/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.3.ufo.BOUNDED-6.pals+Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:37:12,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:37:12,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:37:13,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:37:13,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:37:13,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:37:13,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:37:13,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:37:13,032 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:37:13,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:37:13,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:37:13,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:37:13,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:37:13,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:37:13,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:37:13,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:37:13,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:37:13,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:37:13,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:37:13,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:37:13,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:37:13,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:37:13,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:37:13,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:37:13,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 09:37:13,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 09:37:13,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 09:37:13,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 09:37:13,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 09:37:13,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 09:37:13,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:37:13,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:37:13,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:37:13,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:37:13,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:37:13,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:37:13,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:37:13,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:37:13,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:37:13,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:37:13,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:37:13,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:37:13,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:37:13,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:37:13,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:37:13,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:37:13,118 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:37:13,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:37:13,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:37:13,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:37:13,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:37:13,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:37:13,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:37:13,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:37:13,119 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:37:13,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:37:13,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:37:13,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:37:13,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:37:13,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:37:13,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:37:13,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:37:13,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:37:13,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:37:13,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:37:13,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:37:13,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:37:13,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:37:13,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:37:13,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:37:13,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:37:13,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:37:13,695 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:37:13,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2020-12-22 09:37:13,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324ceabf4/2fd02d9819f04682a35840f459395f74/FLAG71e7a4b6e [2020-12-22 09:37:14,787 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:37:14,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2020-12-22 09:37:14,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324ceabf4/2fd02d9819f04682a35840f459395f74/FLAG71e7a4b6e [2020-12-22 09:37:15,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/324ceabf4/2fd02d9819f04682a35840f459395f74 [2020-12-22 09:37:15,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:37:15,271 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:37:15,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:15,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:37:15,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:37:15,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:15" (1/1) ... [2020-12-22 09:37:15,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb121cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:15, skipping insertion in model container [2020-12-22 09:37:15,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:37:15" (1/1) ... [2020-12-22 09:37:15,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:37:15,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:37:15,853 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.3.ufo.BOUNDED-6.pals+Problem12_label09.c[6412,6425] [2020-12-22 09:37:15,973 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.3.ufo.BOUNDED-6.pals+Problem12_label09.c[13917,13930] [2020-12-22 09:37:17,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:17,088 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:37:17,163 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.3.ufo.BOUNDED-6.pals+Problem12_label09.c[6412,6425] [2020-12-22 09:37:17,185 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.3.ufo.BOUNDED-6.pals+Problem12_label09.c[13917,13930] [2020-12-22 09:37:17,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:37:17,907 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:37:17,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17 WrapperNode [2020-12-22 09:37:17,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:37:17,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:17,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:37:17,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:37:17,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:37:18,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:37:18,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:37:18,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:37:18,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:18,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:19,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:19,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (1/1) ... [2020-12-22 09:37:19,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:37:19,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:37:19,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:37:19,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:37:19,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (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 09:37:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:37:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:37:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:37:19,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:37:26,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:37:26,037 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2020-12-22 09:37:26,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:26 BoogieIcfgContainer [2020-12-22 09:37:26,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:37:26,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:37:26,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:37:26,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:37:26,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:37:15" (1/3) ... [2020-12-22 09:37:26,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709a5592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:26, skipping insertion in model container [2020-12-22 09:37:26,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:37:17" (2/3) ... [2020-12-22 09:37:26,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709a5592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:37:26, skipping insertion in model container [2020-12-22 09:37:26,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:37:26" (3/3) ... [2020-12-22 09:37:26,051 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label09.c [2020-12-22 09:37:26,058 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:37:26,075 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:37:26,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:37:26,133 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:37:26,133 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:37:26,133 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:37:26,133 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:37:26,133 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:37:26,134 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:37:26,134 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:37:26,134 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:37:26,169 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states. [2020-12-22 09:37:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:37:26,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:26,178 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] [2020-12-22 09:37:26,179 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2020-12-22 09:37:26,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:26,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748123607] [2020-12-22 09:37:26,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:26,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748123607] [2020-12-22 09:37:26,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:26,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:37:26,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276134014] [2020-12-22 09:37:26,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 09:37:26,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:26,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 09:37:26,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 09:37:26,450 INFO L87 Difference]: Start difference. First operand 878 states. Second operand 2 states. [2020-12-22 09:37:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:26,538 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2020-12-22 09:37:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 09:37:26,540 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 26 [2020-12-22 09:37:26,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:26,567 INFO L225 Difference]: With dead ends: 1734 [2020-12-22 09:37:26,568 INFO L226 Difference]: Without dead ends: 812 [2020-12-22 09:37:26,580 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 09:37:26,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-12-22 09:37:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2020-12-22 09:37:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:37:26,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2020-12-22 09:37:26,726 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2020-12-22 09:37:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:26,726 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2020-12-22 09:37:26,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 09:37:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2020-12-22 09:37:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 09:37:26,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:26,728 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] [2020-12-22 09:37:26,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:37:26,729 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:26,730 INFO L82 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2020-12-22 09:37:26,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:26,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989340920] [2020-12-22 09:37:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:26,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989340920] [2020-12-22 09:37:26,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:26,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:26,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070723357] [2020-12-22 09:37:26,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:26,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:26,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:26,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:26,876 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand 5 states. [2020-12-22 09:37:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:27,102 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2020-12-22 09:37:27,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:37:27,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-22 09:37:27,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:27,110 INFO L225 Difference]: With dead ends: 888 [2020-12-22 09:37:27,110 INFO L226 Difference]: Without dead ends: 848 [2020-12-22 09:37:27,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-12-22 09:37:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2020-12-22 09:37:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 09:37:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2020-12-22 09:37:27,141 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2020-12-22 09:37:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:27,142 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2020-12-22 09:37:27,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2020-12-22 09:37:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:27,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:27,144 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] [2020-12-22 09:37:27,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:37:27,144 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:27,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2020-12-22 09:37:27,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:27,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426531329] [2020-12-22 09:37:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:27,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426531329] [2020-12-22 09:37:27,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:27,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:27,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103352662] [2020-12-22 09:37:27,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:27,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:27,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:27,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:27,313 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand 3 states. [2020-12-22 09:37:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:27,369 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2020-12-22 09:37:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:27,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 09:37:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:27,375 INFO L225 Difference]: With dead ends: 878 [2020-12-22 09:37:27,376 INFO L226 Difference]: Without dead ends: 842 [2020-12-22 09:37:27,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:27,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2020-12-22 09:37:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2020-12-22 09:37:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 840 states. [2020-12-22 09:37:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2020-12-22 09:37:27,419 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2020-12-22 09:37:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:27,420 INFO L481 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2020-12-22 09:37:27,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2020-12-22 09:37:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 09:37:27,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:27,425 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] [2020-12-22 09:37:27,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:37:27,425 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:27,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2020-12-22 09:37:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:27,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926267345] [2020-12-22 09:37:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:27,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926267345] [2020-12-22 09:37:27,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:27,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:27,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151199657] [2020-12-22 09:37:27,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:27,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:27,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:27,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:27,629 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand 5 states. [2020-12-22 09:37:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:27,791 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2020-12-22 09:37:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:27,792 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-22 09:37:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:27,801 INFO L225 Difference]: With dead ends: 1224 [2020-12-22 09:37:27,801 INFO L226 Difference]: Without dead ends: 1160 [2020-12-22 09:37:27,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2020-12-22 