/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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:48:14,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:48:14,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:48:14,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:48:14,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:48:14,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:48:14,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:48:14,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:48:14,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:48:14,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:48:14,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:48:14,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:48:14,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:48:14,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:48:14,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:48:14,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:48:14,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:48:14,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:48:14,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:48:14,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:48:14,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:48:14,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:48:14,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:48:14,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:48:14,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:48:14,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:48:14,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:48:14,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:48:14,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:48:14,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:48:14,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:48:14,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:48:14,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:48:14,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:48:14,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:48:14,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:48:14,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:48:14,594 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:48:14,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:48:14,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:48:14,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:48:14,600 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:48:14,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:48:14,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:48:14,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:48:14,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:48:14,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:48:14,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:48:14,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:48:14,602 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:48:14,603 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:48:14,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:48:14,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:48:14,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:48:14,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:14,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:48:14,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:48:14,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:48:14,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:48:14,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:48:14,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:48:14,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:48:14,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:48:14,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:48:15,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:48:15,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:48:15,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:48:15,016 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:48:15,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:48:15,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b4340ae/d79b56a1bcad42dca1d1ec4497b586a1/FLAGff3bd78f3 [2020-12-22 09:48:16,295 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:48:16,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:48:16,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b4340ae/d79b56a1bcad42dca1d1ec4497b586a1/FLAGff3bd78f3 [2020-12-22 09:48:16,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14b4340ae/d79b56a1bcad42dca1d1ec4497b586a1 [2020-12-22 09:48:16,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:48:16,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:48:16,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:16,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:48:16,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:48:16,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:16" (1/1) ... [2020-12-22 09:48:16,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@497bf9c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:16, skipping insertion in model container [2020-12-22 09:48:16,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:48:16" (1/1) ... [2020-12-22 09:48:16,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:48:16,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:48:17,226 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c[8784,8797] [2020-12-22 09:48:17,264 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c[10878,10891] [2020-12-22 09:48:18,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:18,479 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:48:18,540 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c[8784,8797] [2020-12-22 09:48:18,545 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/combinations/pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c[10878,10891] [2020-12-22 09:48:19,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:48:19,345 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:48:19,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19 WrapperNode [2020-12-22 09:48:19,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:48:19,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:19,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:48:19,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:48:19,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:19,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:19,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:48:19,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:48:19,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:48:19,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:48:19,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:19,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:20,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:20,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:20,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:20,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:20,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... [2020-12-22 09:48:20,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:48:20,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:48:20,480 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:48:20,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:48:20,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:48:20,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:48:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:48:20,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:48:20,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:48:26,248 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:48:26,249 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 09:48:26,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:26 BoogieIcfgContainer [2020-12-22 09:48:26,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:48:26,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:48:26,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:48:26,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:48:26,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:48:16" (1/3) ... [2020-12-22 09:48:26,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5583ddf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:26, skipping insertion in model container [2020-12-22 09:48:26,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:48:19" (2/3) ... [2020-12-22 09:48:26,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5583ddf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:48:26, skipping insertion in model container [2020-12-22 09:48:26,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:48:26" (3/3) ... [2020-12-22 09:48:26,269 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.UNBOUNDED.pals+Problem12_label03.c [2020-12-22 09:48:26,276 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:48:26,284 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:48:26,305 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:48:26,343 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:48:26,343 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:48:26,343 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:48:26,344 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:48:26,344 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:48:26,344 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:48:26,344 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:48:26,344 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:48:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states. [2020-12-22 09:48:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 09:48:26,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:26,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:26,394 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:26,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1009099931, now seen corresponding path program 1 times [2020-12-22 09:48:26,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:26,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206722325] [2020-12-22 09:48:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:26,784 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 09:48:26,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206722325] [2020-12-22 09:48:26,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:26,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:48:26,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286507885] [2020-12-22 09:48:26,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:26,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:26,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:26,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:26,818 INFO L87 Difference]: Start difference. First operand 894 states. Second operand 3 states. [2020-12-22 09:48:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:33,051 INFO L93 Difference]: Finished difference Result 2512 states and 4836 transitions. [2020-12-22 09:48:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:33,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-22 09:48:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:33,108 INFO L225 Difference]: With dead ends: 2512 [2020-12-22 09:48:33,108 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:48:33,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:48:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:48:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:48:33,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2589 transitions. [2020-12-22 09:48:33,295 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2589 transitions. Word has length 20 [2020-12-22 09:48:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:33,295 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2589 transitions. [2020-12-22 09:48:33,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2589 transitions. [2020-12-22 09:48:33,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 09:48:33,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:33,300 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] [2020-12-22 09:48:33,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:48:33,300 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:33,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:33,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1951091139, now seen corresponding path program 1 times [2020-12-22 09:48:33,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:33,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096895160] [2020-12-22 09:48:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:33,481 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 09:48:33,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096895160] [2020-12-22 09:48:33,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:33,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:33,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793812266] [2020-12-22 09:48:33,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:33,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:33,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:33,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:33,490 INFO L87 Difference]: Start difference. First operand 1579 states and 2589 transitions. Second operand 5 states. [2020-12-22 09:48:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:33,591 INFO L93 Difference]: Finished difference Result 1628 