020-12-22 08:16:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3064 states. [2020-12-22 08:16:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 4271 transitions. [2020-12-22 08:16:50,915 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 4271 transitions. Word has length 51 [2020-12-22 08:16:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:50,915 INFO L481 AbstractCegarLoop]: Abstraction has 3064 states and 4271 transitions. [2020-12-22 08:16:50,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:16:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 4271 transitions. [2020-12-22 08:16:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:16:50,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:50,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:50,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:16:50,924 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:50,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1198562519, now seen corresponding path program 1 times [2020-12-22 08:16:50,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:50,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233070049] [2020-12-22 08:16:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:51,054 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 08:16:51,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233070049] [2020-12-22 08:16:51,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:51,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:16:51,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815107961] [2020-12-22 08:16:51,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:16:51,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:16:51,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:51,058 INFO L87 Difference]: Start difference. First operand 3064 states and 4271 transitions. Second operand 7 states. [2020-12-22 08:16:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:52,549 INFO L93 Difference]: Finished difference Result 11705 states and 16575 transitions. [2020-12-22 08:16:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:52,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-12-22 08:16:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:52,602 INFO L225 Difference]: With dead ends: 11705 [2020-12-22 08:16:52,602 INFO L226 Difference]: Without dead ends: 10653 [2020-12-22 08:16:52,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:16:52,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10653 states. [2020-12-22 08:16:52,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10653 to 3076. [2020-12-22 08:16:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3076 states. [2020-12-22 08:16:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3076 states to 3076 states and 4287 transitions. [2020-12-22 08:16:52,961 INFO L78 Accepts]: Start accepts. Automaton has 3076 states and 4287 transitions. Word has length 52 [2020-12-22 08:16:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:52,962 INFO L481 AbstractCegarLoop]: Abstraction has 3076 states and 4287 transitions. [2020-12-22 08:16:52,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:16:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3076 states and 4287 transitions. [2020-12-22 08:16:52,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:16:52,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:52,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:52,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:16:52,965 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1743373944, now seen corresponding path program 1 times [2020-12-22 08:16:52,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:52,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611341234] [2020-12-22 08:16:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:53,116 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 08:16:53,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611341234] [2020-12-22 08:16:53,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:53,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:16:53,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911684356] [2020-12-22 08:16:53,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:16:53,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:16:53,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:53,120 INFO L87 Difference]: Start difference. First operand 3076 states and 4287 transitions. Second operand 7 states. [2020-12-22 08:16:54,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:54,535 INFO L93 Difference]: Finished difference Result 10386 states and 14639 transitions. [2020-12-22 08:16:54,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:54,536 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-12-22 08:16:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:54,578 INFO L225 Difference]: With dead ends: 10386 [2020-12-22 08:16:54,578 INFO L226 Difference]: Without dead ends: 8947 [2020-12-22 08:16:54,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:16:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8947 states. [2020-12-22 08:16:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8947 to 3090. [2020-12-22 08:16:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3090 states. [2020-12-22 08:16:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 4305 transitions. [2020-12-22 08:16:54,954 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 4305 transitions. Word has length 53 [2020-12-22 08:16:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:54,954 INFO L481 AbstractCegarLoop]: Abstraction has 3090 states and 4305 transitions. [2020-12-22 08:16:54,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:16:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 4305 transitions. [2020-12-22 08:16:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 08:16:54,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:54,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:54,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:16:54,958 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1359815673, now seen corresponding path program 1 times [2020-12-22 08:16:54,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:54,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309048151] [2020-12-22 08:16:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:55,070 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 08:16:55,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309048151] [2020-12-22 08:16:55,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:55,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:16:55,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744718580] [2020-12-22 08:16:55,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 08:16:55,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:55,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 08:16:55,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:16:55,072 INFO L87 Difference]: Start difference. First operand 3090 states and 4305 transitions. Second operand 7 states. [2020-12-22 08:16:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:56,910 INFO L93 Difference]: Finished difference Result 11395 states and 16181 transitions. [2020-12-22 08:16:56,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:56,910 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-12-22 08:16:56,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:56,934 INFO L225 Difference]: With dead ends: 11395 [2020-12-22 08:16:56,934 INFO L226 Difference]: Without dead ends: 10189 [2020-12-22 08:16:56,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:16:56,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10189 states. [2020-12-22 08:16:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10189 to 3112. [2020-12-22 08:16:57,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3112 states. [2020-12-22 08:16:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 4336 transitions. [2020-12-22 08:16:57,433 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 4336 transitions. Word has length 53 [2020-12-22 08:16:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:57,433 INFO L481 AbstractCegarLoop]: Abstraction has 3112 states and 4336 transitions. [2020-12-22 08:16:57,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 08:16:57,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 4336 transitions. [2020-12-22 08:16:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:16:57,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:57,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:57,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:16:57,437 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1681497036, now seen corresponding path program 1 times [2020-12-22 08:16:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:57,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006035198] [2020-12-22 08:16:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:57,607 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 08:16:57,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006035198] [2020-12-22 08:16:57,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:57,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 