09:37:27,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2020-12-22 09:37:27,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-12-22 09:37:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2020-12-22 09:37:27,846 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2020-12-22 09:37:27,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:27,847 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2020-12-22 09:37:27,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2020-12-22 09:37:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:27,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:27,849 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] [2020-12-22 09:37:27,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:37:27,850 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2020-12-22 09:37:27,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:27,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416528642] [2020-12-22 09:37:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:27,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416528642] [2020-12-22 09:37:27,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:27,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:27,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877969570] [2020-12-22 09:37:27,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:27,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:27,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:27,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:27,919 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand 3 states. [2020-12-22 09:37:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:28,039 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2020-12-22 09:37:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:28,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:28,047 INFO L225 Difference]: With dead ends: 1089 [2020-12-22 09:37:28,047 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:37:28,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:37:28,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:37:28,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:37:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2020-12-22 09:37:28,089 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2020-12-22 09:37:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:28,090 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2020-12-22 09:37:28,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2020-12-22 09:37:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:28,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:28,091 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] [2020-12-22 09:37:28,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:37:28,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2020-12-22 09:37:28,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:28,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086602359] [2020-12-22 09:37:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:28,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086602359] [2020-12-22 09:37:28,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:28,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:28,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611902971] [2020-12-22 09:37:28,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:28,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:28,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:28,286 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand 5 states. [2020-12-22 09:37:28,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:28,425 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2020-12-22 09:37:28,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:28,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 09:37:28,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:28,433 INFO L225 Difference]: With dead ends: 1146 [2020-12-22 09:37:28,433 INFO L226 Difference]: Without dead ends: 963 [2020-12-22 09:37:28,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:37:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-12-22 09:37:28,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2020-12-22 09:37:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-12-22 09:37:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2020-12-22 09:37:28,474 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2020-12-22 09:37:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:28,474 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2020-12-22 09:37:28,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:28,475 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2020-12-22 09:37:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:28,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:28,478 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] [2020-12-22 09:37:28,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:37:28,483 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2020-12-22 09:37:28,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:28,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994134093] [2020-12-22 09:37:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:28,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994134093] [2020-12-22 09:37:28,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:28,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:28,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087826922] [2020-12-22 09:37:28,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:28,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:28,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:28,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:28,599 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand 3 states. [2020-12-22 09:37:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:28,655 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2020-12-22 09:37:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:28,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:28,665 INFO L225 Difference]: With dead ends: 1291 [2020-12-22 09:37:28,665 INFO L226 Difference]: Without dead ends: 1108 [2020-12-22 09:37:28,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2020-12-22 09:37:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2020-12-22 09:37:28,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1106 states. [2020-12-22 09:37:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2020-12-22 09:37:28,721 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2020-12-22 09:37:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:28,723 INFO L481 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2020-12-22 09:37:28,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2020-12-22 09:37:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 09:37:28,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:28,724 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] [2020-12-22 09:37:28,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:37:28,725 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2020-12-22 09:37:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:28,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64164562] [2020-12-22 09:37:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:28,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64164562] [2020-12-22 09:37:28,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:28,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:28,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873403059] [2020-12-22 09:37:28,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:28,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:28,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:28,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:28,787 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand 3 states. [2020-12-22 09:37:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:28,854 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2020-12-22 09:37:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:28,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 09:37:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:28,864 INFO L225 Difference]: With dead ends: 1690 [2020-12-22 09:37:28,865 INFO L226 Difference]: Without dead ends: 1362 [2020-12-22 09:37:28,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2020-12-22 09:37:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2020-12-22 09:37:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2020-12-22 09:37:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2020-12-22 09:37:28,930 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2020-12-22 09:37:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:28,931 INFO L481 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2020-12-22 09:37:28,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2020-12-22 09:37:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 09:37:28,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:28,932 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] [2020-12-22 