/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.6.ufo.BOUNDED-12.pals+Problem12_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:03:12,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:03:12,307 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:03:12,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:03:12,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:03:12,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:03:12,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:03:12,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:03:12,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:03:12,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:03:12,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:03:12,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:03:12,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:03:12,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:03:12,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:03:12,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:03:12,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:03:12,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:03:12,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:03:12,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:03:12,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:03:12,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:03:12,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:03:12,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:03:12,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 10:03:12,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 10:03:12,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 10:03:12,423 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 10:03:12,424 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 10:03:12,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 10:03:12,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:03:12,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:03:12,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:03:12,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:03:12,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:03:12,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:03:12,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:03:12,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:03:12,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:03:12,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:03:12,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:03:12,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:03:12,489 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:03:12,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:03:12,493 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:03:12,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:03:12,494 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:03:12,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:03:12,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:03:12,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:03:12,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:03:12,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:03:12,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:03:12,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:03:12,496 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:03:12,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:03:12,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:03:12,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:03:12,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:03:12,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:03:12,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:03:12,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:03:12,498 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:03:12,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:03:12,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:03:12,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:03:12,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:03:12,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:03:12,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:03:12,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:03:12,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:03:12,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:03:12,935 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:03:12,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c [2020-12-22 10:03:13,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1797b00d/5b7aa1cccda5457c961b5f24086bb6cb/FLAG65457ad7f [2020-12-22 10:03:13,990 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:03:13,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c [2020-12-22 10:03:14,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1797b00d/5b7aa1cccda5457c961b5f24086bb6cb/FLAG65457ad7f [2020-12-22 10:03:14,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1797b00d/5b7aa1cccda5457c961b5f24086bb6cb [2020-12-22 10:03:14,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:03:14,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:03:14,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:03:14,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:03:14,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:03:14,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:03:14" (1/1) ... [2020-12-22 10:03:14,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371bfb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:14, skipping insertion in model container [2020-12-22 10:03:14,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:03:14" (1/1) ... [2020-12-22 10:03:14,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:03:14,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:03:15,224 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.6.ufo.BOUNDED-12.pals+Problem12_label01.c[15586,15599] [2020-12-22 10:03:15,271 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.6.ufo.BOUNDED-12.pals+Problem12_label01.c[20898,20911] [2020-12-22 10:03:16,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:03:16,417 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:03:16,508 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.6.ufo.BOUNDED-12.pals+Problem12_label01.c[15586,15599] [2020-12-22 10:03:16,523 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.6.ufo.BOUNDED-12.pals+Problem12_label01.c[20898,20911] [2020-12-22 10:03:17,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:03:17,349 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:03:17,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17 WrapperNode [2020-12-22 10:03:17,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:03:17,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:03:17,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:03:17,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:03:17,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:17,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:17,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:03:17,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:03:17,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:03:17,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:03:17,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:17,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:18,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:18,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:18,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:18,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:18,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (1/1) ... [2020-12-22 10:03:18,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:03:18,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:03:18,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:03:18,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:03:18,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (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 10:03:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:03:18,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:03:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:03:18,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:03:23,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:03:23,771 INFO L299 CfgBuilder]: Removed 38 assume(true) statements. [2020-12-22 10:03:23,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:03:23 BoogieIcfgContainer [2020-12-22 10:03:23,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:03:23,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:03:23,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:03:23,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:03:23,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:03:14" (1/3) ... [2020-12-22 10:03:23,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3673e98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:03:23, skipping insertion in model container [2020-12-22 10:03:23,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:03:17" (2/3) ... [2020-12-22 10:03:23,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3673e98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:03:23, skipping insertion in model container [2020-12-22 10:03:23,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:03:23" (3/3) ... [2020-12-22 10:03:23,784 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label01.c [2020-12-22 10:03:23,790 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:03:23,796 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 10:03:23,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 10:03:23,849 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:03:23,849 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:03:23,849 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:03:23,849 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:03:23,849 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:03:23,850 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:03:23,850 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:03:23,850 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:03:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states. [2020-12-22 10:03:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:03:23,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:23,900 