08:16:57,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766781367] [2020-12-22 08:16:57,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 08:16:57,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:57,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 08:16:57,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:16:57,609 INFO L87 Difference]: Start difference. First operand 3112 states and 4336 transitions. Second operand 8 states. [2020-12-22 08:16:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:16:59,178 INFO L93 Difference]: Finished difference Result 8298 states and 11734 transitions. [2020-12-22 08:16:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 08:16:59,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-12-22 08:16:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:16:59,191 INFO L225 Difference]: With dead ends: 8298 [2020-12-22 08:16:59,191 INFO L226 Difference]: Without dead ends: 5839 [2020-12-22 08:16:59,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-22 08:16:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2020-12-22 08:16:59,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 3112. [2020-12-22 08:16:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3112 states. [2020-12-22 08:16:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 4331 transitions. [2020-12-22 08:16:59,546 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 4331 transitions. Word has length 54 [2020-12-22 08:16:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:16:59,548 INFO L481 AbstractCegarLoop]: Abstraction has 3112 states and 4331 transitions. [2020-12-22 08:16:59,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 08:16:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 4331 transitions. [2020-12-22 08:16:59,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:16:59,551 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:16:59,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:59,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:16:59,551 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:16:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:16:59,552 INFO L82 PathProgramCache]: Analyzing trace with hash 711155878, now seen corresponding path program 1 times [2020-12-22 08:16:59,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:16:59,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809987978] [2020-12-22 08:16:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:16:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:16:59,722 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 08:16:59,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809987978] [2020-12-22 08:16:59,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:16:59,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:16:59,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785218513] [2020-12-22 08:16:59,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:16:59,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:16:59,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:16:59,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:16:59,726 INFO L87 Difference]: Start difference. First operand 3112 states and 4331 transitions. Second operand 9 states. [2020-12-22 08:17:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:01,859 INFO L93 Difference]: Finished difference Result 12159 states and 17382 transitions. [2020-12-22 08:17:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 08:17:01,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-22 08:17:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:01,880 INFO L225 Difference]: With dead ends: 12159 [2020-12-22 08:17:01,881 INFO L226 Difference]: Without dead ends: 9967 [2020-12-22 08:17:01,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-12-22 08:17:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9967 states. [2020-12-22 08:17:02,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9967 to 3078. [2020-12-22 08:17:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3078 states. [2020-12-22 08:17:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 4285 transitions. [2020-12-22 08:17:02,345 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 4285 transitions. Word has length 54 [2020-12-22 08:17:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:02,345 INFO L481 AbstractCegarLoop]: Abstraction has 3078 states and 4285 transitions. [2020-12-22 08:17:02,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:17:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 4285 transitions. [2020-12-22 08:17:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:17:02,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:02,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:02,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:17:02,348 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash -839465653, now seen corresponding path program 1 times [2020-12-22 08:17:02,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:02,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083990539] [2020-12-22 08:17:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:02,492 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 08:17:02,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083990539] [2020-12-22 08:17:02,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:02,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:17:02,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342885128] [2020-12-22 08:17:02,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:17:02,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:02,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:17:02,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:17:02,495 INFO L87 Difference]: Start difference. First operand 3078 states and 4285 transitions. Second operand 9 states. [2020-12-22 08:17:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:04,456 INFO L93 Difference]: Finished difference Result 6845 states and 9729 transitions. [2020-12-22 08:17:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:17:04,457 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-12-22 08:17:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:04,480 INFO L225 Difference]: With dead ends: 6845 [2020-12-22 08:17:04,480 INFO L226 Difference]: Without dead ends: 6840 [2020-12-22 08:17:04,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:17:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6840 states. [2020-12-22 08:17:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6840 to 3078. [2020-12-22 08:17:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3078 states. [2020-12-22 08:17:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 4283 transitions. [2020-12-22 08:17:05,013 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 4283 transitions. Word has length 54 [2020-12-22 08:17:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:05,014 INFO L481 AbstractCegarLoop]: Abstraction has 3078 states and 4283 transitions. [2020-12-22 08:17:05,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:17:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 4283 transitions. [2020-12-22 08:17:05,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:17:05,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:05,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:05,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:17:05,017 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:05,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1126690749, now seen corresponding path program 1 times [2020-12-22 08:17:05,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:05,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838388340] [2020-12-22 08:17:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:05,065 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 08:17:05,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838388340] [2020-12-22 08:17:05,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:05,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727579950] [2020-12-22 08:17:05,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:05,067 INFO L87 Difference]: Start difference. First operand 3078 states and 4283 transitions. Second operand 3 states. [2020-12-22 08:17:05,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:05,431 INFO L93 Difference]: Finished difference Result 4212 states and 5855 transitions. [2020-12-22 08:17:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:05,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 08:17:05,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:05,434 INFO L225 Difference]: With dead ends: 4212 [2020-12-22 08:17:05,435 INFO L226 Difference]: Without dead ends: 2973 [2020-12-22 08:17:05,436 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 08:17:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2020-12-22 08:17:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2971. [2020-12-22 08:17:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2971 states. [2020-12-22 08:17:05,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 4061 transitions. [2020-12-22 08:17:05,834 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 4061 transitions. Word has length 55 [2020-12-22 08:17:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:05,834 INFO L481 AbstractCegarLoop]: Abstraction has 2971 states and 4061 transitions. [2020-12-22 08:17:05,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:05,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 4061 transitions. [2020-12-22 08:17:05,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:17:05,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:05,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:05,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:17:05,837 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:05,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1317678866, now seen corresponding path program 1 times [2020-12-22 08:17:05,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:05,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237377629] [2020-12-22 08:17:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:05,892 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 08:17:05,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237377629] [2020-12-22 08:17:05,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:05,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:05,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781252627] [2020-12-22 08:17:05,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:05,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:05,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:05,895 INFO L87 Difference]: Start difference. First operand 2971 states and 4061 transitions. Second operand 3 states. [2020-12-22 08:17:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:06,367 INFO L93 Difference]: Finished difference Result 4270 states and 5867 transitions. [2020-12-22 08:17:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:06,368 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 08:17:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:06,372 INFO L225 Difference]: With dead ends: 4270 [2020-12-22 08:17:06,372 INFO L226 Difference]: Without dead ends: 2978 [2020-12-22 08:17:06,374 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 08:17:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2020-12-22 08:17:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 2971. [2020-12-22 08:17:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2971 states. [2020-12-22 08:17:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 4008 transitions. [2020-12-22 08:17:06,890 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 4008 transitions. Word has length 55 [2020-12-22 08:17:06,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:06,890 INFO L481 AbstractCegarLoop]: Abstraction has 2971 states and 4008 transitions. [2020-12-22 08:17:06,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 4008 transitions. [2020-12-22 08:17:06,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 08:17:06,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:06,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:06,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:17:06,894 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:06,895 INFO L82 PathProgramCache]: Analyzing trace with hash -944081870, now seen corresponding path program 1 times [2020-12-22 08:17:06,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:06,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246591317] [2020-12-22 08:17:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:06,947 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 08:17:06,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246591317] [2020-12-22 08:17:06,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:06,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:06,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150541628] [2020-12-22 08:17:06,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:06,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:06,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:06,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:06,950 INFO L87 Difference]: Start difference. First operand 2971 states and 4008 transitions. Second operand 3 states. [2020-12-22 08:17:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:07,319 INFO L93 Difference]: Finished difference Result 4323 states and 5857 transitions. [2020-12-22 08:17:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:07,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-22 08:17:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:07,328 INFO L225 Difference]: With dead ends: 4323 [2020-12-22 08:17:07,328 INFO L226 Difference]: Without dead ends: 2977 [2020-12-22 08:17:07,332 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 08:17:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2020-12-22 08:17:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2971. [2020-12-22 08:17:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2971 states. [2020-12-22 08:17:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 3962 transitions. [2020-12-22 08:17:07,822 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 3962 transitions. Word has length 55 [2020-12-22 08:17:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:07,823 INFO L481 AbstractCegarLoop]: Abstraction has 2971 states and 3962 transitions. [2020-12-22 08:17:07,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 3962 transitions. [2020-12-22 08:17:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:17:07,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:07,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:07,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:17:07,827 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash -599519829, now seen corresponding path program 1 times [2020-12-22 08:17:07,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:07,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420744947] [2020-12-22 08:17:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:07,876 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 08:17:07,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420744947] [2020-12-22 08:17:07,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:07,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:07,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093399049] [2020-12-22 08:17:07,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:07,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:07,881 INFO L87 Difference]: Start difference. First operand 2971 states and 3962 transitions. Second operand 3 states. [2020-12-22 08:17:08,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:08,413 INFO L93 Difference]: Finished difference Result 5578 states and 7555 transitions. [2020-12-22 08:17:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:08,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 08:17:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:08,417 INFO L225 Difference]: With dead ends: 5578 [2020-12-22 08:17:08,417 INFO L226 Difference]: Without dead ends: 4014 [2020-12-22 08:17:08,418 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 08:17:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2020-12-22 08:17:08,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 2872. [2020-12-22 08:17:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2872 states. [2020-12-22 08:17:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 3836 transitions. [2020-12-22 08:17:08,753 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 3836 transitions. Word has length 57 [2020-12-22 08:17:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:08,753 INFO L481 AbstractCegarLoop]: Abstraction has 2872 states and 3836 transitions. [2020-12-22 08:17:08,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 3836 transitions. [2020-12-22 08:17:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:17:08,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:08,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:08,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:17:08,756 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash -953719962, now seen corresponding path program 1 times [2020-12-22 08:17:08,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:08,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70301999] [2020-12-22 08:17:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:09,443 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 08:17:09,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70301999] [2020-12-22 08:17:09,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:09,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-12-22 08:17:09,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340282969] [2020-12-22 08:17:09,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 08:17:09,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:09,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 08:17:09,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-12-22 08:17:09,445 INFO L87 Difference]: Start difference. First operand 2872 states and 3836 transitions. Second operand 19 states. [2020-12-22 08:17:09,640 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-12-22 08:17:10,644 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 08:17:10,943 