/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.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:00:33,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:00:33,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:00:33,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:00:33,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:00:33,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:00:33,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:00:33,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:00:33,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:00:33,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:00:33,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:00:33,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:00:33,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:00:33,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:00:33,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:00:33,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:00:33,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:00:33,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:00:33,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:00:33,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:00:33,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:00:33,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:00:33,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:00:33,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:00:33,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:00:33,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:00:33,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:00:33,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:00:33,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:00:33,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:00:33,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:00:33,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:00:33,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:00:33,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:00:33,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:00:33,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:00:33,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:00:33,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:00:33,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:00:33,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:00:33,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:00:33,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:00:33,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:00:33,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:00:33,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:00:33,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:00:33,487 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:00:33,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:00:33,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:00:33,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:00:33,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:00:33,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:00:33,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:00:33,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:00:33,489 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:00:33,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:00:33,489 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:00:33,489 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:00:33,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:00:33,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:00:33,490 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:00:33,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:00:33,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:00:33,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:00:33,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:00:33,491 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:00:33,491 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:00:33,492 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:00:33,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:00:33,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:00:33,893 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:00:33,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:00:33,896 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:00:33,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:00:33,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d33aaee3/ba531b2a7a2f4d06b9c236ab52e980b9/FLAG30d4c7abd [2020-12-22 09:00:34,739 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:00:34,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:00:34,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d33aaee3/ba531b2a7a2f4d06b9c236ab52e980b9/FLAG30d4c7abd [2020-12-22 09:00:35,033 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d33aaee3/ba531b2a7a2f4d06b9c236ab52e980b9 [2020-12-22 09:00:35,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:00:35,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:00:35,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:00:35,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:00:35,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:00:35,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:35,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2b8f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35, skipping insertion in model container [2020-12-22 09:00:35,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:35,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:00:35,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:00:35,471 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.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[11276,11289] [2020-12-22 09:00:35,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:00:35,609 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:00:35,740 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.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[11276,11289] [2020-12-22 09:00:35,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:00:35,821 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:00:35,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35 WrapperNode [2020-12-22 09:00:35,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:00:35,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:00:35,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:00:35,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:00:35,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:35,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:35,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:00:35,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:00:35,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:00:35,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:00:35,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:35,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:35,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:35,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:36,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:36,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:36,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (1/1) ... [2020-12-22 09:00:36,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:00:36,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:00:36,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:00:36,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:00:36,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (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 09:00:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:00:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:00:36,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:00:36,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:00:37,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:00:37,460 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 09:00:37,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:00:37 BoogieIcfgContainer [2020-12-22 09:00:37,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:00:37,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:00:37,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:00:37,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:00:37,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:00:35" (1/3) ... [2020-12-22 