states and 2664 transitions. [2020-12-22 09:48:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:48:33,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-22 09:48:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:33,602 INFO L225 Difference]: With dead ends: 1628 [2020-12-22 09:48:33,602 INFO L226 Difference]: Without dead ends: 1579 [2020-12-22 09:48:33,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:48:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-22 09:48:33,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1579. [2020-12-22 09:48:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1579 states. [2020-12-22 09:48:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 2566 transitions. [2020-12-22 09:48:33,658 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 2566 transitions. Word has length 30 [2020-12-22 09:48:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:33,658 INFO L481 AbstractCegarLoop]: Abstraction has 1579 states and 2566 transitions. [2020-12-22 09:48:33,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 2566 transitions. [2020-12-22 09:48:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 09:48:33,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:33,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:33,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:48:33,662 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash 568524862, now seen corresponding path program 1 times [2020-12-22 09:48:33,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:33,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991533784] [2020-12-22 09:48:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:33,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991533784] [2020-12-22 09:48:33,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:33,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:33,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485948929] [2020-12-22 09:48:33,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:33,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:33,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:33,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:33,890 INFO L87 Difference]: Start difference. First operand 1579 states and 2566 transitions. Second operand 6 states. [2020-12-22 09:48:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:34,124 INFO L93 Difference]: Finished difference Result 1939 states and 3134 transitions. [2020-12-22 09:48:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:48:34,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-12-22 09:48:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:34,139 INFO L225 Difference]: With dead ends: 1939 [2020-12-22 09:48:34,140 INFO L226 Difference]: Without dead ends: 1894 [2020-12-22 09:48:34,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:48:34,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2020-12-22 09:48:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1622. [2020-12-22 09:48:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1622 states. [2020-12-22 09:48:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2634 transitions. [2020-12-22 09:48:34,211 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2634 transitions. Word has length 52 [2020-12-22 09:48:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:34,213 INFO L481 AbstractCegarLoop]: Abstraction has 1622 states and 2634 transitions. [2020-12-22 09:48:34,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2634 transitions. [2020-12-22 09:48:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:34,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:34,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:34,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:48:34,223 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:34,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:34,225 INFO L82 PathProgramCache]: Analyzing trace with hash -524152242, now seen corresponding path program 1 times [2020-12-22 09:48:34,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:34,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189114140] [2020-12-22 09:48:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:34,344 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 09:48:34,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189114140] [2020-12-22 09:48:34,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:34,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:34,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49264609] [2020-12-22 09:48:34,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:34,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:34,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:34,347 INFO L87 Difference]: Start difference. First operand 1622 states and 2634 transitions. Second operand 3 states. [2020-12-22 09:48:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:34,411 INFO L93 Difference]: Finished difference Result 1787 states and 2893 transitions. [2020-12-22 09:48:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:34,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:34,423 INFO L225 Difference]: With dead ends: 1787 [2020-12-22 09:48:34,423 INFO L226 Difference]: Without dead ends: 1699 [2020-12-22 09:48:34,424 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 09:48:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-12-22 09:48:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1695. [2020-12-22 09:48:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:48:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2746 transitions. [2020-12-22 09:48:34,481 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2746 transitions. Word has length 54 [2020-12-22 09:48:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:34,482 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 2746 transitions. [2020-12-22 09:48:34,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2746 transitions. [2020-12-22 09:48:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:34,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:34,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:34,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:48:34,485 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -457658730, now seen corresponding path program 1 times [2020-12-22 09:48:34,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:34,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941488605] [2020-12-22 09:48:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:34,667 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 09:48:34,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941488605] [2020-12-22 09:48:34,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:34,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:34,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865304443] [2020-12-22 09:48:34,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:34,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:34,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:34,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:34,671 INFO L87 Difference]: Start difference. First operand 1695 states and 2746 transitions. Second operand 6 states. [2020-12-22 09:48:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:34,853 INFO L93 Difference]: Finished difference Result 1858 states and 2998 transitions. [2020-12-22 09:48:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:34,854 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-12-22 09:48:34,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:34,865 INFO L225 Difference]: With dead ends: 1858 [2020-12-22 09:48:34,865 INFO L226 Difference]: Without dead ends: 1697 [2020-12-22 09:48:34,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2020-12-22 09:48:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1695. [2020-12-22 09:48:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-12-22 09:48:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2744 transitions. [2020-12-22 09:48:34,922 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2744 transitions. Word has length 54 [2020-12-22 09:48:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:34,922 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 2744 transitions. [2020-12-22 09:48:34,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2744 transitions. [2020-12-22 09:48:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:34,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:34,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:34,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:48:34,926 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:34,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1331255346, now seen corresponding path program 1 times [2020-12-22 09:48:34,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:34,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173052762] [2020-12-22 09:48:34,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:35,035 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 09:48:35,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173052762] [2020-12-22 09:48:35,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:35,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:35,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616710880] [2020-12-22 09:48:35,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:35,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:35,040 INFO L87 Difference]: Start difference. First operand 1695 states and 2744 transitions. Second operand 3 states. [2020-12-22 09:48:35,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:35,154 INFO L93 Difference]: Finished difference Result 1993 states and 3202 transitions. [2020-12-22 09:48:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:35,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:35,168 INFO L225 Difference]: With dead ends: 1993 [2020-12-22 09:48:35,168 INFO L226 Difference]: Without dead ends: 1832 [2020-12-22 09:48:35,170 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 09:48:35,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2020-12-22 09:48:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1830. [2020-12-22 09:48:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1830 states. [2020-12-22 09:48:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 2948 transitions. [2020-12-22 09:48:35,239 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 2948 transitions. Word has length 54 [2020-12-22 09:48:35,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:35,240 INFO L481 AbstractCegarLoop]: Abstraction has 1830 states and 2948 transitions. [2020-12-22 09:48:35,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 2948 transitions. [2020-12-22 09:48:35,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:35,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:35,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:35,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:48:35,242 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:35,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:35,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1716204334, now seen corresponding path program 1 times [2020-12-22 09:48:35,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:35,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472804209] [2020-12-22 09:48:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:35,323 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 09:48:35,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472804209] [2020-12-22 09:48:35,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:35,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:35,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566434643] [2020-12-22 09:48:35,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:35,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:35,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:35,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:35,326 INFO L87 Difference]: Start difference. First operand 1830 states and 2948 transitions. Second operand 3 states. [2020-12-22 09:48:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:35,397 INFO L93 Difference]: Finished difference Result 2374 states and 3774 transitions. [2020-12-22 09:48:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:35,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:35,411 INFO L225 Difference]: With dead ends: 2374 [2020-12-22 09:48:35,411 INFO L226 Difference]: Without dead ends: 2078 [2020-12-22 09:48:35,413 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 09:48:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2020-12-22 09:48:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 2076. [2020-12-22 09:48:35,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2076 states. [2020-12-22 09:48:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3312 transitions. [2020-12-22 09:48:35,499 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3312 transitions. Word has length 54 [2020-12-22 09:48:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:35,500 INFO L481 AbstractCegarLoop]: Abstraction has 2076 states and 3312 transitions. [2020-12-22 09:48:35,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3312 transitions. [2020-12-22 09:48:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 09:48:35,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:35,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:35,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:48:35,502 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1442516622, now