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 08:17:11,181 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 08:17:11,370 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-12-22 08:17:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:16,633 INFO L93 Difference]: Finished difference Result 8980 states and 12353 transitions. [2020-12-22 08:17:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:17:16,634 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-12-22 08:17:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:16,642 INFO L225 Difference]: With dead ends: 8980 [2020-12-22 08:17:16,642 INFO L226 Difference]: Without dead ends: 8976 [2020-12-22 08:17:16,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 08:17:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8976 states. [2020-12-22 08:17:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8976 to 2884. [2020-12-22 08:17:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2884 states. [2020-12-22 08:17:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 3853 transitions. [2020-12-22 08:17:17,114 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 3853 transitions. Word has length 57 [2020-12-22 08:17:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:17,114 INFO L481 AbstractCegarLoop]: Abstraction has 2884 states and 3853 transitions. [2020-12-22 08:17:17,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 08:17:17,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 3853 transitions. [2020-12-22 08:17:17,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:17:17,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:17,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:17,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:17:17,117 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:17,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1381909423, now seen corresponding path program 1 times [2020-12-22 08:17:17,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:17,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614159437] [2020-12-22 08:17:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:17,738 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 08:17:17,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614159437] [2020-12-22 08:17:17,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:17,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-12-22 08:17:17,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817651208] [2020-12-22 08:17:17,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 08:17:17,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 08:17:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-12-22 08:17:17,741 INFO L87 Difference]: Start difference. First operand 2884 states and 3853 transitions. Second operand 19 states. [2020-12-22 08:17:17,998 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-12-22 08:17:18,875 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 08:17:19,176 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 08:17:19,535 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:17:19,792 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-22 08:17:20,046 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 08:17:20,255 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-12-22 08:17:20,476 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:17:20,735 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:17:20,884 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-12-22 08:17:24,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:24,521 INFO L93 Difference]: Finished difference Result 7502 states and 10289 transitions. [2020-12-22 08:17:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 08:17:24,521 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2020-12-22 08:17:24,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:24,527 INFO L225 Difference]: With dead ends: 7502 [2020-12-22 08:17:24,528 INFO L226 Difference]: Without dead ends: 7496 [2020-12-22 08:17:24,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 08:17:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7496 states. [2020-12-22 08:17:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7496 to 2884. [2020-12-22 08:17:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2884 states. [2020-12-22 08:17:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 3852 transitions. [2020-12-22 08:17:24,994 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 3852 transitions. Word has length 57 [2020-12-22 08:17:24,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:24,994 INFO L481 AbstractCegarLoop]: Abstraction has 2884 states and 3852 transitions. [2020-12-22 08:17:24,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 08:17:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 3852 transitions. [2020-12-22 08:17:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:17:24,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:24,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:24,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:17:24,997 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:24,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:24,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1915022361, now seen corresponding path program 1 times [2020-12-22 08:17:24,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:24,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548541423] [2020-12-22 08:17:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:25,486 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 08:17:25,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548541423] [2020-12-22 08:17:25,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:25,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:17:25,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225551468] [2020-12-22 08:17:25,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:17:25,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:25,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:17:25,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:17:25,494 INFO L87 Difference]: Start difference. First operand 2884 states and 3852 transitions. Second operand 12 states. [2020-12-22 08:17:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:27,695 INFO L93 Difference]: Finished difference Result 6367 states and 8653 transitions. [2020-12-22 08:17:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:17:27,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-22 08:17:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:27,700 INFO L225 Difference]: With dead ends: 6367 [2020-12-22 08:17:27,700 INFO L226 Difference]: Without dead ends: 6169 [2020-12-22 08:17:27,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2020-12-22 08:17:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6169 states. [2020-12-22 08:17:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6169 to 2872. [2020-12-22 08:17:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2872 states. [2020-12-22 08:17:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 3839 transitions. [2020-12-22 08:17:28,241 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 3839 transitions. Word has length 57 [2020-12-22 08:17:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:28,241 INFO L481 AbstractCegarLoop]: Abstraction has 2872 states and 3839 transitions. [2020-12-22 08:17:28,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:17:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 3839 transitions. [2020-12-22 08:17:28,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:17:28,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:28,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:28,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:17:28,244 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:28,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:28,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1918440678, now seen corresponding path program 1 times [2020-12-22 08:17:28,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:28,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389805691] [2020-12-22 08:17:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:28,692 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 08:17:28,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389805691] [2020-12-22 08:17:28,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:28,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-12-22 08:17:28,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295027322] [2020-12-22 08:17:28,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:17:28,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:28,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:17:28,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:17:28,694 INFO L87 Difference]: Start difference. First operand 2872 states and 3839 transitions. Second operand 17 states. [2020-12-22 08:17:28,830 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-12-22 08:17:35,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:35,225 INFO L93 Difference]: Finished difference Result 11037 states and 15237 transitions. [2020-12-22 08:17:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 