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] [2020-12-22 10:03:23,901 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2020-12-22 10:03:23,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:23,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905872436] [2020-12-22 10:03:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:24,160 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 10:03:24,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905872436] [2020-12-22 10:03:24,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:24,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:03:24,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487591389] [2020-12-22 10:03:24,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 10:03:24,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 10:03:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:03:24,193 INFO L87 Difference]: Start difference. First operand 926 states. Second operand 2 states. [2020-12-22 10:03:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:24,292 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2020-12-22 10:03:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 10:03:24,294 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 38 [2020-12-22 10:03:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:24,336 INFO L225 Difference]: With dead ends: 1806 [2020-12-22 10:03:24,336 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:03:24,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 10:03:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:03:24,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:03:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:03:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2020-12-22 10:03:24,471 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2020-12-22 10:03:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:24,472 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2020-12-22 10:03:24,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 10:03:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2020-12-22 10:03:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 10:03:24,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:24,475 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] [2020-12-22 10:03:24,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:03:24,475 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2020-12-22 10:03:24,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:24,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796186079] [2020-12-22 10:03:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:24,685 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 10:03:24,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796186079] [2020-12-22 10:03:24,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:24,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:03:24,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716411872] [2020-12-22 10:03:24,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:03:24,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:24,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:03:24,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:03:24,691 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand 5 states. [2020-12-22 10:03:24,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:24,934 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2020-12-22 10:03:24,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:03:24,935 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 10:03:24,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:24,940 INFO L225 Difference]: With dead ends: 924 [2020-12-22 10:03:24,940 INFO L226 Difference]: Without dead ends: 860 [2020-12-22 10:03:24,942 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 10:03:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-12-22 10:03:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2020-12-22 10:03:24,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2020-12-22 10:03:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2020-12-22 10:03:24,964 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2020-12-22 10:03:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:24,964 INFO L481 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2020-12-22 10:03:24,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:03:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2020-12-22 10:03:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 10:03:24,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:24,974 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] [2020-12-22 10:03:24,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:03:24,975 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:24,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1750363563, now seen corresponding path program 1 times [2020-12-22 10:03:24,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:24,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122805426] [2020-12-22 10:03:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:25,161 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 10:03:25,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122805426] [2020-12-22 10:03:25,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:25,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:03:25,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128713248] [2020-12-22 10:03:25,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:25,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:25,171 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand 3 states. [2020-12-22 10:03:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:30,862 INFO L93 Difference]: Finished difference Result 2364 states and 4453 transitions. [2020-12-22 10:03:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:30,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-12-22 10:03:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:30,875 INFO L225 Difference]: With dead ends: 2364 [2020-12-22 10:03:30,876 INFO L226 Difference]: Without dead ends: 1611 [2020-12-22 10:03:30,878 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 10:03:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2020-12-22 10:03:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2020-12-22 10:03:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2020-12-22 10:03:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2607 transitions. [2020-12-22 10:03:30,928 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2607 transitions. Word has length 48 [2020-12-22 10:03:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:30,929 INFO L481 AbstractCegarLoop]: Abstraction has 1611 states and 2607 transitions. [2020-12-22 10:03:30,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2607 transitions. [2020-12-22 10:03:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:30,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:30,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:30,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:03:30,932 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:30,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:30,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2020-12-22 10:03:30,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:30,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280051758] [2020-12-22 10:03:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:31,044 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 10:03:31,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280051758] [2020-12-22 10:03:31,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:31,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:31,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943479130] [2020-12-22 10:03:31,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:31,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:31,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:31,051 INFO L87 Difference]: Start difference. First operand 1611 states and 2607 transitions. Second operand 3 states. [2020-12-22 10:03:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:31,123 INFO L93 Difference]: Finished difference Result 1725 states and 2787 transitions. [2020-12-22 10:03:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:31,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:03:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:31,135 INFO L225 Difference]: With dead ends: 1725 [2020-12-22 10:03:31,135 INFO L226 Difference]: Without dead ends: 1665 [2020-12-22 10:03:31,136 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 10:03:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2020-12-22 10:03:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2020-12-22 10:03:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1663 states. [2020-12-22 10:03:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2690 transitions. [2020-12-22 10:03:31,199 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2690 transitions. Word has length 77 [2020-12-22 10:03:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:31,200 INFO L481 AbstractCegarLoop]: Abstraction has 1663 states and 2690 transitions. [2020-12-22 10:03:31,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2690 transitions. [2020-12-22 10:03:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:31,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:31,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:31,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:03:31,202 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:31,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2020-12-22 10:03:31,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:31,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180198413] [2020-12-22 10:03:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:31,316 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 10:03:31,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180198413] [2020-12-22 10:03:31,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:31,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:31,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632465491] [2020-12-22 10:03:31,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:31,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:31,319 INFO L87 Difference]: Start difference. First operand 1663 states