seen corresponding path program 1 times [2020-12-22 09:48:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:35,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326854296] [2020-12-22 09:48:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:35,584 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 09:48:35,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326854296] [2020-12-22 09:48:35,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:35,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:35,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946469331] [2020-12-22 09:48:35,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:35,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:35,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:35,588 INFO L87 Difference]: Start difference. First operand 2076 states and 3312 transitions. Second operand 3 states. [2020-12-22 09:48:35,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:35,686 INFO L93 Difference]: Finished difference Result 3064 states and 4786 transitions. [2020-12-22 09:48:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:35,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 09:48:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:35,702 INFO L225 Difference]: With dead ends: 3064 [2020-12-22 09:48:35,702 INFO L226 Difference]: Without dead ends: 2522 [2020-12-22 09:48:35,705 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 09:48:35,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2020-12-22 09:48:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2520. [2020-12-22 09:48:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2520 states. [2020-12-22 09:48:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3952 transitions. [2020-12-22 09:48:35,824 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3952 transitions. Word has length 54 [2020-12-22 09:48:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:35,825 INFO L481 AbstractCegarLoop]: Abstraction has 2520 states and 3952 transitions. [2020-12-22 09:48:35,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3952 transitions. [2020-12-22 09:48:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 09:48:35,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:35,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:35,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:48:35,827 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:35,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:35,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1717241860, now seen corresponding path program 1 times [2020-12-22 09:48:35,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:35,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652290220] [2020-12-22 09:48:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:35,969 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 09:48:35,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652290220] [2020-12-22 09:48:35,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:35,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:48:35,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790777975] [2020-12-22 09:48:35,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:48:35,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:35,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:48:35,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:48:35,974 INFO L87 Difference]: Start difference. First operand 2520 states and 3952 transitions. Second operand 5 states. [2020-12-22 09:48:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:36,202 INFO L93 Difference]: Finished difference Result 3274 states and 5037 transitions. [2020-12-22 09:48:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:48:36,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2020-12-22 09:48:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:36,222 INFO L225 Difference]: With dead ends: 3274 [2020-12-22 09:48:36,222 INFO L226 Difference]: Without dead ends: 3272 [2020-12-22 09:48:36,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:48:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2020-12-22 09:48:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2568. [2020-12-22 09:48:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-12-22 09:48:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3992 transitions. [2020-12-22 09:48:36,391 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3992 transitions. Word has length 55 [2020-12-22 09:48:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:36,392 INFO L481 AbstractCegarLoop]: Abstraction has 2568 states and 3992 transitions. [2020-12-22 09:48:36,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:48:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3992 transitions. [2020-12-22 09:48:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 09:48:36,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:36,393 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] [2020-12-22 09:48:36,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:48:36,394 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:36,394 INFO L82 PathProgramCache]: Analyzing trace with hash -754642547, now seen corresponding path program 1 times [2020-12-22 09:48:36,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:36,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250192178] [2020-12-22 09:48:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:36,474 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 09:48:36,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250192178] [2020-12-22 09:48:36,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:36,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:36,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45791832] [2020-12-22 09:48:36,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:36,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:36,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:36,478 INFO L87 Difference]: Start difference. First operand 2568 states and 3992 transitions. Second operand 3 states. [2020-12-22 09:48:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:36,635 INFO L93 Difference]: Finished difference Result 3631 states and 5550 transitions. [2020-12-22 09:48:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:36,636 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-12-22 09:48:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:36,655 INFO L225 Difference]: With dead ends: 3631 [2020-12-22 09:48:36,656 INFO L226 Difference]: Without dead ends: 3036 [2020-12-22 09:48:36,659 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 09:48:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2020-12-22 09:48:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3034. [2020-12-22 09:48:36,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 09:48:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4650 transitions. [2020-12-22 09:48:36,845 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4650 transitions. Word has length 56 [2020-12-22 09:48:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:36,846 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4650 transitions. [2020-12-22 09:48:36,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4650 transitions. [2020-12-22 09:48:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:36,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:36,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:36,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:48:36,849 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash 280942850, now seen corresponding path program 1 times [2020-12-22 09:48:36,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:36,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593261492] [2020-12-22 09:48:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 09:48:36,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593261492] [2020-12-22 09:48:36,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:36,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:36,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880669930] [2020-12-22 09:48:36,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:36,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:36,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:36,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:36,976 INFO L87 Difference]: Start difference. First operand 3034 states and 4650 transitions. Second operand 6 states. [2020-12-22 09:48:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:37,662 INFO L93 Difference]: Finished difference Result 9340 states and 13691 transitions. [2020-12-22 09:48:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:37,663 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:37,712 INFO L225 Difference]: With dead ends: 9340 [2020-12-22 09:48:37,713 INFO L226 Difference]: Without dead ends: 7842 [2020-12-22 09:48:37,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2020-12-22 09:48:38,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2020-12-22 09:48:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4530 states. [2020-12-22 09:48:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6778 transitions. [2020-12-22 09:48:38,022 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6778 transitions. Word has length 78 [2020-12-22 09:48:38,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:38,023 INFO L481 AbstractCegarLoop]: Abstraction has 4530 states and 6778 transitions. [2020-12-22 09:48:38,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6778 transitions. [2020-12-22 09:48:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:38,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:38,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:38,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:48:38,035 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:38,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1528450466, now seen corresponding path program 1 times [2020-12-22 09:48:38,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:38,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132760518] [2020-12-22 09:48:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:48:38,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132760518] [2020-12-22 09:48:38,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:38,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:38,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430568968] [2020-12-22 09:48:38,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:38,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:38,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:38,154 INFO L87 Difference]: Start difference. First operand 4530 states and 6778 transitions. Second operand 6 states. [2020-12-22 09:48:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:38,797 INFO L93 Difference]: Finished difference Result 10836 states and 15819 transitions. [2020-12-22 09:48:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:38,799 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:38,827 INFO L225 Difference]: With dead ends: 10836 [2020-12-22 09:48:38,827 INFO L226 Difference]: Without dead ends: 9338 [2020-12-22 09:48:38,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2020-12-22 09:48:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2020-12-22 09:48:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6778 states. [2020-12-22 09:48:39,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9950 transitions. [2020-12-22 09:48:39,359 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9950 transitions. Word has length 78 [2020-12-22 09:48:39,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:39,359 INFO L481 AbstractCegarLoop]: Abstraction has 6778 states and 9950 transitions. [2020-12-22 09:48:39,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9950 transitions. [2020-12-22 09:48:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:48:39,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:39,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:39,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:48:39,363 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:39,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1802138178, now seen corresponding path program 1 times [2020-12-22 09:48:39,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:39,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804984558] [2020-12-22 09:48:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:48:39,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804984558] [2020-12-22 09:48:39,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:39,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:39,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095410765] [2020-12-22 09:48:39,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:39,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:39,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:39,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:39,609 INFO L87 Difference]: Start difference. First operand 6778 states and 9950 transitions. Second operand 6 states. [2020-12-22 09:48:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:40,344 INFO L93 Difference]: Finished difference Result 12332 states and 17947 transitions. [2020-12-22 09:48:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:40,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 78 [2020-12-22 09:48:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:40,375 INFO L225 Difference]: With dead ends: 12332 [2020-12-22 