08:17:35,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-12-22 08:17:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:35,240 INFO L225 Difference]: With dead ends: 11037 [2020-12-22 08:17:35,240 INFO L226 Difference]: Without dead ends: 11033 [2020-12-22 08:17:35,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 08:17:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11033 states. [2020-12-22 08:17:35,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11033 to 2872. [2020-12-22 08:17:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2872 states. [2020-12-22 08:17:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 3838 transitions. [2020-12-22 08:17:35,881 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 3838 transitions. Word has length 57 [2020-12-22 08:17:35,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:35,881 INFO L481 AbstractCegarLoop]: Abstraction has 2872 states and 3838 transitions. [2020-12-22 08:17:35,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:17:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 3838 transitions. [2020-12-22 08:17:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:17:35,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:35,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:35,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:17:35,884 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:35,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1081657391, now seen corresponding path program 1 times [2020-12-22 08:17:35,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:35,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512137069] [2020-12-22 08:17:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:35,920 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 08:17:35,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512137069] [2020-12-22 08:17:35,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:35,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:35,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996163904] [2020-12-22 08:17:35,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:35,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:35,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:35,922 INFO L87 Difference]: Start difference. First operand 2872 states and 3838 transitions. Second operand 3 states. [2020-12-22 08:17:36,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:36,852 INFO L93 Difference]: Finished difference Result 5524 states and 7475 transitions. [2020-12-22 08:17:36,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:36,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-22 08:17:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:36,857 INFO L225 Difference]: With dead ends: 5524 [2020-12-22 08:17:36,857 INFO L226 Difference]: Without dead ends: 3959 [2020-12-22 08:17:36,859 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 08:17:36,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2020-12-22 08:17:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2823. [2020-12-22 08:17:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2823 states. [2020-12-22 08:17:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2823 states to 2823 states and 3770 transitions. [2020-12-22 08:17:37,489 INFO L78 Accepts]: Start accepts. Automaton has 2823 states and 3770 transitions. Word has length 57 [2020-12-22 08:17:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:37,489 INFO L481 AbstractCegarLoop]: Abstraction has 2823 states and 3770 transitions. [2020-12-22 08:17:37,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2823 states and 3770 transitions. [2020-12-22 08:17:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:17:37,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:37,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:37,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:17:37,491 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1608398161, now seen corresponding path program 1 times [2020-12-22 08:17:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:37,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603133416] [2020-12-22 08:17:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:37,849 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 08:17:37,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603133416] [2020-12-22 08:17:37,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:37,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 08:17:37,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8829133] [2020-12-22 08:17:37,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 08:17:37,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:37,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 08:17:37,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 08:17:37,851 INFO L87 Difference]: Start difference. First operand 2823 states and 3770 transitions. Second operand 12 states. [2020-12-22 08:17:38,315 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 08:17:38,469 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 08:17:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:41,667 INFO L93 Difference]: Finished difference Result 6345 states and 8638 transitions. [2020-12-22 08:17:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 08:17:41,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2020-12-22 08:17:41,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:41,675 INFO L225 Difference]: With dead ends: 6345 [2020-12-22 08:17:41,675 INFO L226 Difference]: Without dead ends: 6341 [2020-12-22 08:17:41,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2020-12-22 08:17:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6341 states. [2020-12-22 08:17:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6341 to 2819. [2020-12-22 08:17:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2020-12-22 08:17:42,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3766 transitions. [2020-12-22 08:17:42,355 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3766 transitions. Word has length 58 [2020-12-22 08:17:42,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:42,356 INFO L481 AbstractCegarLoop]: Abstraction has 2819 states and 3766 transitions. [2020-12-22 08:17:42,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 08:17:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3766 transitions. [2020-12-22 08:17:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:17:42,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:42,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:42,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:17:42,358 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:42,358 INFO L82 PathProgramCache]: Analyzing trace with hash 433372011, now seen corresponding path program 1 times [2020-12-22 08:17:42,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:42,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158388510] [2020-12-22 08:17:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:42,973 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 08:17:42,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158388510] [2020-12-22 08:17:42,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:42,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-12-22 08:17:42,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180332908] [2020-12-22 08:17:42,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 08:17:42,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:42,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 08:17:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-12-22 08:17:42,975 INFO L87 Difference]: Start difference. First operand 2819 states and 3766 transitions. Second operand 15 states. [2020-12-22 08:17:43,309 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 08:17:43,455 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 08:17:43,598 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-12-22 08:17:43,820 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 08:17:44,104 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 08:17:44,304 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 08:17:44,563 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 08:17:44,761 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 08:17:45,068 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-12-22 08:17:45,251 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:17:45,595 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:17:48,707 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 08:17:48,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:48,986 INFO L93 Difference]: Finished difference Result 9087 states and 12413 transitions. [2020-12-22 08:17:48,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 08:17:48,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-12-22 08:17:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:48,994 INFO L225 Difference]: With dead ends: 9087 [2020-12-22 08:17:48,994 INFO L226 Difference]: Without dead ends: 8852 [2020-12-22 08:17:48,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2020-12-22 08:17:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2020-12-22 08:17:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 