09:00:37,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294af934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:00:37, skipping insertion in model container [2020-12-22 09:00:37,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:00:35" (2/3) ... [2020-12-22 09:00:37,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294af934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:00:37, skipping insertion in model container [2020-12-22 09:00:37,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:00:37" (3/3) ... [2020-12-22 09:00:37,482 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 09:00:37,494 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:00:37,500 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:00:37,528 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:00:37,557 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:00:37,557 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:00:37,557 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:00:37,557 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:00:37,557 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:00:37,558 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:00:37,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:00:37,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:00:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states. [2020-12-22 09:00:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 09:00:37,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:37,596 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:37,597 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:37,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash 96284054, now seen corresponding path program 1 times [2020-12-22 09:00:37,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:37,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875179452] [2020-12-22 09:00:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:38,291 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 09:00:38,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875179452] [2020-12-22 09:00:38,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:38,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:00:38,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465798437] [2020-12-22 09:00:38,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:00:38,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:38,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:00:38,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:00:38,318 INFO L87 Difference]: Start difference. First operand 231 states. Second operand 3 states. [2020-12-22 09:00:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:38,479 INFO L93 Difference]: Finished difference Result 446 states and 748 transitions. [2020-12-22 09:00:38,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:00:38,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2020-12-22 09:00:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:38,499 INFO L225 Difference]: With dead ends: 446 [2020-12-22 09:00:38,500 INFO L226 Difference]: Without dead ends: 346 [2020-12-22 09:00:38,504 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 09:00:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-22 09:00:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 344. [2020-12-22 09:00:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-12-22 09:00:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 495 transitions. [2020-12-22 09:00:38,595 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 495 transitions. Word has length 124 [2020-12-22 09:00:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:38,596 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 495 transitions. [2020-12-22 09:00:38,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:00:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 495 transitions. [2020-12-22 09:00:38,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 09:00:38,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:38,600 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:38,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:00:38,600 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1563387348, now seen corresponding path program 1 times [2020-12-22 09:00:38,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:38,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396069633] [2020-12-22 09:00:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:38,959 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 09:00:38,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396069633] [2020-12-22 09:00:38,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:38,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:38,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024246498] [2020-12-22 09:00:38,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:38,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:38,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:38,966 INFO L87 Difference]: Start difference. First operand 344 states and 495 transitions. Second operand 5 states. [2020-12-22 09:00:39,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:39,224 INFO L93 Difference]: Finished difference Result 593 states and 887 transitions. [2020-12-22 09:00:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:39,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2020-12-22 09:00:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:39,228 INFO L225 Difference]: With dead ends: 593 [2020-12-22 09:00:39,228 INFO L226 Difference]: Without dead ends: 344 [2020-12-22 09:00:39,231 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 09:00:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-12-22 09:00:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2020-12-22 09:00:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-12-22 09:00:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 492 transitions. [2020-12-22 09:00:39,260 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 492 transitions. Word has length 126 [2020-12-22 09:00:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:39,261 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 492 transitions. [2020-12-22 09:00:39,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 492 transitions. [2020-12-22 09:00:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:00:39,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:39,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:39,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:00:39,265 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1653467386, now seen corresponding path program 1 times [2020-12-22 09:00:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:39,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486455512] [2020-12-22 09:00:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:39,464 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 09:00:39,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486455512] [2020-12-22 09:00:39,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:39,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266375290] [2020-12-22 09:00:39,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:39,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:39,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:39,471 INFO L87 Difference]: Start difference. First operand 344 states and 492 transitions. Second operand 5 states. [2020-12-22 09:00:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:39,773 INFO L93 Difference]: Finished difference Result 601 states and 891 transitions. [2020-12-22 09:00:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:39,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-12-22 09:00:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:39,780 INFO L225 Difference]: With dead ends: 601 [2020-12-22 09:00:39,780 INFO L226 Difference]: Without dead ends: 344 [2020-12-22 09:00:39,783 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 09:00:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-12-22 09:00:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2020-12-22 09:00:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-12-22 09:00:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 489 