and 2690 transitions. Second operand 3 states. [2020-12-22 10:03:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:31,383 INFO L93 Difference]: Finished difference Result 1875 states and 3026 transitions. [2020-12-22 10:03:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:31,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2020-12-22 10:03:31,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:31,397 INFO L225 Difference]: With dead ends: 1875 [2020-12-22 10:03:31,398 INFO L226 Difference]: Without dead ends: 1763 [2020-12-22 10:03:31,399 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 10:03:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2020-12-22 10:03:31,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2020-12-22 10:03:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1761 states. [2020-12-22 10:03:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2845 transitions. [2020-12-22 10:03:31,474 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2845 transitions. Word has length 77 [2020-12-22 10:03:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:31,477 INFO L481 AbstractCegarLoop]: Abstraction has 1761 states and 2845 transitions. [2020-12-22 10:03:31,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2845 transitions. [2020-12-22 10:03:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-22 10:03:31,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:31,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:31,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:03:31,479 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2020-12-22 10:03:31,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:31,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026244504] [2020-12-22 10:03:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:31,712 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 10:03:31,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026244504] [2020-12-22 10:03:31,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:31,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:31,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857946569] [2020-12-22 10:03:31,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:31,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:31,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:31,717 INFO L87 Difference]: Start difference. First operand 1761 states and 2845 transitions. Second operand 8 states. [2020-12-22 10:03:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:32,212 INFO L93 Difference]: Finished difference Result 4281 states and 6841 transitions. [2020-12-22 10:03:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:03:32,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 77 [2020-12-22 10:03:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:32,243 INFO L225 Difference]: With dead ends: 4281 [2020-12-22 10:03:32,243 INFO L226 Difference]: Without dead ends: 4071 [2020-12-22 10:03:32,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:03:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2020-12-22 10:03:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2020-12-22 10:03:32,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-12-22 10:03:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3169 transitions. [2020-12-22 10:03:32,355 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3169 transitions. Word has length 77 [2020-12-22 10:03:32,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:32,356 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 3169 transitions. [2020-12-22 10:03:32,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:32,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3169 transitions. [2020-12-22 10:03:32,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:32,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:32,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:32,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:03:32,361 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:32,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:32,366 INFO L82 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2020-12-22 10:03:32,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:32,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525001188] [2020-12-22 10:03:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:32,507 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 10:03:32,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525001188] [2020-12-22 10:03:32,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:32,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:32,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117078757] [2020-12-22 10:03:32,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:32,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:32,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:32,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:32,510 INFO L87 Difference]: Start difference. First operand 1969 states and 3169 transitions. Second operand 3 states. [2020-12-22 10:03:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:32,580 INFO L93 Difference]: Finished difference Result 2589 states and 4141 transitions. [2020-12-22 10:03:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:32,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:32,592 INFO L225 Difference]: With dead ends: 2589 [2020-12-22 10:03:32,592 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:03:32,598 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 10:03:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:03:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:03:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:03:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3477 transitions. [2020-12-22 10:03:32,680 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3477 transitions. Word has length 79 [2020-12-22 10:03:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:32,682 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3477 transitions. [2020-12-22 10:03:32,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3477 transitions. [2020-12-22 10:03:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:32,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:32,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:32,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:03:32,691 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2020-12-22 10:03:32,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:32,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385517968] [2020-12-22 10:03:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:32,987 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 10:03:32,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385517968] [2020-12-22 10:03:32,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:32,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:32,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902865984] [2020-12-22 10:03:32,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:32,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:32,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:32,990 INFO L87 Difference]: Start difference. First operand 2169 states and 3477 transitions. Second operand 8 states. [2020-12-22 10:03:33,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:33,424 INFO L93 Difference]: Finished difference Result 2787 states and 4441 transitions. [2020-12-22 10:03:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:33,425 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 79 [2020-12-22 10:03:33,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:33,436 INFO L225 Difference]: With dead ends: 2787 [2020-12-22 10:03:33,436 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 10:03:33,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:03:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 10:03:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2020-12-22 10:03:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2169 states. [2020-12-22 10:03:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3471 transitions. [2020-12-22 10:03:33,515 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3471 transitions. Word has length 79 [2020-12-22 10:03:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:33,516 INFO L481 AbstractCegarLoop]: Abstraction has 2169 states and 3471 transitions. [2020-12-22 10:03:33,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3471 transitions. [2020-12-22 10:03:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:33,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:33,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:33,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:03:33,518 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:33,519 INFO L82 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2020-12-22 10:03:33,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:33,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907432196] [2020-12-22 10:03:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:33,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:33,598 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 10:03:33,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907432196] [2020-12-22 10:03:33,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:33,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:33,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006187644] [2020-12-22 10:03:33,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:33,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:33,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:33,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:33,602 INFO L87 Difference]: Start difference. First operand 2169 states and 3471 transitions. Second operand 3 states. [2020-12-22 10:03:33,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:33,700 INFO L93 Difference]: Finished difference Result 3329 states and 5265 transitions. [2020-12-22 10:03:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:33,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:33,714 INFO L225 Difference]: With dead ends: 3329 [2020-12-22 10:03:33,714 INFO L226 Difference]: Without dead ends: 2713 [2020-12-22 10:03:33,717 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 10:03:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2020-12-22 