2810. [2020-12-22 08:17:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2810 states. [2020-12-22 08:17:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 3754 transitions. [2020-12-22 08:17:49,699 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 3754 transitions. Word has length 58 [2020-12-22 08:17:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:49,699 INFO L481 AbstractCegarLoop]: Abstraction has 2810 states and 3754 transitions. [2020-12-22 08:17:49,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 08:17:49,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 3754 transitions. [2020-12-22 08:17:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:17:49,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:49,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:49,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:17:49,702 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:49,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2109512119, now seen corresponding path program 1 times [2020-12-22 08:17:49,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:49,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591781244] [2020-12-22 08:17:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:49,780 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 08:17:49,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591781244] [2020-12-22 08:17:49,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:49,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:49,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168270387] [2020-12-22 08:17:49,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:49,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:49,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:49,785 INFO L87 Difference]: Start difference. First operand 2810 states and 3754 transitions. Second operand 3 states. [2020-12-22 08:17:51,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:51,020 INFO L93 Difference]: Finished difference Result 6415 states and 8711 transitions. [2020-12-22 08:17:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:51,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 08:17:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:51,031 INFO L225 Difference]: With dead ends: 6415 [2020-12-22 08:17:51,032 INFO L226 Difference]: Without dead ends: 4433 [2020-12-22 08:17:51,034 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 08:17:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2020-12-22 08:17:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 4431. [2020-12-22 08:17:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4431 states. [2020-12-22 08:17:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 5904 transitions. [2020-12-22 08:17:52,293 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 5904 transitions. Word has length 66 [2020-12-22 08:17:52,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:52,308 INFO L481 AbstractCegarLoop]: Abstraction has 4431 states and 5904 transitions. [2020-12-22 08:17:52,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 5904 transitions. [2020-12-22 08:17:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:17:52,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:52,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:52,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:17:52,312 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1089617976, now seen corresponding path program 1 times [2020-12-22 08:17:52,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:52,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615586341] [2020-12-22 08:17:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:52,382 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 08:17:52,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615586341] [2020-12-22 08:17:52,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:52,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:17:52,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086283794] [2020-12-22 08:17:52,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:17:52,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:17:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:52,384 INFO L87 Difference]: Start difference. First operand 4431 states and 5904 transitions. Second operand 5 states. [2020-12-22 08:17:53,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:53,577 INFO L93 Difference]: Finished difference Result 4437 states and 5907 transitions. [2020-12-22 08:17:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:17:53,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 08:17:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:53,581 INFO L225 Difference]: With dead ends: 4437 [2020-12-22 08:17:53,582 INFO L226 Difference]: Without dead ends: 4053 [2020-12-22 08:17:53,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:17:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2020-12-22 08:17:54,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 4049. [2020-12-22 08:17:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4049 states. [2020-12-22 08:17:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 5404 transitions. [2020-12-22 08:17:54,756 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 5404 transitions. Word has length 67 [2020-12-22 08:17:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:54,756 INFO L481 AbstractCegarLoop]: Abstraction has 4049 states and 5404 transitions. [2020-12-22 08:17:54,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:17:54,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 5404 transitions. [2020-12-22 08:17:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:17:54,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:54,759 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:54,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:17:54,759 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:54,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:54,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1950278783, now seen corresponding path program 1 times [2020-12-22 08:17:54,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:54,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83998944] [2020-12-22 08:17:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:54,804 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 08:17:54,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83998944] [2020-12-22 08:17:54,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:54,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:54,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83131990] [2020-12-22 08:17:54,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:54,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:54,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:54,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:54,806 INFO L87 Difference]: Start difference. First operand 4049 states and 5404 transitions. Second operand 3 states. [2020-12-22 08:17:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:17:56,892 INFO L93 Difference]: Finished difference Result 10251 states and 13820 transitions. [2020-12-22 08:17:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:17:56,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:17:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:17:56,899 INFO L225 Difference]: With dead ends: 10251 [2020-12-22 08:17:56,899 INFO L226 Difference]: Without dead ends: 6829 [2020-12-22 08:17:56,902 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 08:17:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2020-12-22 08:17:58,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 6463. [2020-12-22 08:17:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6463 states. [2020-12-22 08:17:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6463 states to 6463 states and 8623 transitions. [2020-12-22 08:17:58,766 INFO L78 Accepts]: Start accepts. Automaton has 6463 states and 8623 transitions. Word has length 68 [2020-12-22 08:17:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:17:58,766 INFO L481 AbstractCegarLoop]: Abstraction has 6463 states and 8623 transitions. [2020-12-22 08:17:58,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:17:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 6463 states and 8623 transitions. [2020-12-22 08:17:58,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:17:58,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:17:58,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:17:58,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:17:58,769 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:17:58,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:17:58,769 INFO L82 PathProgramCache]: Analyzing trace with hash 427404410, now seen corresponding path program 1 times [2020-12-22 08:17:58,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:17:58,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466148283] [2020-12-22 08:17:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:17:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:17:58,813 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 