transitions. [2020-12-22 09:00:39,826 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 489 transitions. Word has length 127 [2020-12-22 09:00:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:39,830 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 489 transitions. [2020-12-22 09:00:39,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 489 transitions. [2020-12-22 09:00:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 09:00:39,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:39,843 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:39,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:00:39,844 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:39,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1375492460, now seen corresponding path program 1 times [2020-12-22 09:00:39,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:39,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753113861] [2020-12-22 09:00:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:40,079 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 09:00:40,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753113861] [2020-12-22 09:00:40,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:40,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:40,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878979521] [2020-12-22 09:00:40,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:00:40,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:40,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:00:40,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:00:40,087 INFO L87 Difference]: Start difference. First operand 344 states and 489 transitions. Second operand 6 states. [2020-12-22 09:00:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:40,497 INFO L93 Difference]: Finished difference Result 852 states and 1272 transitions. [2020-12-22 09:00:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:40,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-12-22 09:00:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:40,505 INFO L225 Difference]: With dead ends: 852 [2020-12-22 09:00:40,505 INFO L226 Difference]: Without dead ends: 575 [2020-12-22 09:00:40,508 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 09:00:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-12-22 09:00:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 573. [2020-12-22 09:00:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 573 states. [2020-12-22 09:00:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 847 transitions. [2020-12-22 09:00:40,554 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 847 transitions. Word has length 128 [2020-12-22 09:00:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:40,554 INFO L481 AbstractCegarLoop]: Abstraction has 573 states and 847 transitions. [2020-12-22 09:00:40,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:00:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 847 transitions. [2020-12-22 09:00:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 09:00:40,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:40,558 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:40,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:00:40,558 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1287483718, now seen corresponding path program 1 times [2020-12-22 09:00:40,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:40,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401168763] [2020-12-22 09:00:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:40,783 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 09:00:40,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401168763] [2020-12-22 09:00:40,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:40,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:40,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510751343] [2020-12-22 09:00:40,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:00:40,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:40,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:00:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:00:40,789 INFO L87 Difference]: Start difference. First operand 573 states and 847 transitions. Second operand 6 states. [2020-12-22 09:00:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:41,298 INFO L93 Difference]: Finished difference Result 1451 states and 2212 transitions. [2020-12-22 09:00:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:41,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2020-12-22 09:00:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:41,306 INFO L225 Difference]: With dead ends: 1451 [2020-12-22 09:00:41,306 INFO L226 Difference]: Without dead ends: 961 [2020-12-22 09:00:41,308 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 09:00:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2020-12-22 09:00:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 959. [2020-12-22 09:00:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-12-22 09:00:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1446 transitions. [2020-12-22 09:00:41,394 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1446 transitions. Word has length 129 [2020-12-22 09:00:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:41,394 INFO L481 AbstractCegarLoop]: Abstraction has 959 states and 1446 transitions. [2020-12-22 09:00:41,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:00:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1446 transitions. [2020-12-22 09:00:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 09:00:41,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:41,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:41,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:00:41,397 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash -937280724, now seen corresponding path program 1 times [2020-12-22 09:00:41,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:41,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129530565] [2020-12-22 09:00:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:41,617 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 09:00:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129530565] [2020-12-22 09:00:41,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:41,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:41,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472452177] [2020-12-22 09:00:41,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:00:41,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:41,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:00:41,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:00:41,622 INFO L87 Difference]: Start difference. First operand 959 states and 1446 transitions. Second operand 6 states. [2020-12-22 09:00:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:42,072 INFO L93 Difference]: Finished difference Result 2629 states and 4039 transitions. [2020-12-22 09:00:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:42,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2020-12-22 09:00:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:42,084 INFO L225 Difference]: With dead ends: 2629 [2020-12-22 09:00:42,084 INFO L226 Difference]: Without dead ends: 1749 [2020-12-22 09:00:42,086 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 09:00:42,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2020-12-22 09:00:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1747. [2020-12-22 09:00:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1747 states. [2020-12-22 09:00:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2665 transitions. [2020-12-22 09:00:42,245 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2665 transitions. Word has length 130 [2020-12-22 09:00:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:42,245 INFO L481 AbstractCegarLoop]: Abstraction has 1747 states and 2665 transitions. [2020-12-22 09:00:42,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:00:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2665 transitions. [2020-12-22 09:00:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 09:00:42,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:42,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:42,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:00:42,249 