09:37:28,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:37:28,932 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:28,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2020-12-22 09:37:28,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:28,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618414792] [2020-12-22 09:37:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:29,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618414792] [2020-12-22 09:37:29,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:29,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:29,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981640624] [2020-12-22 09:37:29,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:29,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:29,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:29,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:29,068 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand 5 states. [2020-12-22 09:37:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:29,221 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2020-12-22 09:37:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:37:29,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 09:37:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:29,234 INFO L225 Difference]: With dead ends: 1883 [2020-12-22 09:37:29,234 INFO L226 Difference]: Without dead ends: 1881 [2020-12-22 09:37:29,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:37:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-12-22 09:37:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2020-12-22 09:37:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1408 states. [2020-12-22 09:37:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2020-12-22 09:37:29,323 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2020-12-22 09:37:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:29,328 INFO L481 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2020-12-22 09:37:29,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:29,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2020-12-22 09:37:29,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:29,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:29,330 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] [2020-12-22 09:37:29,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:37:29,330 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:29,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:29,331 INFO L82 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2020-12-22 09:37:29,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:29,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931902271] [2020-12-22 09:37:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:37:29,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931902271] [2020-12-22 09:37:29,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:29,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:29,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792251672] [2020-12-22 09:37:29,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:29,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:29,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:29,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:29,472 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand 5 states. [2020-12-22 09:37:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:29,703 INFO L93 Difference]: Finished difference Result 3436 states and 5200 transitions. [2020-12-22 09:37:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:29,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:29,720 INFO L225 Difference]: With dead ends: 3436 [2020-12-22 09:37:29,720 INFO L226 Difference]: Without dead ends: 2806 [2020-12-22 09:37:29,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2020-12-22 09:37:29,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2036. [2020-12-22 09:37:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2036 states. [2020-12-22 09:37:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 3228 transitions. [2020-12-22 09:37:29,854 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 3228 transitions. Word has length 64 [2020-12-22 09:37:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:29,855 INFO L481 AbstractCegarLoop]: Abstraction has 2036 states and 3228 transitions. [2020-12-22 09:37:29,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 3228 transitions. [2020-12-22 09:37:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:29,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:29,857 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] [2020-12-22 09:37:29,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:37:29,857 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2020-12-22 09:37:29,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:29,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629918410] [2020-12-22 09:37:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:37:29,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629918410] [2020-12-22 09:37:29,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:29,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:29,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10330618] [2020-12-22 09:37:29,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:29,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:29,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:29,954 INFO L87 Difference]: Start difference. First operand 2036 states and 3228 transitions. Second operand 5 states. [2020-12-22 09:37:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:30,220 INFO L93 Difference]: Finished difference Result 4064 states and 6076 transitions. [2020-12-22 09:37:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:30,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:30,240 INFO L225 Difference]: With dead ends: 4064 [2020-12-22 09:37:30,240 INFO L226 Difference]: Without dead ends: 3434 [2020-12-22 09:37:30,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2020-12-22 09:37:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2980. [2020-12-22 09:37:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2980 states. [2020-12-22 09:37:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 4532 transitions. [2020-12-22 09:37:30,417 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 4532 transitions. Word has length 64 [2020-12-22 09:37:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:30,418 INFO L481 AbstractCegarLoop]: Abstraction has 2980 states and 4532 transitions. [2020-12-22 09:37:30,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 4532 transitions. [2020-12-22 09:37:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:37:30,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:30,420 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] [2020-12-22 09:37:30,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:37:30,422 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:30,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:30,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2020-12-22 09:37:30,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:30,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989224809] [2020-12-22 09:37:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:30,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989224809] [2020-12-22 09:37:30,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:30,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:30,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791234662] [2020-12-22 09:37:30,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:37:30,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:30,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:37:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:37:30,510 INFO L87 Difference]: Start difference. First operand 2980 states and 4532 transitions. Second operand 5 states. [2020-12-22 09:37:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:30,776 INFO L93 Difference]: Finished difference Result 4332 states and 6456 transitions. [2020-12-22 09:37:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:37:30,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-22 09:37:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:30,797 INFO L225 Difference]: With dead ends: 4332 [2020-12-22 09:37:30,798 INFO L226 Difference]: Without dead ends: 3882 [2020-12-22 09:37:30,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:37:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2020-12-22 09:37:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3428. [2020-12-22 09:37:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3428 states. [2020-12-22 09:37:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 5164 transitions. [2020-12-22 09:37:31,011 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 5164 transitions. Word has length 64 [2020-12-22 09:37:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,011 INFO L481 AbstractCegarLoop]: Abstraction has 3428 states and 5164 transitions. [2020-12-22 09:37:31,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:37:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 