09:48:40,376 INFO L226 Difference]: Without dead ends: 10834 [2020-12-22 09:48:40,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:40,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2020-12-22 09:48:40,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2020-12-22 09:48:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8274 states. [2020-12-22 09:48:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 12078 transitions. [2020-12-22 09:48:40,988 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 12078 transitions. Word has length 78 [2020-12-22 09:48:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:40,989 INFO L481 AbstractCegarLoop]: Abstraction has 8274 states and 12078 transitions. [2020-12-22 09:48:40,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 12078 transitions. [2020-12-22 09:48:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:48:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:40,992 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:40,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:48:40,993 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:40,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1946065318, now seen corresponding path program 1 times [2020-12-22 09:48:40,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:40,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191185286] [2020-12-22 09:48:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:41,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191185286] [2020-12-22 09:48:41,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:41,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:41,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890908444] [2020-12-22 09:48:41,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:41,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:41,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:41,069 INFO L87 Difference]: Start difference. First operand 8274 states and 12078 transitions. Second operand 3 states. [2020-12-22 09:48:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:41,421 INFO L93 Difference]: Finished difference Result 13055 states and 18950 transitions. [2020-12-22 09:48:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:41,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 80 [2020-12-22 09:48:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:41,436 INFO L225 Difference]: With dead ends: 13055 [2020-12-22 09:48:41,437 INFO L226 Difference]: Without dead ends: 6317 [2020-12-22 09:48:41,450 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 09:48:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2020-12-22 09:48:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 6315. [2020-12-22 09:48:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6315 states. [2020-12-22 09:48:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 9295 transitions. [2020-12-22 09:48:41,804 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 9295 transitions. Word has length 80 [2020-12-22 09:48:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:41,804 INFO L481 AbstractCegarLoop]: Abstraction has 6315 states and 9295 transitions. [2020-12-22 09:48:41,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 9295 transitions. [2020-12-22 09:48:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:48:41,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:41,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:41,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:48:41,807 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:41,808 INFO L82 PathProgramCache]: Analyzing trace with hash -787636643, now seen corresponding path program 1 times [2020-12-22 09:48:41,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:41,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245102401] [2020-12-22 09:48:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:48:41,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245102401] [2020-12-22 09:48:41,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:41,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:48:41,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11242999] [2020-12-22 09:48:41,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:48:41,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:41,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:48:41,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:48:41,917 INFO L87 Difference]: Start difference. First operand 6315 states and 9295 transitions. Second operand 6 states. [2020-12-22 09:48:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:42,585 INFO L93 Difference]: Finished difference Result 10549 states and 15380 transitions. [2020-12-22 09:48:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:48:42,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:48:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:42,609 INFO L225 Difference]: With dead ends: 10549 [2020-12-22 09:48:42,609 INFO L226 Difference]: Without dead ends: 9491 [2020-12-22 09:48:42,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:48:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9491 states. [2020-12-22 09:48:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9491 to 7371. [2020-12-22 09:48:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7371 states. [2020-12-22 09:48:43,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7371 states to 7371 states and 10799 transitions. [2020-12-22 09:48:43,069 INFO L78 Accepts]: Start accepts. Automaton has 7371 states and 10799 transitions. Word has length 80 [2020-12-22 09:48:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:43,069 INFO L481 AbstractCegarLoop]: Abstraction has 7371 states and 10799 transitions. [2020-12-22 09:48:43,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:48:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7371 states and 10799 transitions. [2020-12-22 09:48:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:43,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:43,072 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:43,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:48:43,073 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:43,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1630109958, now seen corresponding path program 1 times [2020-12-22 09:48:43,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:43,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384550759] [2020-12-22 09:48:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:43,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384550759] [2020-12-22 09:48:43,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:43,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:43,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321616083] [2020-12-22 09:48:43,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:43,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:43,137 INFO L87 Difference]: Start difference. First operand 7371 states and 10799 transitions. Second operand 3 states. [2020-12-22 09:48:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,358 INFO L93 Difference]: Finished difference Result 10279 states and 14937 transitions. [2020-12-22 09:48:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:43,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,369 INFO L225 Difference]: With dead ends: 10279 [2020-12-22 09:48:43,369 INFO L226 Difference]: Without dead ends: 4469 [2020-12-22 09:48:43,378 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 09:48:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2020-12-22 09:48:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 4467. [2020-12-22 09:48:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-12-22 09:48:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6619 transitions. [2020-12-22 09:48:43,599 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6619 transitions. Word has length 81 [2020-12-22 09:48:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:43,599 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6619 transitions. [2020-12-22 09:48:43,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6619 transitions. [2020-12-22 09:48:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:43,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:43,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:48:43,602 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:43,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1078255044, now seen corresponding path program 1 times [2020-12-22 09:48:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:43,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47233086] [2020-12-22 09:48:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:43,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47233086] [2020-12-22 09:48:43,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:43,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:43,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654394479] [2020-12-22 09:48:43,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:43,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:43,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:43,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:43,671 INFO L87 Difference]: Start difference. First operand 4467 states and 6619 transitions. Second operand 3 states. [2020-12-22 09:48:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:43,805 INFO L93 Difference]: Finished difference Result 5923 states and 8667 transitions. [2020-12-22 09:48:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:43,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:43,813 INFO L225 Difference]: With dead ends: 5923 [2020-12-22 09:48:43,814 INFO L226 Difference]: Without dead ends: 3017 [2020-12-22 09:48:43,819 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 09:48:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2020-12-22 09:48:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 3015. [2020-12-22 09:48:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3015 states. [2020-12-22 09:48:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 4551 transitions. [2020-12-22 09:48:43,954 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 4551 transitions. Word has length 81 [2020-12-22 09:48:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:43,954 INFO L481 AbstractCegarLoop]: Abstraction has 3015 states and 4551 transitions. [2020-12-22 09:48:43,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 4551 transitions. [2020-12-22 09:48:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:43,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:43,957 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:43,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:48:43,958 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1165373838, now seen corresponding path program 1 times [2020-12-22 09:48:43,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:43,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843864272] [2020-12-22 09:48:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:44,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843864272] [2020-12-22 09:48:44,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:48:44,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:48:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373941776] [2020-12-22 09:48:44,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:48:44,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:44,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:48:44,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:48:44,038 INFO L87 Difference]: Start difference. First operand 3015 states and 4551 transitions. Second operand 3 states. [2020-12-22 09:48:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:44,114 INFO L93 Difference]: Finished difference Result 3745 states and 5565 transitions. [2020-12-22 09:48:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:48:44,114 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-22 09:48:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:44,120 INFO L225 Difference]: With dead ends: 3745 [2020-12-22 09:48:44,120 INFO L226 Difference]: Without dead ends: 2291 [2020-12-22 09:48:44,124 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 09:48:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-12-22 09:48:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2289. [2020-12-22 09:48:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2289 states. [2020-12-22 09:48:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3528 transitions. [2020-12-22 09:48:44,206 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3528 transitions. Word has length 81 [2020-12-22 09:48:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:44,206 INFO L481 AbstractCegarLoop]: Abstraction has 2289 states and 3528 transitions. [2020-12-22 09:48:44,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:48:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3528 transitions. [2020-12-22 09:48:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 09:48:44,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:44,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:44,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:48:44,208 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:44,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:44,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2010318248, now seen corresponding path program 1 times [2020-12-22 09:48:44,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:44,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777659312] [2020-12-22 