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:42,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:42,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1054057838, now seen corresponding path program 1 times [2020-12-22 09:00:42,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:42,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487259905] [2020-12-22 09:00:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:42,440 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 09:00:42,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487259905] [2020-12-22 09:00:42,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:42,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:00:42,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533921027] [2020-12-22 09:00:42,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:00:42,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:00:42,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:00:42,444 INFO L87 Difference]: Start difference. First operand 1747 states and 2665 transitions. Second operand 6 states. [2020-12-22 09:00:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:43,000 INFO L93 Difference]: Finished difference Result 4773 states and 7349 transitions. [2020-12-22 09:00:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:43,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2020-12-22 09:00:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:43,021 INFO L225 Difference]: With dead ends: 4773 [2020-12-22 09:00:43,021 INFO L226 Difference]: Without dead ends: 3117 [2020-12-22 09:00:43,026 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 09:00:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2020-12-22 09:00:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 3115. [2020-12-22 09:00:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3115 states. [2020-12-22 09:00:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 4760 transitions. [2020-12-22 09:00:43,349 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 4760 transitions. Word has length 131 [2020-12-22 09:00:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:43,349 INFO L481 AbstractCegarLoop]: Abstraction has 3115 states and 4760 transitions. [2020-12-22 09:00:43,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:00:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 4760 transitions. [2020-12-22 09:00:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 09:00:43,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:43,353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:43,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:00:43,354 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:43,354 INFO L82 PathProgramCache]: Analyzing trace with hash -139208048, now seen corresponding path program 1 times [2020-12-22 09:00:43,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:43,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773138383] [2020-12-22 09:00:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:43,496 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 09:00:43,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773138383] [2020-12-22 09:00:43,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:43,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:43,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119390839] [2020-12-22 09:00:43,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:43,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:43,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:43,498 INFO L87 Difference]: Start difference. First operand 3115 states and 4760 transitions. Second operand 5 states. [2020-12-22 09:00:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:43,980 INFO L93 Difference]: Finished difference Result 6155 states and 9443 transitions. [2020-12-22 09:00:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:43,981 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-12-22 09:00:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:43,998 INFO L225 Difference]: With dead ends: 6155 [2020-12-22 09:00:43,998 INFO L226 Difference]: Without dead ends: 3115 [2020-12-22 09:00:44,003 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 09:00:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2020-12-22 09:00:44,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3115. [2020-12-22 09:00:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3115 states. [2020-12-22 09:00:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 4727 transitions. [2020-12-22 09:00:44,272 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 4727 transitions. Word has length 132 [2020-12-22 09:00:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:44,272 INFO L481 AbstractCegarLoop]: Abstraction has 3115 states and 4727 transitions. [2020-12-22 09:00:44,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 4727 transitions. [2020-12-22 09:00:44,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 09:00:44,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:44,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:44,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:00:44,281 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:44,282 INFO L82 PathProgramCache]: Analyzing trace with hash 386157790, now seen corresponding path program 1 times [2020-12-22 09:00:44,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:44,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092596499] [2020-12-22 09:00:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:44,432 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 09:00:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092596499] [2020-12-22 09:00:44,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:44,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:00:44,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656851405] [2020-12-22 09:00:44,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:00:44,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:00:44,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:00:44,437 INFO L87 Difference]: Start difference. First operand 3115 states and 4727 transitions. Second operand 5 states. [2020-12-22 09:00:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:44,950 INFO L93 Difference]: Finished difference Result 6159 states and 9382 transitions. [2020-12-22 09:00:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:00:44,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-12-22 09:00:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:44,968 INFO L225 Difference]: With dead ends: 6159 [2020-12-22 09:00:44,968 INFO L226 Difference]: Without dead ends: 3115 [2020-12-22 09:00:44,974 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 09:00:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2020-12-22 09:00:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 3115. [2020-12-22 09:00:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3115 states. [2020-12-22 09:00:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 4694 transitions. [2020-12-22 09:00:45,326 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 4694 transitions. Word has length 133 [2020-12-22 09:00:45,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:45,327 INFO L481 AbstractCegarLoop]: Abstraction has 3115 states and 4694 transitions. [2020-12-22 09:00:45,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:00:45,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 4694 transitions. [2020-12-22 09:00:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:00:45,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:45,331 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:45,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:00:45,332 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:45,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:45,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1981300572, now seen corresponding path program 1 times [2020-12-22 09:00:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:45,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12664128] [2020-12-22 09:00:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:45,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:45,643 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 09:00:45,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12664128] [2020-12-22 