5164 transitions. [2020-12-22 09:37:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:31,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,013 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] [2020-12-22 09:37:31,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:37:31,014 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2020-12-22 09:37:31,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313064107] [2020-12-22 09:37:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:31,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313064107] [2020-12-22 09:37:31,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:31,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:31,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953178511] [2020-12-22 09:37:31,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:31,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:31,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:31,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:31,075 INFO L87 Difference]: Start difference. First operand 3428 states and 5164 transitions. Second operand 3 states. [2020-12-22 09:37:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:31,311 INFO L93 Difference]: Finished difference Result 6080 states and 8866 transitions. [2020-12-22 09:37:31,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:31,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:31,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,329 INFO L225 Difference]: With dead ends: 6080 [2020-12-22 09:37:31,329 INFO L226 Difference]: Without dead ends: 3430 [2020-12-22 09:37:31,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:31,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2020-12-22 09:37:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 3428. [2020-12-22 09:37:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3428 states. [2020-12-22 09:37:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 5114 transitions. [2020-12-22 09:37:31,528 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 5114 transitions. Word has length 65 [2020-12-22 09:37:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,529 INFO L481 AbstractCegarLoop]: Abstraction has 3428 states and 5114 transitions. [2020-12-22 09:37:31,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 5114 transitions. [2020-12-22 09:37:31,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:31,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,531 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] [2020-12-22 09:37:31,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:37:31,531 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,532 INFO L82 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2020-12-22 09:37:31,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264225241] [2020-12-22 09:37:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:31,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264225241] [2020-12-22 09:37:31,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:31,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29735605] [2020-12-22 09:37:31,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:31,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:31,589 INFO L87 Difference]: Start difference. First operand 3428 states and 5114 transitions. Second operand 3 states. [2020-12-22 09:37:31,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:31,700 INFO L93 Difference]: Finished difference Result 4756 states and 6941 transitions. [2020-12-22 09:37:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:31,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 09:37:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:31,710 INFO L225 Difference]: With dead ends: 4756 [2020-12-22 09:37:31,711 INFO L226 Difference]: Without dead ends: 2106 [2020-12-22 09:37:31,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2020-12-22 09:37:31,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2104. [2020-12-22 09:37:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2104 states. [2020-12-22 09:37:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3264 transitions. [2020-12-22 09:37:31,825 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3264 transitions. Word has length 65 [2020-12-22 09:37:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:31,826 INFO L481 AbstractCegarLoop]: Abstraction has 2104 states and 3264 transitions. [2020-12-22 09:37:31,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3264 transitions. [2020-12-22 09:37:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 09:37:31,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:31,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:31,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:37:31,828 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2020-12-22 09:37:31,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:31,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784772670] [2020-12-22 09:37:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:31,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:31,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784772670] [2020-12-22 09:37:31,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49760131] [2020-12-22 09:37:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:37:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:32,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 09:37:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:37:32,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:32,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 10 [2020-12-22 09:37:32,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259444431] [2020-12-22 09:37:32,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:37:32,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:32,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:37:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:37:32,291 INFO L87 Difference]: Start difference. First operand 2104 states and 3264 transitions. Second operand 10 states. [2020-12-22 09:37:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:32,648 INFO L93 Difference]: Finished difference Result 3953 states and 5801 transitions. [2020-12-22 09:37:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:37:32,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-12-22 09:37:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:32,658 INFO L225 Difference]: With dead ends: 3953 [2020-12-22 09:37:32,658 INFO L226 Difference]: Without dead ends: 2943 [2020-12-22 09:37:32,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:37:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2943 states. [2020-12-22 09:37:32,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2943 to 2910. [2020-12-22 09:37:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2910 states. [2020-12-22 09:37:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4320 transitions. [2020-12-22 09:37:32,855 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4320 transitions. Word has length 65 [2020-12-22 09:37:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:32,855 INFO L481 AbstractCegarLoop]: Abstraction has 2910 states and 4320 transitions. [2020-12-22 09:37:32,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:37:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4320 transitions. [2020-12-22 09:37:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:32,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:32,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:33,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 09:37:33,072 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:33,073 INFO L82 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2020-12-22 09:37:33,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:33,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064912118] [2020-12-22 09:37:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:33,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064912118] [2020-12-22 09:37:33,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387201868] [2020-12-22 09:37:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:37:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 09:37:33,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:33,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:34,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:34,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:34,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293319946] [2020-12-22 09:37:34,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:34,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:34,095 INFO L87 Difference]: Start difference. First operand 2910 states and 4320 transitions. Second operand 17 states. [2020-12-22 09:37:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:36,408 INFO L93 Difference]: Finished difference Result 9929 states and 13590 transitions. [2020-12-22 09:37:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:37:36,408 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:37:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:36,430 