09:48:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:44,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777659312] [2020-12-22 09:48:44,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247685732] [2020-12-22 09:48:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:48:44,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:48:45,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:45,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-22 09:48:45,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442728130] [2020-12-22 09:48:45,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:48:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:45,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:48:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:48:45,075 INFO L87 Difference]: Start difference. First operand 2289 states and 3528 transitions. Second operand 12 states. [2020-12-22 09:48:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:47,221 INFO L93 Difference]: Finished difference Result 5722 states and 8177 transitions. [2020-12-22 09:48:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 09:48:47,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2020-12-22 09:48:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:47,236 INFO L225 Difference]: With dead ends: 5722 [2020-12-22 09:48:47,236 INFO L226 Difference]: Without dead ends: 4994 [2020-12-22 09:48:47,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 09:48:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2020-12-22 09:48:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4081. [2020-12-22 09:48:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4081 states. [2020-12-22 09:48:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5817 transitions. [2020-12-22 09:48:47,622 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5817 transitions. Word has length 81 [2020-12-22 09:48:47,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:47,623 INFO L481 AbstractCegarLoop]: Abstraction has 4081 states and 5817 transitions. [2020-12-22 09:48:47,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:48:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5817 transitions. [2020-12-22 09:48:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:47,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:47,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:47,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:47,839 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:47,840 INFO L82 PathProgramCache]: Analyzing trace with hash -599443483, now seen corresponding path program 1 times [2020-12-22 09:48:47,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:47,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855096307] [2020-12-22 09:48:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:48,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855096307] [2020-12-22 09:48:48,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265364025] [2020-12-22 09:48:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:48:48,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:48,559 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:49,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:49,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:48:49,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641170845] [2020-12-22 09:48:49,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:48:49,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:48:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:48:49,020 INFO L87 Difference]: Start difference. First operand 4081 states and 5817 transitions. Second operand 17 states. [2020-12-22 09:48:49,163 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:48:49,311 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-22 09:48:49,450 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:48:51,517 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:48:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:52,835 INFO L93 Difference]: Finished difference Result 14199 states and 18973 transitions. [2020-12-22 09:48:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:48:52,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:48:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:52,869 INFO L225 Difference]: With dead ends: 14199 [2020-12-22 09:48:52,870 INFO L226 Difference]: Without dead ends: 11892 [2020-12-22 09:48:52,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:48:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11892 states. [2020-12-22 09:48:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11892 to 8112. [2020-12-22 09:48:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8112 states. [2020-12-22 09:48:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8112 states to 8112 states and 10999 transitions. [2020-12-22 09:48:53,533 INFO L78 Accepts]: Start accepts. Automaton has 8112 states and 10999 transitions. Word has length 82 [2020-12-22 09:48:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:48:53,534 INFO L481 AbstractCegarLoop]: Abstraction has 8112 states and 10999 transitions. [2020-12-22 09:48:53,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:48:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 8112 states and 10999 transitions. [2020-12-22 09:48:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:48:53,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:48:53,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:48:53,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:53,745 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:48:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:48:53,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1731083323, now seen corresponding path program 1 times [2020-12-22 09:48:53,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:48:53,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289145524] [2020-12-22 09:48:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:48:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:54,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289145524] [2020-12-22 09:48:54,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517822377] [2020-12-22 09:48:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:48:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:48:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:48:54,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:48:54,477 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:48:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:48:54,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:48:54,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:48:54,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685626273] [2020-12-22 09:48:54,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:48:54,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:48:54,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:48:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:48:54,853 INFO L87 Difference]: Start difference. First operand 8112 states and 10999 transitions. Second operand 17 states. [2020-12-22 09:48:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:48:58,772 INFO L93 Difference]: Finished difference Result 32062 states and 42222 transitions. [2020-12-22 09:48:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:48:58,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 09:48:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:48:58,831 INFO L225 Difference]: With dead ends: 32062 [2020-12-22 09:48:58,832 INFO L226 Difference]: Without dead ends: 26546 [2020-12-22 09:48:58,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=957, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:48:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26546 states. [2020-12-22 09:49:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26546 to 18920. [2020-12-22 09:49:00,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18920 states. [2020-12-22 09:49:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18920 states to 18920 states and 24733 transitions. [2020-12-22 09:49:00,750 INFO L78 Accepts]: Start accepts. Automaton has 18920 states and 24733 transitions. Word has length 82 [2020-12-22 09:49:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:00,750 INFO L481 AbstractCegarLoop]: Abstraction has 18920 states and 24733 transitions. [2020-12-22 09:49:00,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 18920 states and 24733 transitions. [2020-12-22 09:49:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:00,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:00,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:00,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:00,969 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:00,970 INFO L82 PathProgramCache]: Analyzing trace with hash -895278877, now seen corresponding path program 1 times [2020-12-22 09:49:00,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:00,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503177809] [2020-12-22 09:49:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:49:01,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503177809] [2020-12-22 09:49:01,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:01,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:01,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609151393] [2020-12-22 09:49:01,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:01,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:01,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:01,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:01,069 INFO L87 Difference]: Start difference. First operand 18920 states and 24733 transitions. Second operand 6 states. [2020-12-22 09:49:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:02,710 INFO L93 Difference]: Finished difference Result 33364 states and 43333 transitions. [2020-12-22 09:49:02,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:02,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:02,748 INFO L225 Difference]: With dead ends: 33364 [2020-12-22 09:49:02,748 INFO L226 Difference]: Without dead ends: 16077 [2020-12-22 09:49:02,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16077 states. [2020-12-22 09:49:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16077 to 16077. [2020-12-22 09:49:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16077 states. [2020-12-22 09:49:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16077 states to 16077 states and 20849 transitions. [2020-12-22 09:49:04,219 INFO L78 Accepts]: Start accepts. Automaton has 16077 states and 20849 transitions. Word has length 82 [2020-12-22 09:49:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:04,219 INFO L481 AbstractCegarLoop]: Abstraction has 16077 states and 20849 transitions. [2020-12-22 09:49:04,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 16077 states and 20849 transitions. [2020-12-22 09:49:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:04,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:04,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:04,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:49:04,222 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:04,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1328829219, now seen corresponding path program 1 times [2020-12-22 09:49:04,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:04,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309415612] [2020-12-22 09:49:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:49:04,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309415612] [2020-12-22 09:49:04,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:04,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:04,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106169944] [2020-12-22 09:49:04,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:04,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:04,307 INFO L87 Difference]: Start difference. First operand 16077 states and 20849 transitions. Second operand 6 states. [2020-12-22 09:49:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:05,547 INFO L93 Difference]: Finished difference Result 26822 states and 34514 transitions. [2020-12-22 09:49:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:05,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:05,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:05,572 INFO L225 Difference]: With dead ends: 26822 [2020-12-22 09:49:05,572 INFO L226 Difference]: Without dead ends: 12404 [2020-12-22 09:49:05,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12404 states. [2020-12-22 09:49:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12404 to 12404. [2020-12-22 09:49:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12404 states. [2020-12-22 09:49:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12404 states to 12404 states and 16071 transitions. [2020-12-22 09:49:06,696 INFO L78 Accepts]: Start accepts. Automaton has 12404 states and 16071 transitions. Word has length 82 [2020-12-22 09:49:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:06,696 INFO L481 AbstractCegarLoop]: Abstraction has 12404 states and 16071 transitions. [2020-12-22 09:49:06,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 12404 states and 16071 transitions. [2020-12-22 09:49:06,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:49:06,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:06,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:06,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:49:06,699 