10:03:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2020-12-22 10:03:33,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2711 states. [2020-12-22 10:03:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4295 transitions. [2020-12-22 10:03:33,837 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4295 transitions. Word has length 79 [2020-12-22 10:03:33,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:33,838 INFO L481 AbstractCegarLoop]: Abstraction has 2711 states and 4295 transitions. [2020-12-22 10:03:33,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4295 transitions. [2020-12-22 10:03:33,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:33,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:33,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:33,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:03:33,840 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:33,840 INFO L82 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2020-12-22 10:03:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:33,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668935486] [2020-12-22 10:03:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:03:33,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668935486] [2020-12-22 10:03:33,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:33,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:33,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401119321] [2020-12-22 10:03:33,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:33,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:33,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:33,927 INFO L87 Difference]: Start difference. First operand 2711 states and 4295 transitions. Second operand 3 states. [2020-12-22 10:03:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:34,072 INFO L93 Difference]: Finished difference Result 4883 states and 7617 transitions. [2020-12-22 10:03:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:34,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:34,091 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 10:03:34,091 INFO L226 Difference]: Without dead ends: 3725 [2020-12-22 10:03:34,095 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 10:03:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2020-12-22 10:03:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2020-12-22 10:03:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2020-12-22 10:03:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5811 transitions. [2020-12-22 10:03:34,271 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5811 transitions. Word has length 79 [2020-12-22 10:03:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:34,272 INFO L481 AbstractCegarLoop]: Abstraction has 3723 states and 5811 transitions. [2020-12-22 10:03:34,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5811 transitions. [2020-12-22 10:03:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:34,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:34,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:34,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:03:34,274 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:34,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2020-12-22 10:03:34,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:34,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080858981] [2020-12-22 10:03:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:34,341 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 10:03:34,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080858981] [2020-12-22 10:03:34,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:34,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:34,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148580586] [2020-12-22 10:03:34,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:34,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:34,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:34,345 INFO L87 Difference]: Start difference. First operand 3723 states and 5811 transitions. Second operand 3 states. [2020-12-22 10:03:34,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:34,606 INFO L93 Difference]: Finished difference Result 7775 states and 11925 transitions. [2020-12-22 10:03:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:34,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:34,633 INFO L225 Difference]: With dead ends: 7775 [2020-12-22 10:03:34,633 INFO L226 Difference]: Without dead ends: 5605 [2020-12-22 10:03:34,638 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 10:03:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2020-12-22 10:03:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2020-12-22 10:03:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5603 states. [2020-12-22 10:03:34,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8579 transitions. [2020-12-22 10:03:34,977 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8579 transitions. Word has length 79 [2020-12-22 10:03:34,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:34,978 INFO L481 AbstractCegarLoop]: Abstraction has 5603 states and 8579 transitions. [2020-12-22 10:03:34,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8579 transitions. [2020-12-22 10:03:34,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 10:03:34,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:34,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:34,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:03:34,979 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:34,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2020-12-22 10:03:34,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:34,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589087178] [2020-12-22 10:03:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:35,039 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 10:03:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589087178] [2020-12-22 10:03:35,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:35,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:03:35,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161219353] [2020-12-22 10:03:35,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:03:35,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:35,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:03:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:03:35,041 INFO L87 Difference]: Start difference. First operand 5603 states and 8579 transitions. Second operand 3 states. [2020-12-22 10:03:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:35,579 INFO L93 Difference]: Finished difference Result 13127 states and 19749 transitions. [2020-12-22 10:03:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:03:35,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2020-12-22 10:03:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:35,599 INFO L225 Difference]: With dead ends: 13127 [2020-12-22 10:03:35,599 INFO L226 Difference]: Without dead ends: 9077 [2020-12-22 10:03:35,605 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 10:03:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2020-12-22 10:03:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2020-12-22 10:03:36,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9075 states. [2020-12-22 10:03:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13587 transitions. [2020-12-22 10:03:36,137 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13587 transitions. Word has length 79 [2020-12-22 10:03:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:36,137 INFO L481 AbstractCegarLoop]: Abstraction has 9075 states and 13587 transitions. [2020-12-22 10:03:36,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:03:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13587 transitions. [2020-12-22 10:03:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 10:03:36,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:36,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:03:36,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 10:03:36,139 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:36,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:36,139 INFO L82 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2020-12-22 10:03:36,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:36,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846783288] [2020-12-22 10:03:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:36,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:36,251 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 10:03:36,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846783288] [2020-12-22 10:03:36,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:36,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:36,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270280087] [2020-12-22 10:03:36,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:36,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:36,254 INFO L87 Difference]: Start difference. First operand 9075 states and 13587 transitions. Second operand 8 states. [2020-12-22 10:03:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:37,285 INFO L93 Difference]: Finished difference Result 15538 states and 22858 transitions. [2020-12-22 10:03:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:03:37,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-12-22 10:03:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:37,318 INFO L225 Difference]: With dead ends: 15538 [2020-12-22 10:03:37,318 INFO L226 Difference]: Without dead ends: 15536 [2020-12-22 10:03:37,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:03:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2020-12-22 10:03:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2020-12-22 10:03:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9459 states. [2020-12-22 10:03:38,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 13939 transitions. [2020-12-22 10:03:38,153 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 13939 transitions. Word has length 80 [2020-12-22 10:03:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:38,153 INFO L481 AbstractCegarLoop]: Abstraction has 9459 states and 13939 transitions. [2020-12-22 10:03:38,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 13939 transitions. [2020-12-22 10:03:38,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:03:38,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:38,160 