08:17:58,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466148283] [2020-12-22 08:17:58,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:17:58,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:17:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110012812] [2020-12-22 08:17:58,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:17:58,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:17:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:17:58,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:17:58,815 INFO L87 Difference]: Start difference. First operand 6463 states and 8623 transitions. Second operand 3 states. [2020-12-22 08:18:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:02,426 INFO L93 Difference]: Finished difference Result 17491 states and 23493 transitions. [2020-12-22 08:18:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:02,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-22 08:18:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:02,444 INFO L225 Difference]: With dead ends: 17491 [2020-12-22 08:18:02,444 INFO L226 Difference]: Without dead ends: 11679 [2020-12-22 08:18:02,452 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 08:18:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11679 states. [2020-12-22 08:18:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11679 to 10789. [2020-12-22 08:18:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10789 states. [2020-12-22 08:18:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10789 states to 10789 states and 14353 transitions. [2020-12-22 08:18:05,912 INFO L78 Accepts]: Start accepts. Automaton has 10789 states and 14353 transitions. Word has length 68 [2020-12-22 08:18:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:05,913 INFO L481 AbstractCegarLoop]: Abstraction has 10789 states and 14353 transitions. [2020-12-22 08:18:05,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:05,913 INFO L276 IsEmpty]: Start isEmpty. Operand 10789 states and 14353 transitions. [2020-12-22 08:18:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:18:05,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:05,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:05,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 08:18:05,915 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash -2114357008, now seen corresponding path program 1 times [2020-12-22 08:18:05,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:05,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846345759] [2020-12-22 08:18:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:05,963 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 08:18:05,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846345759] [2020-12-22 08:18:05,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:05,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:05,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912882468] [2020-12-22 08:18:05,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:05,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:05,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:05,965 INFO L87 Difference]: Start difference. First operand 10789 states and 14353 transitions. Second operand 3 states. [2020-12-22 08:18:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:12,455 INFO L93 Difference]: Finished difference Result 29873 states and 39763 transitions. [2020-12-22 08:18:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:12,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-22 08:18:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:12,474 INFO L225 Difference]: With dead ends: 29873 [2020-12-22 08:18:12,474 INFO L226 Difference]: Without dead ends: 19735 [2020-12-22 08:18:12,483 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 08:18:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19735 states. [2020-12-22 08:18:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19735 to 17957. [2020-12-22 08:18:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17957 states. [2020-12-22 08:18:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17957 states to 17957 states and 23649 transitions. [2020-12-22 08:18:18,406 INFO L78 Accepts]: Start accepts. Automaton has 17957 states and 23649 transitions. Word has length 70 [2020-12-22 08:18:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:18,407 INFO L481 AbstractCegarLoop]: Abstraction has 17957 states and 23649 transitions. [2020-12-22 08:18:18,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17957 states and 23649 transitions. [2020-12-22 08:18:18,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:18:18,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:18,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:18,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-22 08:18:18,409 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash 2105959165, now seen corresponding path program 1 times [2020-12-22 08:18:18,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:18,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908943002] [2020-12-22 08:18:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:18,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:18,497 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 08:18:18,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908943002] [2020-12-22 08:18:18,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:18,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:18:18,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590873935] [2020-12-22 08:18:18,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:18:18,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:18,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:18:18,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:18:18,499 INFO L87 Difference]: Start difference. First operand 17957 states and 23649 transitions. Second operand 6 states. [2020-12-22 08:18:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:29,754 INFO L93 Difference]: Finished difference Result 31702 states and 41231 transitions. [2020-12-22 08:18:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 08:18:29,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-12-22 08:18:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:29,784 INFO L225 Difference]: With dead ends: 31702 [2020-12-22 08:18:29,784 INFO L226 Difference]: Without dead ends: 31700 [2020-12-22 08:18:29,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:18:29,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31700 states. [2020-12-22 08:18:36,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31700 to 18941. [2020-12-22 08:18:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18941 states. [2020-12-22 08:18:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18941 states to 18941 states and 24633 transitions. [2020-12-22 08:18:36,441 INFO L78 Accepts]: Start accepts. Automaton has 18941 states and 24633 transitions. Word has length 72 [2020-12-22 08:18:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:36,441 INFO L481 AbstractCegarLoop]: Abstraction has 18941 states and 24633 transitions. [2020-12-22 08:18:36,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:18:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 18941 states and 24633 transitions. [2020-12-22 08:18:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-22 08:18:36,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:36,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:36,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-22 08:18:36,443 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:36,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1422452613, now seen corresponding path program 1 times [2020-12-22 08:18:36,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:36,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92008958] [2020-12-22 08:18:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:36,490 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 08:18:36,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92008958] [2020-12-22 08:18:36,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:18:36,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:18:36,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997841763] [2020-12-22 08:18:36,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:18:36,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:18:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:18:36,492 INFO L87 Difference]: Start difference. First operand 18941 states and 24633 transitions. Second operand 3 states. [2020-12-22 08:18:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:18:45,766 INFO L93 Difference]: Finished difference Result 45653 states and 59075 transitions. [2020-12-22 08:18:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:18:45,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-22 08:18:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:18:45,793 INFO L225 Difference]: With dead ends: 45653 [2020-12-22 08:18:45,794 INFO L226 Difference]: Without dead ends: 27363 [2020-12-22 08:18:45,810 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 08:18:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27363 states. [2020-12-22 