09:00:45,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:45,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:00:45,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114427096] [2020-12-22 09:00:45,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:00:45,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:45,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:00:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:00:45,646 INFO L87 Difference]: Start difference. First operand 3115 states and 4694 transitions. Second operand 10 states. [2020-12-22 09:00:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:48,389 INFO L93 Difference]: Finished difference Result 26465 states and 40231 transitions. [2020-12-22 09:00:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:00:48,393 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-12-22 09:00:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:48,488 INFO L225 Difference]: With dead ends: 26465 [2020-12-22 09:00:48,488 INFO L226 Difference]: Without dead ends: 23743 [2020-12-22 09:00:48,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:00:48,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23743 states. [2020-12-22 09:00:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23743 to 4502. [2020-12-22 09:00:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4502 states. [2020-12-22 09:00:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 6814 transitions. [2020-12-22 09:00:49,426 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 6814 transitions. Word has length 134 [2020-12-22 09:00:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:49,427 INFO L481 AbstractCegarLoop]: Abstraction has 4502 states and 6814 transitions. [2020-12-22 09:00:49,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:00:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 6814 transitions. [2020-12-22 09:00:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:00:49,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:49,430 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:49,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:00:49,431 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash -35796984, now seen corresponding path program 1 times [2020-12-22 09:00:49,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:49,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433255756] [2020-12-22 09:00:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:49,735 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 09:00:49,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433255756] [2020-12-22 09:00:49,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:49,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:00:49,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865431016] [2020-12-22 09:00:49,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:00:49,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:49,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:00:49,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:00:49,738 INFO L87 Difference]: Start difference. First operand 4502 states and 6814 transitions. Second operand 10 states. [2020-12-22 09:00:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:53,191 INFO L93 Difference]: Finished difference Result 27605 states and 41983 transitions. [2020-12-22 09:00:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:00:53,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-12-22 09:00:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:53,250 INFO L225 Difference]: With dead ends: 27605 [2020-12-22 09:00:53,250 INFO L226 Difference]: Without dead ends: 24883 [2020-12-22 09:00:53,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:00:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24883 states. [2020-12-22 09:00:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24883 to 7485. [2020-12-22 09:00:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7485 states. [2020-12-22 09:00:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7485 states to 7485 states and 11374 transitions. [2020-12-22 09:00:54,616 INFO L78 Accepts]: Start accepts. Automaton has 7485 states and 11374 transitions. Word has length 134 [2020-12-22 09:00:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:00:54,617 INFO L481 AbstractCegarLoop]: Abstraction has 7485 states and 11374 transitions. [2020-12-22 09:00:54,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:00:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 7485 states and 11374 transitions. [2020-12-22 09:00:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:00:54,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:00:54,623 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:00:54,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:00:54,623 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:00:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:00:54,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1520043662, now seen corresponding path program 1 times [2020-12-22 09:00:54,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:00:54,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445826634] [2020-12-22 09:00:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:00:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:00:54,937 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 09:00:54,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445826634] [2020-12-22 09:00:54,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:00:54,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:00:54,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281264894] [2020-12-22 09:00:54,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:00:54,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:00:54,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:00:54,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:00:54,940 INFO L87 Difference]: Start difference. First operand 7485 states and 11374 transitions. Second operand 10 states. [2020-12-22 09:00:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:00:58,795 INFO L93 Difference]: Finished difference Result 28929 states and 44005 transitions. [2020-12-22 09:00:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:00:58,796 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-12-22 09:00:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:00:58,851 INFO L225 Difference]: With dead ends: 28929 [2020-12-22 09:00:58,852 INFO L226 Difference]: Without dead ends: 26207 [2020-12-22 09:00:58,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:00:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26207 states. [2020-12-22 09:01:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26207 to 8935. [2020-12-22 09:01:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8935 states. [2020-12-22 09:01:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 13590 transitions. [2020-12-22 09:01:00,326 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 13590 transitions. Word has length 134 [2020-12-22 09:01:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:00,327 INFO L481 AbstractCegarLoop]: Abstraction has 8935 states and 13590 transitions. [2020-12-22 09:01:00,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:01:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 13590 transitions. [2020-12-22 09:01:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:01:00,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:00,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:00,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:01:00,333 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:00,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1042374816, now seen corresponding path program 1 times [2020-12-22 09:01:00,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:00,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708145788] [2020-12-22 09:01:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:00,644 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 09:01:00,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708145788] [2020-12-22 09:01:00,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:00,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:01:00,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58699688] [2020-12-22 