INFO L225 Difference]: With dead ends: 9929 [2020-12-22 09:37:36,430 INFO L226 Difference]: Without dead ends: 8438 [2020-12-22 09:37:36,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 09:37:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8438 states. [2020-12-22 09:37:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8438 to 5385. [2020-12-22 09:37:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5385 states. [2020-12-22 09:37:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5385 states to 5385 states and 7598 transitions. [2020-12-22 09:37:36,877 INFO L78 Accepts]: Start accepts. Automaton has 5385 states and 7598 transitions. Word has length 66 [2020-12-22 09:37:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:36,878 INFO L481 AbstractCegarLoop]: Abstraction has 5385 states and 7598 transitions. [2020-12-22 09:37:36,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 5385 states and 7598 transitions. [2020-12-22 09:37:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:36,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:36,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:37,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 09:37:37,094 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:37,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1910012548, now seen corresponding path program 1 times [2020-12-22 09:37:37,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:37,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044104314] [2020-12-22 09:37:37,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:37,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044104314] [2020-12-22 09:37:37,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751646986] [2020-12-22 09:37:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:37:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:37,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:37:37,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:37,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:37,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:37,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:37,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836015118] [2020-12-22 09:37:37,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:37,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:37,922 INFO L87 Difference]: Start difference. First operand 5385 states and 7598 transitions. Second operand 17 states. [2020-12-22 09:37:38,618 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-12-22 09:37:41,106 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:37:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:43,562 INFO L93 Difference]: Finished difference Result 28499 states and 38170 transitions. [2020-12-22 09:37:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 09:37:43,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:37:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:43,625 INFO L225 Difference]: With dead ends: 28499 [2020-12-22 09:37:43,625 INFO L226 Difference]: Without dead ends: 23892 [2020-12-22 09:37:43,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:37:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23892 states. [2020-12-22 09:37:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23892 to 10884. [2020-12-22 09:37:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10884 states. [2020-12-22 09:37:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10884 states to 10884 states and 14725 transitions. [2020-12-22 09:37:44,738 INFO L78 Accepts]: Start accepts. Automaton has 10884 states and 14725 transitions. Word has length 66 [2020-12-22 09:37:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:44,738 INFO L481 AbstractCegarLoop]: Abstraction has 10884 states and 14725 transitions. [2020-12-22 09:37:44,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 10884 states and 14725 transitions. [2020-12-22 09:37:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:44,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:44,740 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:44,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 09:37:44,956 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2020-12-22 09:37:44,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:44,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280333482] [2020-12-22 09:37:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:45,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280333482] [2020-12-22 09:37:45,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115523142] [2020-12-22 09:37:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:37:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:37:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:37:45,583 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:37:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:45,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:37:45,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:37:45,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241555238] [2020-12-22 09:37:45,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:37:45,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:45,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:37:45,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:37:45,924 INFO L87 Difference]: Start difference. First operand 10884 states and 14725 transitions. Second operand 17 states. [2020-12-22 09:37:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:50,530 INFO L93 Difference]: Finished difference Result 53678 states and 70061 transitions. [2020-12-22 09:37:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 09:37:50,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-22 09:37:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:50,638 INFO L225 Difference]: With dead ends: 53678 [2020-12-22 09:37:50,638 INFO L226 Difference]: Without dead ends: 43572 [2020-12-22 09:37:50,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:37:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43572 states. [2020-12-22 09:37:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43572 to 28320. [2020-12-22 09:37:53,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28320 states. [2020-12-22 09:37:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28320 states to 28320 states and 37153 transitions. [2020-12-22 09:37:53,732 INFO L78 Accepts]: Start accepts. Automaton has 28320 states and 37153 transitions. Word has length 66 [2020-12-22 09:37:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:53,733 INFO L481 AbstractCegarLoop]: Abstraction has 28320 states and 37153 transitions. [2020-12-22 09:37:53,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:37:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 28320 states and 37153 transitions. [2020-12-22 09:37:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:53,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:53,736 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] [2020-12-22 09:37:53,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 09:37:53,945 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:53,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:53,946 INFO L82 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2020-12-22 09:37:53,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:53,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662983546] [2020-12-22 09:37:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:37:54,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662983546] [2020-12-22 09:37:54,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:54,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:37:54,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748000757] [2020-12-22 09:37:54,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:37:54,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:54,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:37:54,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:54,007 INFO L87 Difference]: Start difference. First operand 28320 states and 37153 transitions. Second operand 3 states. [2020-12-22 09:37:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:55,000 INFO L93 Difference]: Finished difference Result 40316 states and 52683 transitions. [2020-12-22 09:37:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:37:55,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:37:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:55,036 INFO L225 Difference]: With dead ends: 40316 [2020-12-22 09:37:55,036 INFO L226 Difference]: Without dead ends: 12774 [2020-12-22 09:37:55,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:37:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12774 states. [2020-12-22 09:37:56,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12774 to 11722. [2020-12-22 09:37:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11722 states. [2020-12-22 09:37:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 15442 transitions. [2020-12-22 09:37:56,344 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 15442 transitions. Word has length 66 [2020-12-22 