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:03:38,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 10:03:38,161 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:38,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:38,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2020-12-22 10:03:38,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:38,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620472879] [2020-12-22 10:03:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 10:03:38,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620472879] [2020-12-22 10:03:38,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:38,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:38,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721008375] [2020-12-22 10:03:38,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:38,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:38,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:38,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:38,369 INFO L87 Difference]: Start difference. First operand 9459 states and 13939 transitions. Second operand 8 states. [2020-12-22 10:03:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:41,486 INFO L93 Difference]: Finished difference Result 58465 states and 84650 transitions. [2020-12-22 10:03:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:41,486 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:03:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:41,603 INFO L225 Difference]: With dead ends: 58465 [2020-12-22 10:03:41,603 INFO L226 Difference]: Without dead ends: 50559 [2020-12-22 10:03:41,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:03:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50559 states. [2020-12-22 10:03:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50559 to 17363. [2020-12-22 10:03:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17363 states. [2020-12-22 10:03:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17363 states to 17363 states and 25267 transitions. [2020-12-22 10:03:43,183 INFO L78 Accepts]: Start accepts. Automaton has 17363 states and 25267 transitions. Word has length 112 [2020-12-22 10:03:43,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:43,183 INFO L481 AbstractCegarLoop]: Abstraction has 17363 states and 25267 transitions. [2020-12-22 10:03:43,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:43,183 INFO L276 IsEmpty]: Start isEmpty. Operand 17363 states and 25267 transitions. [2020-12-22 10:03:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:03:43,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:43,192 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:03:43,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 10:03:43,193 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2020-12-22 10:03:43,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:43,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660791778] [2020-12-22 10:03:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 10:03:43,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660791778] [2020-12-22 10:03:43,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:43,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:43,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633918488] [2020-12-22 10:03:43,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:43,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:43,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:43,344 INFO L87 Difference]: Start difference. First operand 17363 states and 25267 transitions. Second operand 8 states. [2020-12-22 10:03:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:46,984 INFO L93 Difference]: Finished difference Result 66369 states and 95978 transitions. [2020-12-22 10:03:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:46,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:03:46,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:47,129 INFO L225 Difference]: With dead ends: 66369 [2020-12-22 10:03:47,130 INFO L226 Difference]: Without dead ends: 58463 [2020-12-22 10:03:47,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:03:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58463 states. [2020-12-22 10:03:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58463 to 29235. [2020-12-22 10:03:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29235 states. [2020-12-22 10:03:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29235 states to 29235 states and 42179 transitions. [2020-12-22 10:03:49,208 INFO L78 Accepts]: Start accepts. Automaton has 29235 states and 42179 transitions. Word has length 112 [2020-12-22 10:03:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:49,208 INFO L481 AbstractCegarLoop]: Abstraction has 29235 states and 42179 transitions. [2020-12-22 10:03:49,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 29235 states and 42179 transitions. [2020-12-22 10:03:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:03:49,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:49,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:03:49,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 10:03:49,219 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:49,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2020-12-22 10:03:49,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:49,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993116802] [2020-12-22 10:03:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 10:03:49,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993116802] [2020-12-22 10:03:49,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:49,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524502483] [2020-12-22 10:03:49,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:49,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:49,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:49,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:49,372 INFO L87 Difference]: Start difference. First operand 29235 states and 42179 transitions. Second operand 8 states. [2020-12-22 10:03:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:03:52,704 INFO L93 Difference]: Finished difference Result 74273 states and 107306 transitions. [2020-12-22 10:03:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:03:52,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:03:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:03:52,853 INFO L225 Difference]: With dead ends: 74273 [2020-12-22 10:03:52,854 INFO L226 Difference]: Without dead ends: 66367 [2020-12-22 10:03:52,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:03:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66367 states. [2020-12-22 10:03:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66367 to 37139. [2020-12-22 10:03:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37139 states. [2020-12-22 10:03:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37139 states to 37139 states and 53507 transitions. [2020-12-22 10:03:55,321 INFO L78 Accepts]: Start accepts. Automaton has 37139 states and 53507 transitions. Word has length 112 [2020-12-22 10:03:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:03:55,322 INFO L481 AbstractCegarLoop]: Abstraction has 37139 states and 53507 transitions. [2020-12-22 10:03:55,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:03:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 37139 states and 53507 transitions. [2020-12-22 10:03:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:03:55,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:03:55,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:03:55,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 10:03:55,334 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:03:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:03:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2020-12-22 10:03:55,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:03:55,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096659415] [2020-12-22 10:03:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:03:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:03:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 10:03:55,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096659415] [2020-12-22 10:03:55,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:03:55,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:03:55,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514856199] [2020-12-22 10:03:55,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:03:55,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:03:55,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:03:55,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:03:55,474 INFO L87 Difference]: Start difference. First operand 37139 states and 53507 transitions. Second operand 8 states. [2020-12-22 10:04:00,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:00,056 INFO L93 Difference]: Finished difference Result 82177 states and 118634 transitions. [2020-12-22 10:04:00,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:00,057 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:00,143 INFO L225 Difference]: With dead ends: 82177 [2020-12-22 10:04:00,143 INFO L226 Difference]: Without dead ends: 74271 [2020-12-22 10:04:00,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74271 states. [2020-12-22 10:04:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74271 to 45043. [2020-12-22 10:04:03,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45043 states. [2020-12-22 10:04:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45043 states to 45043 states and 64835 transitions. [2020-12-22 10:04:03,432 INFO L78 Accepts]: Start accepts. Automaton has 45043 states and 64835 transitions. Word has length 112 [2020-12-22 10:04:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:03,433 INFO L481 AbstractCegarLoop]: Abstraction has 45043 states and 64835 transitions. [2020-12-22 10:04:03,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 45043 states and 64835 transitions. [2020-12-22 10:04:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:03,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:03,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:03,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 10:04:03,447 