09:01:00,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:01:00,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:00,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:01:00,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:01:00,648 INFO L87 Difference]: Start difference. First operand 8935 states and 13590 transitions. Second operand 10 states. [2020-12-22 09:01:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:05,101 INFO L93 Difference]: Finished difference Result 29883 states and 45467 transitions. [2020-12-22 09:01:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:01:05,102 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-12-22 09:01:05,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:05,164 INFO L225 Difference]: With dead ends: 29883 [2020-12-22 09:01:05,164 INFO L226 Difference]: Without dead ends: 27161 [2020-12-22 09:01:05,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:01:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27161 states. [2020-12-22 09:01:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27161 to 10335. [2020-12-22 09:01:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10335 states. [2020-12-22 09:01:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 15726 transitions. [2020-12-22 09:01:06,893 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 15726 transitions. Word has length 134 [2020-12-22 09:01:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:06,893 INFO L481 AbstractCegarLoop]: Abstraction has 10335 states and 15726 transitions. [2020-12-22 09:01:06,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:01:06,894 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 15726 transitions. [2020-12-22 09:01:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:01:06,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:06,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:06,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:01:06,899 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash -405814938, now seen corresponding path program 1 times [2020-12-22 09:01:06,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:06,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375735765] [2020-12-22 09:01:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:07,130 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 09:01:07,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375735765] [2020-12-22 09:01:07,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:07,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:01:07,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410421696] [2020-12-22 09:01:07,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:01:07,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:07,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:01:07,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:01:07,132 INFO L87 Difference]: Start difference. First operand 10335 states and 15726 transitions. Second operand 10 states. [2020-12-22 09:01:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:12,234 INFO L93 Difference]: Finished difference Result 31115 states and 47355 transitions. [2020-12-22 09:01:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:01:12,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-12-22 09:01:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:12,271 INFO L225 Difference]: With dead ends: 31115 [2020-12-22 09:01:12,272 INFO L226 Difference]: Without dead ends: 28393 [2020-12-22 09:01:12,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:01:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28393 states. [2020-12-22 09:01:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28393 to 11727. [2020-12-22 09:01:14,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11727 states. [2020-12-22 09:01:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11727 states to 11727 states and 17854 transitions. [2020-12-22 09:01:14,663 INFO L78 Accepts]: Start accepts. Automaton has 11727 states and 17854 transitions. Word has length 134 [2020-12-22 09:01:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:14,663 INFO L481 AbstractCegarLoop]: Abstraction has 11727 states and 17854 transitions. [2020-12-22 09:01:14,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:01:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11727 states and 17854 transitions. [2020-12-22 09:01:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:01:14,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:14,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:14,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:01:14,668 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:14,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:14,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1745679121, now seen corresponding path program 1 times [2020-12-22 09:01:14,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:14,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123219005] [2020-12-22 09:01:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:14,759 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 09:01:14,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123219005] [2020-12-22 09:01:14,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:14,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:14,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748263095] [2020-12-22 09:01:14,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:14,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:14,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:14,762 INFO L87 Difference]: Start difference. First operand 11727 states and 17854 transitions. Second operand 3 states. [2020-12-22 09:01:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:18,058 INFO L93 Difference]: Finished difference Result 31155 states and 47536 transitions. [2020-12-22 09:01:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:18,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:01:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:18,083 INFO L225 Difference]: With dead ends: 31155 [2020-12-22 09:01:18,083 INFO L226 Difference]: Without dead ends: 20081 [2020-12-22 09:01:18,107 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 09:01:18,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20081 states. [2020-12-22 09:01:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20081 to 20079. [2020-12-22 09:01:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20079 states. [2020-12-22 09:01:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20079 states to 20079 states and 30398 transitions. [2020-12-22 09:01:21,296 INFO L78 Accepts]: Start accepts. Automaton has 20079 states and 30398 transitions. Word has length 134 [2020-12-22 09:01:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:21,296 INFO L481 AbstractCegarLoop]: Abstraction has 20079 states and 30398 transitions. [2020-12-22 09:01:21,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 20079 states and 30398 transitions. [2020-12-22 09:01:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:01:21,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:21,302 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:21,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:01:21,302 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1465375602, now seen corresponding path program 1 times [2020-12-22 09:01:21,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:21,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619363021] [2020-12-22 09:01:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:21,379 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 09:01:21,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619363021] [2020-12-22 09:01:21,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:21,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:01:21,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534154032] [2020-12-22 09:01:21,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:01:21,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:21,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:01:21,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:01:21,382 INFO L87 Difference]: Start difference. First operand 20079 states and 30398 transitions. Second operand 3 states. [2020-12-22 09:01:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:27,899 INFO L93 Difference]: Finished difference Result 57523 states and 86944 transitions. [2020-12-22 