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:06,699 INFO L82 PathProgramCache]: Analyzing trace with hash 2082803715, now seen corresponding path program 1 times [2020-12-22 09:49:06,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:06,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762012424] [2020-12-22 09:49:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 09:49:06,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762012424] [2020-12-22 09:49:06,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:06,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:06,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425633243] [2020-12-22 09:49:06,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:06,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:06,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:06,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:06,786 INFO L87 Difference]: Start difference. First operand 12404 states and 16071 transitions. Second operand 6 states. [2020-12-22 09:49:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:07,777 INFO L93 Difference]: Finished difference Result 20759 states and 26632 transitions. [2020-12-22 09:49:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:07,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:49:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:07,793 INFO L225 Difference]: With dead ends: 20759 [2020-12-22 09:49:07,793 INFO L226 Difference]: Without dead ends: 9932 [2020-12-22 09:49:07,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9932 states. [2020-12-22 09:49:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9932 to 9932. [2020-12-22 09:49:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9932 states. [2020-12-22 09:49:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 12952 transitions. [2020-12-22 09:49:08,588 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 12952 transitions. Word has length 82 [2020-12-22 09:49:08,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:08,589 INFO L481 AbstractCegarLoop]: Abstraction has 9932 states and 12952 transitions. [2020-12-22 09:49:08,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 12952 transitions. [2020-12-22 09:49:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:08,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:08,590 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:08,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:49:08,591 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1931365342, now seen corresponding path program 1 times [2020-12-22 09:49:08,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:08,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703917837] [2020-12-22 09:49:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:08,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703917837] [2020-12-22 09:49:08,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749032042] [2020-12-22 09:49:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:49:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:09,084 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:49:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:09,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:09,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:49:09,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17084865] [2020-12-22 09:49:09,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:49:09,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:49:09,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:49:09,396 INFO L87 Difference]: Start difference. First operand 9932 states and 12952 transitions. Second operand 17 states. [2020-12-22 09:49:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:14,542 INFO L93 Difference]: Finished difference Result 42734 states and 53392 transitions. [2020-12-22 09:49:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:49:14,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-12-22 09:49:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:14,595 INFO L225 Difference]: With dead ends: 42734 [2020-12-22 09:49:14,595 INFO L226 Difference]: Without dead ends: 35713 [2020-12-22 09:49:14,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 09:49:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35713 states. [2020-12-22 09:49:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35713 to 22851. [2020-12-22 09:49:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22851 states. [2020-12-22 09:49:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22851 states to 22851 states and 29001 transitions. [2020-12-22 09:49:17,091 INFO L78 Accepts]: Start accepts. Automaton has 22851 states and 29001 transitions. Word has length 83 [2020-12-22 09:49:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:17,092 INFO L481 AbstractCegarLoop]: Abstraction has 22851 states and 29001 transitions. [2020-12-22 09:49:17,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:49:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 22851 states and 29001 transitions. [2020-12-22 09:49:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 09:49:17,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:17,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:17,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:17,295 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:17,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1033972064, now seen corresponding path program 1 times [2020-12-22 09:49:17,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:17,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829511022] [2020-12-22 09:49:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:49:17,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829511022] [2020-12-22 09:49:17,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:49:17,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:49:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898106656] [2020-12-22 09:49:17,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:49:17,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:17,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:49:17,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:49:17,416 INFO L87 Difference]: Start difference. First operand 22851 states and 29001 transitions. Second operand 6 states. [2020-12-22 09:49:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:19,562 INFO L93 Difference]: Finished difference Result 38944 states and 48957 transitions. [2020-12-22 09:49:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:49:19,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-22 09:49:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:19,585 INFO L225 Difference]: With dead ends: 38944 [2020-12-22 09:49:19,585 INFO L226 Difference]: Without dead ends: 17826 [2020-12-22 09:49:19,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:49:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17826 states. [2020-12-22 09:49:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17826 to 17826. [2020-12-22 09:49:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17826 states. [2020-12-22 09:49:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17826 states to 17826 states and 22398 transitions. [2020-12-22 09:49:21,460 INFO L78 Accepts]: Start accepts. Automaton has 17826 states and 22398 transitions. Word has length 83 [2020-12-22 09:49:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:21,461 INFO L481 AbstractCegarLoop]: Abstraction has 17826 states and 22398 transitions. [2020-12-22 09:49:21,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:49:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 17826 states and 22398 transitions. [2020-12-22 09:49:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:49:21,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:21,463 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:21,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 09:49:21,463 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:21,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:21,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1324644796, now seen corresponding path program 1 times [2020-12-22 09:49:21,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:21,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125153443] [2020-12-22 09:49:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:23,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125153443] [2020-12-22 09:49:23,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944868901] [2020-12-22 09:49:23,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:23,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 09:49:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:23,805 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:24,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:24,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 13] total 40 [2020-12-22 09:49:24,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226659353] [2020-12-22 09:49:24,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 09:49:24,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:24,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 09:49:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 09:49:24,616 INFO L87 Difference]: Start difference. First operand 17826 states and 22398 transitions. Second operand 40 states. [2020-12-22 09:49:25,154 WARN L197 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 09:49:26,805 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-22 09:49:27,065 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 09:49:27,409 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-12-22 09:49:27,828 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-12-22 09:49:28,357 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-12-22 09:49:28,831 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-12-22 09:49:29,411 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-12-22 09:49:29,940 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-12-22 09:49:30,285 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:49:30,656 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-12-22 09:49:30,947 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:49:31,307 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:49:31,610 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-22 09:49:31,970 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-12-22 09:49:32,199 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:49:32,632 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-22 09:49:33,351 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-12-22 09:49:33,764 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:49:34,118 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:34,922 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-22 09:49:35,171 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-12-22 09:49:35,440 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:35,815 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:49:36,298 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:49:36,531 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:36,728 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:37,200 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:49:37,421 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-12-22 09:49:38,043 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-12-22 09:49:38,382 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:38,590 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:39,813 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:41,049 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-12-22 09:49:41,378 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-22 09:49:41,634 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:49:42,143 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:49:42,420 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-22 09:49:42,764 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:49:42,997 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 09:49:43,235 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-12-22 09:49:43,416 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 09:49:43,606 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 09:49:43,812 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:44,162 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-22 09:49:44,347 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:49:44,750 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2020-12-22 09:49:45,058 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-12-22 09:49:45,403 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 09:49:45,601 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:49:45,848 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:49:46,111 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 09:49:46,337 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:49:46,978 WARN L197 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-12-22 09:49:47,182 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:47,505 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 09:49:48,373 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-12-22 09:49:48,600 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-12-22 09:49:51,489 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-12-22 09:49:51,823 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:49:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:49:52,870 INFO L93 Difference]: Finished difference Result 30408 states and 38228 transitions. [2020-12-22 09:49:52,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-22 09:49:52,871 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-12-22 09:49:52,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:49:52,897 INFO L225 Difference]: With dead ends: 30408 [2020-12-22 09:49:52,897 INFO L226 Difference]: Without dead ends: 24257 [2020-12-22 09:49:52,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=2729, Invalid=17011, Unknown=0, NotChecked=0, Total=19740 [2020-12-22 09:49:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24257 states. [2020-12-22 09:49:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24257 to 16024. [2020-12-22 09:49:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16024 states. [2020-12-22 09:49:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16024 states to 16024 states and 20259 transitions. [2020-12-22 09:49:54,676 INFO L78 Accepts]: Start accepts. Automaton has 16024 states and 20259 transitions. Word has length 84 [2020-12-22 09:49:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:49:54,676 INFO L481 AbstractCegarLoop]: Abstraction has 16024 states and 20259 transitions. [2020-12-22 09:49:54,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 09:49:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 16024 states and 20259 transitions. [2020-12-22 09:49:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:49:54,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:49:54,678 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:49:54,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:49:54,893 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:49:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:49:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash -179145348, now seen corresponding path program 1 times [2020-12-22 09:49:54,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:49:54,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906300417] [2020-12-22 09:49:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:49:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:55,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906300417] [2020-12-22 09:49:55,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967185528] [2020-12-22 09:49:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:49:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:49:55,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:49:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:49:55,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:49:56,300 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2020-12-22 09:49:56,737 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-22 09:49:56,966 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-12-22 09:49:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:49:57,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:49:57,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-12-22 09:49:57,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422162823] [2020-12-22 09:49:57,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:49:57,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:49:57,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:49:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:49:57,032 INFO L87 Difference]: Start difference. First operand 16024 states and 20259 transitions. Second operand 23 states. [2020-12-22 09:49:57,188 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 09:49:57,921 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:49:58,117 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 09:49:58,495 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 09:49:58,740 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-12-22 09:49:59,014 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-12-22 09:49:59,445 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:49:59,927 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:00,512 WARN L197 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-22 09:50:00,879 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-12-22 09:50:01,316 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-12-22 09:50:01,666 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:50:02,135 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:50:02,364 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:50:02,735 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:50:02,995 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-22 09:50:03,433 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-12-22 09:50:04,065 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 09:50:04,354 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-12-22 09:50:05,023 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2020-12-22 09:50:05,914 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-12-22 09:50:06,139 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:50:06,442 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 09:50:06,775 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-12-22 09:50:07,412 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-22 09:50:07,807 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-12-22 09:50:08,397 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-12-22 09:50:08,675 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 09:50:08,861 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:09,437 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:09,756 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:09,998 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:10,195 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:10,517 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:10,899 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:11,108 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-12-22 09:50:11,378 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 09:50:11,779 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-12-22 09:50:12,082 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 09:50:12,686 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-22 09:50:12,935 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-12-22 09:50:13,206 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:50:13,894 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2020-12-22 09:50:14,271 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:50:14,904 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:50:15,308 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-12-22 09:50:15,880 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:50:16,354 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-22 09:50:16,564 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-12-22 09:50:16,975 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-12-22 09:50:17,284 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 09:50:17,635 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:50:19,200 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-22 09:50:19,762 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 09:50:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:21,331 INFO L93 Difference]: Finished difference Result 30140 states and 38384 transitions. [2020-12-22 09:50:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:50:21,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 84 [2020-12-22 09:50:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:21,350 INFO L225 Difference]: With dead ends: 30140 [2020-12-22 09:50:21,350 INFO L226 Difference]: Without dead ends: 21459 [2020-12-22 09:50:21,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3995 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1522, Invalid=10468, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 09:50:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21459 states. [2020-12-22 09:50:22,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21459 to 11771. [2020-12-22 09:50:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11771 states. [2020-12-22 09:50:22,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11771 states to 11771 states and 15117 transitions. [2020-12-22 09:50:22,806 INFO L78 Accepts]: Start accepts. Automaton has 11771 states and 15117 transitions. Word has length 84 [2020-12-22 09:50:22,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:22,807 INFO L481 AbstractCegarLoop]: Abstraction has 11771 states and 15117 transitions. [2020-12-22 09:50:22,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:50:22,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11771 states and 15117 transitions. [2020-12-22 09:50:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 09:50:22,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:22,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:23,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:50:23,023 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:23,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash -696943534, now seen corresponding path program 1 times [2020-12-22 09:50:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:23,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920727879] [2020-12-22 09:50:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:23,520 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-22 09:50:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:23,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920727879] [2020-12-22 09:50:23,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125620256] [2020-12-22 09:50:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:50:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:23,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 09:50:23,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:50:24,398 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:50:24,710 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 29 [2020-12-22 09:50:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:25,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:50:25,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-12-22 09:50:25,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673526653] [2020-12-22 09:50:25,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 09:50:25,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:25,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 09:50:25,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2020-12-22 09:50:25,400 INFO L87 Difference]: Start difference. First operand 11771 states and 15117 transitions. Second operand 24 states. [2020-12-22 09:50:25,998 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2020-12-22 09:50:26,287 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:50:26,602 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-12-22 09:50:26,903 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-12-22 09:50:27,384 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:50:27,720 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2020-12-22 09:50:28,230 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 09:50:28,771 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:50:28,990 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-12-22 09:50:29,364 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 09:50:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:31,429 INFO L93 Difference]: Finished difference Result 18601 states and 23377 transitions. [2020-12-22 09:50:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:50:31,430 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-12-22 09:50:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:31,443 INFO L225 Difference]: With dead ends: 18601 [2020-12-22 09:50:31,443 INFO L226 Difference]: Without dead ends: 13706 [2020-12-22 09:50:31,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 09:50:31,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-12-22 09:50:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 9679. [2020-12-22 09:50:32,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9679 states. [2020-12-22 09:50:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 12586 transitions. [2020-12-22 09:50:32,631 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 12586 transitions. Word has length 86 [2020-12-22 09:50:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:32,631 INFO L481 AbstractCegarLoop]: Abstraction has 9679 states and 12586 transitions. [2020-12-22 09:50:32,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 09:50:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 12586 transitions. [2020-12-22 09:50:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 09:50:32,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:32,633 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:32,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 09:50:32,843 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:32,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1982923147, now seen corresponding path program 1 times [2020-12-22 09:50:32,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:32,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716971839] [2020-12-22 09:50:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 09:50:32,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716971839] [2020-12-22 09:50:32,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:32,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:50:32,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486947581] [2020-12-22 09:50:32,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:32,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:32,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:32,915 