09:37:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:56,344 INFO L481 AbstractCegarLoop]: Abstraction has 11722 states and 15442 transitions. [2020-12-22 09:37:56,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:37:56,344 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 15442 transitions. [2020-12-22 09:37:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:56,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:56,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:56,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:37:56,347 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2020-12-22 09:37:56,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:56,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408291780] [2020-12-22 09:37:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:37:56,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408291780] [2020-12-22 09:37:56,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:56,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:56,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615786854] [2020-12-22 09:37:56,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:37:56,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:37:56,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:37:56,419 INFO L87 Difference]: Start difference. First operand 11722 states and 15442 transitions. Second operand 6 states. [2020-12-22 09:37:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:57,379 INFO L93 Difference]: Finished difference Result 20787 states and 27089 transitions. [2020-12-22 09:37:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:37:57,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:37:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:57,407 INFO L225 Difference]: With dead ends: 20787 [2020-12-22 09:37:57,407 INFO L226 Difference]: Without dead ends: 9920 [2020-12-22 09:37:57,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:37:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9920 states. [2020-12-22 09:37:58,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9920 to 9920. [2020-12-22 09:37:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9920 states. [2020-12-22 09:37:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9920 states to 9920 states and 12920 transitions. [2020-12-22 09:37:58,294 INFO L78 Accepts]: Start accepts. Automaton has 9920 states and 12920 transitions. Word has length 66 [2020-12-22 09:37:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:37:58,294 INFO L481 AbstractCegarLoop]: Abstraction has 9920 states and 12920 transitions. [2020-12-22 09:37:58,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:37:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9920 states and 12920 transitions. [2020-12-22 09:37:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:37:58,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:37:58,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:37:58,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:37:58,297 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:37:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:37:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2020-12-22 09:37:58,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:37:58,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714588022] [2020-12-22 09:37:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:37:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:37:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 09:37:58,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714588022] [2020-12-22 09:37:58,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:37:58,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:37:58,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524342333] [2020-12-22 09:37:58,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:37:58,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:37:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:37:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:37:58,363 INFO L87 Difference]: Start difference. First operand 9920 states and 12920 transitions. Second operand 6 states. [2020-12-22 09:37:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:37:59,599 INFO L93 Difference]: Finished difference Result 16697 states and 21456 transitions. [2020-12-22 09:37:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:37:59,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:37:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:37:59,618 INFO L225 Difference]: With dead ends: 16697 [2020-12-22 09:37:59,618 INFO L226 Difference]: Without dead ends: 7668 [2020-12-22 09:37:59,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:37:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7668 states. [2020-12-22 09:38:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7668 to 7668. [2020-12-22 09:38:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7668 states. [2020-12-22 09:38:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7668 states to 7668 states and 9952 transitions. [2020-12-22 09:38:00,545 INFO L78 Accepts]: Start accepts. Automaton has 7668 states and 9952 transitions. Word has length 66 [2020-12-22 09:38:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:00,545 INFO L481 AbstractCegarLoop]: Abstraction has 7668 states and 9952 transitions. [2020-12-22 09:38:00,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7668 states and 9952 transitions. [2020-12-22 09:38:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:38:00,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:00,547 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:00,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:38:00,547 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:00,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2020-12-22 09:38:00,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:00,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862926415] [2020-12-22 09:38:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 09:38:00,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862926415] [2020-12-22 09:38:00,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:00,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:38:00,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004731365] [2020-12-22 09:38:00,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:38:00,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:00,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:38:00,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:38:00,644 INFO L87 Difference]: Start difference. First operand 7668 states and 9952 transitions. Second operand 6 states. [2020-12-22 09:38:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:01,703 INFO L93 Difference]: Finished difference Result 13018 states and 16609 transitions. [2020-12-22 09:38:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:38:01,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-22 09:38:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:01,717 INFO L225 Difference]: With dead ends: 13018 [2020-12-22 09:38:01,717 INFO L226 Difference]: Without dead ends: 6164 [2020-12-22 09:38:01,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:38:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6164 states. [2020-12-22 09:38:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6164 to 6164. [2020-12-22 09:38:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6164 states. [2020-12-22 09:38:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6164 states to 6164 states and 8046 transitions. [2020-12-22 09:38:02,419 INFO L78 Accepts]: Start accepts. Automaton has 6164 states and 8046 transitions. Word has length 66 [2020-12-22 09:38:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:02,419 INFO L481 AbstractCegarLoop]: Abstraction has 6164 states and 8046 transitions. [2020-12-22 09:38:02,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:38:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 6164 states and 8046 transitions. [2020-12-22 09:38:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:02,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:02,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:02,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:38:02,422 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2020-12-22 09:38:02,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:02,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893823831] [2020-12-22 09:38:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:02,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893823831] [2020-12-22 09:38:02,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750348028] [2020-12-22 09:38:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 09:38:03,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:03,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:03,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:03,770 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:03,775 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:38:04,050 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 28 [2020-12-22 