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:03,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:03,448 INFO L82 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2020-12-22 10:04:03,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:03,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873247386] [2020-12-22 10:04:03,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 10:04:03,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873247386] [2020-12-22 10:04:03,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:03,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:03,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512871023] [2020-12-22 10:04:03,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:03,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:03,611 INFO L87 Difference]: Start difference. First operand 45043 states and 64835 transitions. Second operand 8 states. [2020-12-22 10:04:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:08,694 INFO L93 Difference]: Finished difference Result 90081 states and 129962 transitions. [2020-12-22 10:04:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:08,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:08,771 INFO L225 Difference]: With dead ends: 90081 [2020-12-22 10:04:08,771 INFO L226 Difference]: Without dead ends: 82175 [2020-12-22 10:04:08,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82175 states. [2020-12-22 10:04:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82175 to 52947. [2020-12-22 10:04:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52947 states. [2020-12-22 10:04:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52947 states to 52947 states and 76163 transitions. [2020-12-22 10:04:12,606 INFO L78 Accepts]: Start accepts. Automaton has 52947 states and 76163 transitions. Word has length 112 [2020-12-22 10:04:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:12,606 INFO L481 AbstractCegarLoop]: Abstraction has 52947 states and 76163 transitions. [2020-12-22 10:04:12,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 52947 states and 76163 transitions. [2020-12-22 10:04:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 10:04:12,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:12,619 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:04:12,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 10:04:12,620 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:12,620 INFO L82 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2020-12-22 10:04:12,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:12,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034147281] [2020-12-22 10:04:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:12,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:04:12,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034147281] [2020-12-22 10:04:12,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:12,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 10:04:12,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266864203] [2020-12-22 10:04:12,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:04:12,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:12,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:04:12,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:04:12,780 INFO L87 Difference]: Start difference. First operand 52947 states and 76163 transitions. Second operand 8 states. [2020-12-22 10:04:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:18,908 INFO L93 Difference]: Finished difference Result 93185 states and 134442 transitions. [2020-12-22 10:04:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:04:18,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 112 [2020-12-22 10:04:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:18,988 INFO L225 Difference]: With dead ends: 93185 [2020-12-22 10:04:18,988 INFO L226 Difference]: Without dead ends: 87679 [2020-12-22 10:04:19,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:04:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87679 states. [2020-12-22 10:04:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87679 to 58451. [2020-12-22 10:04:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58451 states. [2020-12-22 10:04:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58451 states to 58451 states and 84099 transitions. [2020-12-22 10:04:23,618 INFO L78 Accepts]: Start accepts. Automaton has 58451 states and 84099 transitions. Word has length 112 [2020-12-22 10:04:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:23,619 INFO L481 AbstractCegarLoop]: Abstraction has 58451 states and 84099 transitions. [2020-12-22 10:04:23,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:04:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 58451 states and 84099 transitions. [2020-12-22 10:04:23,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:23,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:23,633 INFO L422 BasicCegarLoop]: trace histogram [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, 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 10:04:23,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 10:04:23,633 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:23,634 INFO L82 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2020-12-22 10:04:23,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:23,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727638236] [2020-12-22 10:04:23,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:23,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727638236] [2020-12-22 10:04:23,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:23,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:23,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54868930] [2020-12-22 10:04:23,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:23,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:23,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:23,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:23,709 INFO L87 Difference]: Start difference. First operand 58451 states and 84099 transitions. Second operand 3 states. [2020-12-22 10:04:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:28,353 INFO L93 Difference]: Finished difference Result 115351 states and 165685 transitions. [2020-12-22 10:04:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:28,357 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:28,418 INFO L225 Difference]: With dead ends: 115351 [2020-12-22 10:04:28,418 INFO L226 Difference]: Without dead ends: 58453 [2020-12-22 10:04:28,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:28,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58453 states. [2020-12-22 10:04:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58453 to 58451. [2020-12-22 10:04:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58451 states. [2020-12-22 10:04:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58451 states to 58451 states and 83411 transitions. [2020-12-22 10:04:32,780 INFO L78 Accepts]: Start accepts. Automaton has 58451 states and 83411 transitions. Word has length 113 [2020-12-22 10:04:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:32,780 INFO L481 AbstractCegarLoop]: Abstraction has 58451 states and 83411 transitions. [2020-12-22 10:04:32,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 58451 states and 83411 transitions. [2020-12-22 10:04:32,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:32,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:32,787 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 10:04:32,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 10:04:32,788 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:32,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2020-12-22 10:04:32,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:32,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226742268] [2020-12-22 10:04:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:32,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226742268] [2020-12-22 10:04:32,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:32,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:32,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714925092] [2020-12-22 10:04:32,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:32,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:32,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:32,856 INFO L87 Difference]: Start difference. First operand 58451 states and 83411 transitions. Second operand 3 states. [2020-12-22 10:04:35,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:35,156 INFO L93 Difference]: Finished difference Result 86903 states and 123861 transitions. [2020-12-22 10:04:35,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:35,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:35,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:35,194 INFO L225 Difference]: With dead ends: 86903 [2020-12-22 10:04:35,194 INFO L226 Difference]: Without dead ends: 30005 [2020-12-22 10:04:35,219 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 10:04:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30005 states. [2020-12-22 10:04:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30005 to 30003. [2020-12-22 10:04:37,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30003 states. [2020-12-22 10:04:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30003 states to 30003 states and 42619 transitions. [2020-12-22 10:04:37,559 INFO L78 Accepts]: Start accepts. Automaton has 30003 states and 42619 transitions. Word has length 113 [2020-12-22 10:04:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:37,559 INFO L481 AbstractCegarLoop]: Abstraction has 30003 states and 42619 transitions. [2020-12-22 10:04:37,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 30003 states and 42619 transitions. [2020-12-22 10:04:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:37,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:37,563 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:37,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 10:04:37,564 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1209709145, now seen corresponding path program 1 times [2020-12-22 10:04:37,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:37,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323727518] [2020-12-22 