INFO L87 Difference]: Start difference. First operand 9679 states and 12586 transitions. Second operand 3 states. [2020-12-22 09:50:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:43,400 INFO L93 Difference]: Finished difference Result 12685 states and 17513 transitions. [2020-12-22 09:50:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:43,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 09:50:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:43,414 INFO L225 Difference]: With dead ends: 12685 [2020-12-22 09:50:43,415 INFO L226 Difference]: Without dead ends: 11181 [2020-12-22 09:50:43,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-12-22 09:50:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 11181. [2020-12-22 09:50:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11181 states. [2020-12-22 09:50:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11181 states to 11181 states and 14406 transitions. [2020-12-22 09:50:44,706 INFO L78 Accepts]: Start accepts. Automaton has 11181 states and 14406 transitions. Word has length 91 [2020-12-22 09:50:44,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:44,707 INFO L481 AbstractCegarLoop]: Abstraction has 11181 states and 14406 transitions. [2020-12-22 09:50:44,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 11181 states and 14406 transitions. [2020-12-22 09:50:44,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:50:44,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:44,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:50:44,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 09:50:44,709 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1542239403, now seen corresponding path program 1 times [2020-12-22 09:50:44,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:44,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528331727] [2020-12-22 09:50:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:44,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528331727] [2020-12-22 09:50:44,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:44,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:50:44,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488339254] [2020-12-22 09:50:44,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:50:44,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:44,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:50:44,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:44,780 INFO L87 Difference]: Start difference. First operand 11181 states and 14406 transitions. Second operand 3 states. [2020-12-22 09:50:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:50:55,743 INFO L93 Difference]: Finished difference Result 17193 states and 22974 transitions. [2020-12-22 09:50:55,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:50:55,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2020-12-22 09:50:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:50:55,758 INFO L225 Difference]: With dead ends: 17193 [2020-12-22 09:50:55,758 INFO L226 Difference]: Without dead ends: 14187 [2020-12-22 09:50:55,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:50:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14187 states. [2020-12-22 09:50:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14187 to 14185. [2020-12-22 09:50:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14185 states. [2020-12-22 09:50:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14185 states to 14185 states and 18107 transitions. [2020-12-22 09:50:56,985 INFO L78 Accepts]: Start accepts. Automaton has 14185 states and 18107 transitions. Word has length 95 [2020-12-22 09:50:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:50:56,985 INFO L481 AbstractCegarLoop]: Abstraction has 14185 states and 18107 transitions. [2020-12-22 09:50:56,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:50:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 14185 states and 18107 transitions. [2020-12-22 09:50:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 09:50:56,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:50:56,989 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:50:56,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-22 09:50:56,989 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:50:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:50:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1394102410, now seen corresponding path program 1 times [2020-12-22 09:50:56,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:50:56,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558666085] [2020-12-22 09:50:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:50:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:50:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:50:57,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558666085] [2020-12-22 09:50:57,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:50:57,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:50:57,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727217578] [2020-12-22 09:50:57,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:50:57,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:50:57,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:50:57,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:50:57,221 INFO L87 Difference]: Start difference. First operand 14185 states and 18107 transitions. Second operand 4 states. [2020-12-22 09:51:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:13,815 INFO L93 Difference]: Finished difference Result 26954 states and 34887 transitions. [2020-12-22 09:51:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:51:13,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 129 [2020-12-22 09:51:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:13,845 INFO L225 Difference]: With dead ends: 26954 [2020-12-22 09:51:13,846 INFO L226 Difference]: Without dead ends: 20944 [2020-12-22 09:51:13,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:51:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20944 states. [2020-12-22 09:51:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20944 to 20944. [2020-12-22 09:51:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20944 states. [2020-12-22 09:51:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20944 states to 20944 states and 26620 transitions. [2020-12-22 09:51:15,230 INFO L78 Accepts]: Start accepts. Automaton has 20944 states and 26620 transitions. Word has length 129 [2020-12-22 09:51:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:15,231 INFO L481 AbstractCegarLoop]: Abstraction has 20944 states and 26620 transitions. [2020-12-22 09:51:15,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:51:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 20944 states and 26620 transitions. [2020-12-22 09:51:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 09:51:15,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:15,236 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:15,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-22 09:51:15,237 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:15,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1962757225, now seen corresponding path program 1 times [2020-12-22 09:51:15,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:15,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196582140] [2020-12-22 09:51:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:15,643 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 14 [2020-12-22 09:51:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:15,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196582140] [2020-12-22 09:51:15,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533551457] [2020-12-22 09:51:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:15,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 09:51:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 12 proven. 81 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 09:51:16,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:51:16,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2020-12-22 09:51:16,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501063501] [2020-12-22 09:51:16,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:51:16,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:51:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:51:16,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:51:16,558 INFO L87 Difference]: Start difference. First operand 20944 states and 26620 transitions. Second operand 15 states. [2020-12-22 09:51:16,719 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-22 09:51:17,305 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-22 09:51:17,617 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:17,821 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:18,251 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:18,602 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:18,995 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:19,205 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:19,435 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:19,752 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:19,936 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:51:20,148 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:20,922 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 09:51:21,542 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-12-22 09:51:21,777 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:22,021 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-22 09:51:22,413 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:22,626 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2020-12-22 09:51:22,795 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:23,394 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-22 09:51:24,121 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2020-12-22 09:51:24,323 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:24,513 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-22 09:51:25,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:51:25,017 INFO L93 Difference]: Finished difference Result 32825 states and 41286 transitions. [2020-12-22 09:51:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 09:51:25,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 135 [2020-12-22 09:51:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:51:25,064 INFO L225 Difference]: With dead ends: 32825 [2020-12-22 09:51:25,064 INFO L226 Difference]: Without dead ends: 25371 [2020-12-22 09:51:25,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 09:51:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25371 states. [2020-12-22 09:51:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25371 to 25255. [2020-12-22 09:51:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25255 states. [2020-12-22 09:51:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25255 states to 25255 states and 31341 transitions. [2020-12-22 09:51:27,397 INFO L78 Accepts]: Start accepts. Automaton has 25255 states and 31341 transitions. Word has length 135 [2020-12-22 09:51:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:51:27,397 INFO L481 AbstractCegarLoop]: Abstraction has 25255 states and 31341 transitions. [2020-12-22 09:51:27,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:51:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25255 states and 31341 transitions. [2020-12-22 09:51:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 09:51:27,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:51:27,402 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:51:27,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 09:51:27,610 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:51:27,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:51:27,610 INFO L82 PathProgramCache]: Analyzing trace with hash 789268438, now seen corresponding path program 1 times [2020-12-22 09:51:27,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:51:27,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890639051] [2020-12-22 09:51:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:51:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:51:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890639051] [2020-12-22 09:51:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348663943] [2020-12-22 09:51:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:51:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:51:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 09:51:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:51:28,634 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-12-22 09:51:29,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:51:29,425 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:29,651 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:30,202 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:31,283 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:32,736 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:34,458 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:36,313 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:37,180 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:37,802 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 09:51:38,658 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:51:39,952 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-12-22 09:51:46,539 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 212