09:01:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:01:27,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2020-12-22 09:01:27,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:27,942 INFO L225 Difference]: With dead ends: 57523 [2020-12-22 09:01:27,942 INFO L226 Difference]: Without dead ends: 38097 [2020-12-22 09:01:27,962 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 09:01:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38097 states. [2020-12-22 09:01:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38097 to 37647. [2020-12-22 09:01:34,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37647 states. [2020-12-22 09:01:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37647 states to 37647 states and 56398 transitions. [2020-12-22 09:01:34,763 INFO L78 Accepts]: Start accepts. Automaton has 37647 states and 56398 transitions. Word has length 134 [2020-12-22 09:01:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:01:34,764 INFO L481 AbstractCegarLoop]: Abstraction has 37647 states and 56398 transitions. [2020-12-22 09:01:34,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:01:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 37647 states and 56398 transitions. [2020-12-22 09:01:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:01:34,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:01:34,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:01:34,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:01:34,769 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:01:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:01:34,770 INFO L82 PathProgramCache]: Analyzing trace with hash -674307358, now seen corresponding path program 1 times [2020-12-22 09:01:34,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:01:34,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65877926] [2020-12-22 09:01:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:01:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:01:34,999 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 09:01:34,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65877926] [2020-12-22 09:01:34,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:01:34,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:01:34,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883954236] [2020-12-22 09:01:35,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:01:35,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:01:35,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:01:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:01:35,001 INFO L87 Difference]: Start difference. First operand 37647 states and 56398 transitions. Second operand 10 states. [2020-12-22 09:01:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:01:53,512 INFO L93 Difference]: Finished difference Result 98987 states and 148535 transitions. [2020-12-22 09:01:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:01:53,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-12-22 09:01:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:01:53,621 INFO L225 Difference]: With dead ends: 98987 [2020-12-22 09:01:53,621 INFO L226 Difference]: Without dead ends: 91129 [2020-12-22 09:01:53,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:01:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91129 states. [2020-12-22 09:02:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91129 to 42999. [2020-12-22 09:02:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42999 states. [2020-12-22 09:02:02,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42999 states to 42999 states and 64414 transitions. [2020-12-22 09:02:02,413 INFO L78 Accepts]: Start accepts. Automaton has 42999 states and 64414 transitions. Word has length 134 [2020-12-22 09:02:02,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:02,414 INFO L481 AbstractCegarLoop]: Abstraction has 42999 states and 64414 transitions. [2020-12-22 09:02:02,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:02:02,414 INFO L276 IsEmpty]: Start isEmpty. Operand 42999 states and 64414 transitions. [2020-12-22 09:02:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:02:02,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:02,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:02:02,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:02:02,420 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:02,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1211224756, now seen corresponding path program 1 times [2020-12-22 09:02:02,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:02,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136417811] [2020-12-22 09:02:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:02,650 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 09:02:02,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136417811] [2020-12-22 09:02:02,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:02,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:02:02,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3056102] [2020-12-22 09:02:02,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:02:02,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:02,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:02:02,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:02:02,652 INFO L87 Difference]: Start difference. First operand 42999 states and 64414 transitions. Second operand 10 states. [2020-12-22 09:02:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:02:24,546 INFO L93 Difference]: Finished difference Result 104631 states and 156991 transitions. [2020-12-22 09:02:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:02:24,547 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-12-22 09:02:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:02:24,660 INFO L225 Difference]: With dead ends: 104631 [2020-12-22 09:02:24,661 INFO L226 Difference]: Without dead ends: 96773 [2020-12-22 09:02:24,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:02:24,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96773 states. [2020-12-22 09:02:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96773 to 48343. [2020-12-22 09:02:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48343 states. [2020-12-22 09:02:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48343 states to 48343 states and 72422 transitions. [2020-12-22 09:02:35,116 INFO L78 Accepts]: Start accepts. Automaton has 48343 states and 72422 transitions. Word has length 134 [2020-12-22 09:02:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:02:35,116 INFO L481 AbstractCegarLoop]: Abstraction has 48343 states and 72422 transitions. [2020-12-22 09:02:35,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:02:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 48343 states and 72422 transitions. [2020-12-22 09:02:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 09:02:35,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:02:35,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:02:35,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:02:35,122 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:02:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:02:35,123 INFO L82 PathProgramCache]: Analyzing trace with hash 54102074, now seen corresponding path program 1 times [2020-12-22 09:02:35,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:02:35,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693487064] [2020-12-22 09:02:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:02:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:02:35,376 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 09:02:35,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693487064] [2020-12-22 09:02:35,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:02:35,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:02:35,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292424226] [2020-12-22 09:02:35,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:02:35,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:02:35,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:02:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:02:35,379 INFO L87 Difference]: Start difference. First operand 48343 states and 72422 transitions. Second operand 10 states. [2020-12-22 09:03:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:00,808 INFO L93 Difference]: Finished difference Result 110981 states and 166527 transitions. [2020-12-22 09:03:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:03:00,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 134 [2020-12-22 09:03:00,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:00,938 INFO L225 Difference]: With dead ends: 110981 [2020-12-22 09:03:00,939 INFO L226 Difference]: Without dead ends: 103123 [2020-12-22 09:03:00,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:03:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103123 states. [2020-12-22 09:03:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103123 to 53770. [2020-12-22 09:03:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53770 states. [2020-12-22 09:03:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53770 states to 53770 states and 80558 transitions. [2020-12-22 09:03:13,412 INFO L78 Accepts]: Start accepts. Automaton has 53770 states and 80558 transitions. Word has length 134 [2020-12-22 09:03:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:13,413 INFO L481 AbstractCegarLoop]: Abstraction has 53770 states and 80558 transitions. [2020-12-22 09:03:13,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:03:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 53770 states and 80558 transitions. [2020-12-22 09:03:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:03:13,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:13,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:13,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:03:13,420 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:13,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1720431211, now seen corresponding path program 1 times [2020-12-22 09:03:13,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:13,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005996303] [2020-12-22 09:03:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:13,537 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 09:03:13,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005996303] [2020-12-22 09:03:13,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:13,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:03:13,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792527425] [2020-12-22 09:03:13,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:03:13,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:13,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:03:13,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:03:13,539 INFO L87 Difference]: Start difference. First operand 53770 states and 80558 transitions. Second operand 5 states. [2020-12-22 09:03:35,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:03:35,691 INFO L93 Difference]: Finished difference Result 92548 states and 138487 transitions. [2020-12-22 09:03:35,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:03:35,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 09:03:35,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:03:35,783 INFO L225 Difference]: With dead ends: 92548 [2020-12-22 09:03:35,783 INFO L226 Difference]: Without dead ends: 92546 [2020-12-22 09:03:35,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:03:35,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92546 states. [2020-12-22 09:03:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92546 to 54058. [2020-12-22 09:03:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54058 states. [2020-12-22 09:03:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54058 states to 54058 states and 80686 transitions. [2020-12-22 09:03:49,341 INFO L78 Accepts]: Start accepts. Automaton has 54058 states and 80686 transitions. Word has length 135 [2020-12-22 09:03:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:03:49,341 INFO L481 AbstractCegarLoop]: Abstraction has 54058 states and 80686 transitions. [2020-12-22 09:03:49,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:03:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 54058 states and 80686 transitions. [2020-12-22 09:03:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:03:49,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:03:49,346 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:03:49,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:03:49,347 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:03:49,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:03:49,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1548122415, now seen corresponding path program 1 times [2020-12-22 09:03:49,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:03:49,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439151633] [2020-12-22 09:03:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:03:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:03:49,624 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 09:03:49,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439151633] [2020-12-22 09:03:49,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:03:49,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 09:03:49,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398467017] [2020-12-22 09:03:49,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:03:49,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:03:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:03:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:03:49,626 INFO L87 Difference]: Start difference. First operand 54058 states and 80686 transitions. Second operand 10 states. [2020-12-22 09:04:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:04:19,404 INFO L93 Difference]: Finished difference Result 162885 states and 242568 transitions. [2020-12-22 09:04:19,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 09:04:19,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-12-22 09:04:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:04:19,557 INFO L225 Difference]: With dead ends: 162885 [2020-12-22 09:04:19,557 INFO L226 Difference]: Without dead ends: 109119 [2020-12-22 09:04:19,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:04:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109119 states. [2020-12-22 09:04:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109119 to 54058. [2020-12-22 09:04:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54058 states. [2020-12-22 09:04:34,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54058 states to 54058 states and 80680 transitions. [2020-12-22 09:04:34,757 INFO L78 Accepts]: Start accepts. Automaton has 54058 states and 80680 transitions. Word has length 135 [2020-12-22 09:04:34,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:04:34,757 INFO L481 AbstractCegarLoop]: Abstraction has 54058 states and 80680 transitions. [2020-12-22 09:04:34,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:04:34,757 INFO L276 IsEmpty]: Start isEmpty. Operand 54058 states and 80680 transitions. [2020-12-22 09:04:34,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:04:34,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:04:34,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:34,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:04:34,763 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:04:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:04:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash -260842722, now seen corresponding path program 1 times [2020-12-22 09:04:34,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:04:34,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966319212] [2020-12-22 09:04:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:04:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:04:35,025 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 09:04:35,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966319212] [2020-12-22 09:04:35,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:04:35,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 09:04:35,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656442544] [2020-12-22 09:04:35,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:04:35,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:04:35,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:04:35,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:04:35,028 INFO L87 Difference]: Start difference. First operand 54058 states and 80680 transitions. Second operand 10 states.