08:18:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27363 to 27361. [2020-12-22 08:18:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27361 states. [2020-12-22 08:18:55,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27361 states to 27361 states and 35005 transitions. [2020-12-22 08:18:55,561 INFO L78 Accepts]: Start accepts. Automaton has 27361 states and 35005 transitions. Word has length 73 [2020-12-22 08:18:55,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:18:55,561 INFO L481 AbstractCegarLoop]: Abstraction has 27361 states and 35005 transitions. [2020-12-22 08:18:55,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:18:55,561 INFO L276 IsEmpty]: Start isEmpty. Operand 27361 states and 35005 transitions. [2020-12-22 08:18:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 08:18:55,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:18:55,567 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:18:55,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 08:18:55,567 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:18:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:18:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1725210313, now seen corresponding path program 1 times [2020-12-22 08:18:55,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:18:55,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385541058] [2020-12-22 08:18:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:18:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:18:55,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385541058] [2020-12-22 08:18:55,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634877319] [2020-12-22 08:18:55,820 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 08:18:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:18:56,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 08:18:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:18:56,612 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 08:18:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:18:57,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 08:18:57,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 08:18:57,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275263015] [2020-12-22 08:18:57,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:18:57,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:18:57,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:18:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:18:57,009 INFO L87 Difference]: Start difference. First operand 27361 states and 35005 transitions. Second operand 17 states. [2020-12-22 08:19:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:19:39,719 INFO L93 Difference]: Finished difference Result 110976 states and 140773 transitions. [2020-12-22 08:19:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 08:19:39,719 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-12-22 08:19:39,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:19:39,900 INFO L225 Difference]: With dead ends: 110976 [2020-12-22 08:19:39,900 INFO L226 Difference]: Without dead ends: 97382 [2020-12-22 08:19:39,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=884, Invalid=2776, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 08:19:40,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97382 states. [2020-12-22 08:19:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97382 to 37449. [2020-12-22 08:19:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37449 states. [2020-12-22 08:19:55,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37449 states to 37449 states and 47945 transitions. [2020-12-22 08:19:55,424 INFO L78 Accepts]: Start accepts. Automaton has 37449 states and 47945 transitions. Word has length 92 [2020-12-22 08:19:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:19:55,424 INFO L481 AbstractCegarLoop]: Abstraction has 37449 states and 47945 transitions. [2020-12-22 08:19:55,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:19:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 37449 states and 47945 transitions. [2020-12-22 08:19:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:19:55,443 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:19:55,443 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 08:19:55,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 08:19:55,659 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:19:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:19:55,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1339395570, now seen corresponding path program 1 times [2020-12-22 08:19:55,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:19:55,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572462859] [2020-12-22 08:19:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:19:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:55,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572462859] [2020-12-22 08:19:55,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579098722] [2020-12-22 08:19:55,791 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 08:19:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:19:56,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 08:19:56,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 08:19:56,168 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-12-22 08:19:56,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 08:19:56,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 08:19:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:19:56,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 08:19:56,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 13 [2020-12-22 08:19:56,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208891452] [2020-12-22 08:19:56,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:19:56,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:19:56,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:19:56,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:19:56,625 INFO L87 Difference]: Start difference. First operand 37449 states and 47945 transitions. Second operand 10 states. [2020-12-22 08:19:56,789 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-12-22 08:20:00,617 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 08:20:01,220 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 08:20:01,882 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 08:20:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:20:24,914 INFO L93 Difference]: Finished difference Result 78879 states and 100662 transitions. [2020-12-22 08:20:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 08:20:24,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-12-22 08:20:24,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:20:24,989 INFO L225 Difference]: With dead ends: 78879 [2020-12-22 08:20:24,990 INFO L226 Difference]: Without dead ends: 61137 [2020-12-22 08:20:25,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2020-12-22 08:20:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61137 states. [2020-12-22 08:20:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61137 to 47541. [2020-12-22 08:20:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47541 states. [2020-12-22 08:20:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47541 states to 47541 states and 60875 transitions. [2020-12-22 08:20:44,320 INFO L78 Accepts]: Start accepts. Automaton has 47541 states and 60875 transitions. Word has length 93 [2020-12-22 08:20:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:20:44,321 INFO L481 AbstractCegarLoop]: Abstraction has 47541 states and 60875 transitions. [2020-12-22 08:20:44,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:20:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 47541 states and 60875 transitions. [2020-12-22 08:20:44,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 08:20:44,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:20:44,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:20:44,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 08:20:44,537 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:20:44,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:20:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash -485800157, now seen corresponding path program 1 times [2020-12-22 08:20:44,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:20:44,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304321859] [2020-12-22 08:20:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:20:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:20:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:20:44,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304321859] [2020-12-22 08:20:44,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:20:44,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:20:44,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575157796] [2020-12-22 08:20:44,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:20:44,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:20:44,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:20:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:20:44,598 INFO L87 Difference]: Start difference. First operand 47541 states and 60875 transitions. Second operand 3 states.