10:04:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:37,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323727518] [2020-12-22 10:04:37,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:37,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:37,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824964135] [2020-12-22 10:04:37,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:37,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:37,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:37,635 INFO L87 Difference]: Start difference. First operand 30003 states and 42619 transitions. Second operand 3 states. [2020-12-22 10:04:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:38,857 INFO L93 Difference]: Finished difference Result 44231 states and 62673 transitions. [2020-12-22 10:04:38,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:38,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:38,876 INFO L225 Difference]: With dead ends: 44231 [2020-12-22 10:04:38,877 INFO L226 Difference]: Without dead ends: 15781 [2020-12-22 10:04:38,885 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 10:04:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15781 states. [2020-12-22 10:04:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15781 to 15779. [2020-12-22 10:04:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15779 states. [2020-12-22 10:04:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15779 states to 15779 states and 22395 transitions. [2020-12-22 10:04:39,967 INFO L78 Accepts]: Start accepts. Automaton has 15779 states and 22395 transitions. Word has length 113 [2020-12-22 10:04:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:39,967 INFO L481 AbstractCegarLoop]: Abstraction has 15779 states and 22395 transitions. [2020-12-22 10:04:39,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 15779 states and 22395 transitions. [2020-12-22 10:04:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:39,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:39,970 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:04:39,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 10:04:39,970 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:39,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1498655857, now seen corresponding path program 1 times [2020-12-22 10:04:39,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:39,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564252138] [2020-12-22 10:04:39,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:40,034 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 10:04:40,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564252138] [2020-12-22 10:04:40,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:04:40,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:04:40,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431053682] [2020-12-22 10:04:40,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:04:40,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:04:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:04:40,036 INFO L87 Difference]: Start difference. First operand 15779 states and 22395 transitions. Second operand 3 states. [2020-12-22 10:04:40,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:40,555 INFO L93 Difference]: Finished difference Result 22895 states and 32337 transitions. [2020-12-22 10:04:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:04:40,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2020-12-22 10:04:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:40,565 INFO L225 Difference]: With dead ends: 22895 [2020-12-22 10:04:40,565 INFO L226 Difference]: Without dead ends: 8669 [2020-12-22 10:04:40,574 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 10:04:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8669 states. [2020-12-22 10:04:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8669 to 8667. [2020-12-22 10:04:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8667 states. [2020-12-22 10:04:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 12369 transitions. [2020-12-22 10:04:41,254 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 12369 transitions. Word has length 113 [2020-12-22 10:04:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:41,254 INFO L481 AbstractCegarLoop]: Abstraction has 8667 states and 12369 transitions. [2020-12-22 10:04:41,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:04:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 12369 transitions. [2020-12-22 10:04:41,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 10:04:41,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:41,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:04:41,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 10:04:41,258 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:41,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:41,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1585774651, now seen corresponding path program 1 times [2020-12-22 10:04:41,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:41,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589069851] [2020-12-22 10:04:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589069851] [2020-12-22 10:04:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602064959] [2020-12-22 10:04:41,668 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 10:04:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:41,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:04:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:04:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 10:04:42,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:04:42,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 10:04:42,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131393044] [2020-12-22 10:04:42,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:04:42,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:04:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:04:42,216 INFO L87 Difference]: Start difference. First operand 8667 states and 12369 transitions. Second operand 21 states. [2020-12-22 10:04:46,021 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:04:46,762 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-12-22 10:04:47,072 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 10:04:50,942 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-12-22 10:04:52,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:04:52,294 INFO L93 Difference]: Finished difference Result 56546 states and 77674 transitions. [2020-12-22 10:04:52,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 10:04:52,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 113 [2020-12-22 10:04:52,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:04:52,434 INFO L225 Difference]: With dead ends: 56546 [2020-12-22 10:04:52,434 INFO L226 Difference]: Without dead ends: 49432 [2020-12-22 10:04:52,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3479 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1672, Invalid=8228, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 10:04:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49432 states. [2020-12-22 10:04:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49432 to 31687. [2020-12-22 10:04:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31687 states. [2020-12-22 10:04:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31687 states to 31687 states and 43537 transitions. [2020-12-22 10:04:55,624 INFO L78 Accepts]: Start accepts. Automaton has 31687 states and 43537 transitions. Word has length 113 [2020-12-22 10:04:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:04:55,624 INFO L481 AbstractCegarLoop]: Abstraction has 31687 states and 43537 transitions. [2020-12-22 10:04:55,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:04:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 31687 states and 43537 transitions. [2020-12-22 10:04:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:04:55,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:04:55,630 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, 1, 1, 1, 1, 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 10:04:55,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:04:55,844 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:04:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:04:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash -409173495, now seen corresponding path program 1 times [2020-12-22 10:04:55,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:04:55,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264452741] [2020-12-22 10:04:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:04:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:56,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264452741] [2020-12-22 10:04:56,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649427986] [2020-12-22 10:04:56,142 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 10:04:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:04:56,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:04:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:04:56,779 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:04:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:04:57,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:04:57,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-22 10:04:57,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516832505] [2020-12-22 10:04:57,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:04:57,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:04:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:04:57,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:04:57,147 INFO L87 Difference]: Start difference. First operand 31687 states and 43537 transitions. Second operand 18 states. [2020-12-22 10:04:57,283 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:04:59,686 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:04:59,820 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:00,174 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:00,424 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 10:05:00,556 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:02,098 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:02,602 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:05:02,766 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:05:02,905 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:03,406 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:05:03,545 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:05,456 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:05,706 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:05,862 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:08,221 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:08,601 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:08,768 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-12-22 10:05:09,027 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-12-22 10:05:09,683 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 10:05:09,941 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:10,121 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 10:05:10,630 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-22 10:05:10,974 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-12-22 10:05:14,856 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-22 10:05:14,993 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 10:05:15,196 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-22 10:05:15,453 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:16,393 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-12-22 10:05:17,013 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-12-22 10:05:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:05:46,687 INFO L93 Difference]: Finished difference Result 390457 states and 527121 transitions. [2020-12-22 10:05:46,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 10:05:46,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2020-12-22 10:05:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:05:47,470 INFO L225 Difference]: With dead ends: 390457 [2020-12-22 10:05:47,470 INFO L226 Difference]: Without dead ends: 360323 [2020-12-22 10:05:47,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6383 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2552, Invalid=14478, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 10:05:47,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360323 states. [2020-12-22 10:06:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360323 to 137964. [2020-12-22 10:06:03,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137964 states. [2020-12-22 10:06:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137964 states to 137964 states and 185063 transitions. [2020-12-22 10:06:03,926 INFO L78 Accepts]: Start accepts. Automaton has 137964 states and 185063 transitions. Word has length 114 [2020-12-22 10:06:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:03,926 INFO L481 AbstractCegarLoop]: Abstraction has 137964 states and 185063 transitions. [2020-12-22 10:06:03,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:06:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 137964 states and 185063 transitions. [2020-12-22 10:06:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:03,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:03,931 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 10:06:04,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:06:04,133 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:04,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1061210015, now seen corresponding path program 1 times [2020-12-22 10:06:04,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:04,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413427403] [2020-12-22 10:06:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:04,503 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 10:06:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413427403] [2020-12-22 10:06:04,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:04,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:06:04,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7915176] [2020-12-22 10:06:04,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 10:06:04,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 10:06:04,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 10:06:04,507 INFO L87 Difference]: Start difference. First operand 137964 states and 185063 transitions. Second operand 3 states. [2020-12-22 10:06:10,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:10,309 INFO L93 Difference]: Finished difference Result 190056 states and 254198 transitions. [2020-12-22 10:06:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 10:06:10,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 10:06:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:10,370 INFO L225 Difference]: With dead ends: 190056 [2020-12-22 10:06:10,370 INFO L226 Difference]: Without dead ends: 53645 [2020-12-22 10:06:10,424 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 10:06:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53645 states. [2020-12-22 10:06:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53645 to 50169. [2020-12-22 10:06:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50169 states. [2020-12-22 10:06:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50169 states to 50169 states and 66645 transitions. [2020-12-22 10:06:15,881 INFO L78 Accepts]: Start accepts. Automaton has 50169 states and 66645 transitions. Word has length 114 [2020-12-22 10:06:15,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:15,882 INFO L481 AbstractCegarLoop]: Abstraction has 50169 states and 66645 transitions. [2020-12-22 10:06:15,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 10:06:15,882 INFO L276 IsEmpty]: Start isEmpty. Operand 50169 states and 66645 transitions. [2020-12-22 10:06:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:15,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:15,885 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, 1, 1, 1, 1, 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 10:06:15,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 10:06:15,885 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash 707187499, now seen corresponding path program 1 times [2020-12-22 10:06:15,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:15,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028886452] [2020-12-22 10:06:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 10:06:15,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028886452] [2020-12-22 10:06:15,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:15,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:06:15,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987807981] [2020-12-22 10:06:15,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:06:15,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:06:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:06:15,995 INFO L87 Difference]: Start difference. First operand 50169 states and 66645 transitions. Second operand 6 states. [2020-12-22 10:06:21,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:21,053 INFO L93 Difference]: Finished difference Result 95640 states and 126869 transitions. [2020-12-22 10:06:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:06:21,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:06:21,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:21,096 INFO L225 Difference]: With dead ends: 95640 [2020-12-22 10:06:21,097 INFO L226 Difference]: Without dead ends: 47141 [2020-12-22 10:06:21,114 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 10:06:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47141 states. [2020-12-22 10:06:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47141 to 47141. [2020-12-22 10:06:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47141 states. [2020-12-22 10:06:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47141 states to 47141 states and 62226 transitions. [2020-12-22 10:06:26,221 INFO L78 Accepts]: Start accepts. Automaton has 47141 states and 62226 transitions. Word has length 114 [2020-12-22 10:06:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:06:26,221 INFO L481 AbstractCegarLoop]: Abstraction has 47141 states and 62226 transitions. [2020-12-22 10:06:26,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:06:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 47141 states and 62226 transitions. [2020-12-22 10:06:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 10:06:26,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:06:26,224 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, 1, 1, 1, 1, 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 10:06:26,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 10:06:26,224 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:06:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:06:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash 125621387, now seen corresponding path program 1 times [2020-12-22 10:06:26,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:06:26,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128565233] [2020-12-22 10:06:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:06:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:06:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 10:06:26,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128565233] [2020-12-22 10:06:26,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:06:26,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 10:06:26,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057092146] [2020-12-22 10:06:26,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:06:26,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:06:26,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:06:26,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:06:26,322 INFO L87 Difference]: Start difference. First operand 47141 states and 62226 transitions. Second operand 6 states. [2020-12-22 10:06:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:06:30,589 INFO L93 Difference]: Finished difference Result 81843 states and 107719 transitions. [2020-12-22 10:06:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:06:30,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-12-22 10:06:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:06:30,626 INFO L225 Difference]: With dead ends: 81843 [2020-12-22 10:06:30,626 INFO L226 Difference]: Without dead ends: 36452 [2020-12-22 10:06:30,645 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 10:06:30,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36452 states.