09:38:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:04,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:04,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-22 09:38:04,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428893912] [2020-12-22 09:38:04,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 09:38:04,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:04,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 09:38:04,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2020-12-22 09:38:04,295 INFO L87 Difference]: Start difference. First operand 6164 states and 8046 transitions. Second operand 26 states. [2020-12-22 09:38:05,205 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-22 09:38:05,417 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 09:38:05,733 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-12-22 09:38:05,997 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:38:06,264 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:06,543 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:06,834 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-12-22 09:38:07,140 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-12-22 09:38:07,454 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:38:07,683 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:38:07,858 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-22 09:38:08,057 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 09:38:08,586 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-12-22 09:38:09,011 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:38:09,209 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-12-22 09:38:09,533 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-22 09:38:09,847 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-22 09:38:10,163 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 09:38:10,328 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-12-22 09:38:10,758 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-12-22 09:38:11,441 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-12-22 09:38:11,845 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:38:12,194 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:38:12,426 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-12-22 09:38:12,723 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 09:38:12,959 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-12-22 09:38:13,191 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-12-22 09:38:13,476 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:38:13,643 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 09:38:14,046 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-12-22 09:38:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:16,051 INFO L93 Difference]: Finished difference Result 12470 states and 15881 transitions. [2020-12-22 09:38:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-22 09:38:16,052 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 67 [2020-12-22 09:38:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:16,062 INFO L225 Difference]: With dead ends: 12470 [2020-12-22 09:38:16,062 INFO L226 Difference]: Without dead ends: 9655 [2020-12-22 09:38:16,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1298, Invalid=6358, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 09:38:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9655 states. [2020-12-22 09:38:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9655 to 5406. [2020-12-22 09:38:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5406 states. [2020-12-22 09:38:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5406 states to 5406 states and 7161 transitions. [2020-12-22 09:38:16,631 INFO L78 Accepts]: Start accepts. Automaton has 5406 states and 7161 transitions. Word has length 67 [2020-12-22 09:38:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:16,631 INFO L481 AbstractCegarLoop]: Abstraction has 5406 states and 7161 transitions. [2020-12-22 09:38:16,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 09:38:16,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5406 states and 7161 transitions. [2020-12-22 09:38:16,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:16,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:16,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:16,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 09:38:16,833 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:16,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:16,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1641009586, now seen corresponding path program 1 times [2020-12-22 09:38:16,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:16,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952355784] [2020-12-22 09:38:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:17,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:17,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952355784] [2020-12-22 09:38:17,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753818137] [2020-12-22 09:38:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:17,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 09:38:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:17,684 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:38:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:18,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:18,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-12-22 09:38:18,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173147861] [2020-12-22 09:38:18,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 09:38:18,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:18,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 09:38:18,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:38:18,254 INFO L87 Difference]: Start difference. First operand 5406 states and 7161 transitions. Second operand 22 states. [2020-12-22 09:38:18,550 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 21 [2020-12-22 09:38:18,708 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:38:18,877 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-12-22 09:38:19,731 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-12-22 09:38:20,000 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-12-22 09:38:20,168 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-12-22 09:38:20,410 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-22 09:38:21,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:21,176 INFO L93 Difference]: Finished difference Result 8648 states and 11254 transitions. [2020-12-22 09:38:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 09:38:21,176 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-12-22 09:38:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:21,185 INFO L225 Difference]: With dead ends: 8648 [2020-12-22 09:38:21,186 INFO L226 Difference]: Without dead ends: 6462 [2020-12-22 09:38:21,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 09:38:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2020-12-22 09:38:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 4414. [2020-12-22 09:38:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4414 states. [2020-12-22 09:38:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4414 states to 4414 states and 5935 transitions. [2020-12-22 09:38:21,645 INFO L78 Accepts]: Start accepts. Automaton has 4414 states and 5935 transitions. Word has length 67 [2020-12-22 09:38:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:21,646 INFO L481 AbstractCegarLoop]: Abstraction has 4414 states and 5935 transitions. [2020-12-22 09:38:21,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 09:38:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4414 states and 5935 transitions. [2020-12-22 09:38:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:38:21,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:21,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:21,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:21,848 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash 531431905, now seen corresponding path program 1 times [2020-12-22 09:38:21,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:21,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715696680] [2020-12-22 09:38:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:21,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715696680] [2020-12-22 09:38:21,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:38:21,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:38:21,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18014929] [2020-12-22 09:38:21,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:38:21,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:21,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:38:21,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:21,898 INFO L87 Difference]: Start difference. First operand 4414 states and 5935 transitions. Second operand 3 states. [2020-12-22 09:38:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:28,897 INFO L93 Difference]: Finished difference Result 5918 states and 8808 transitions. [2020-12-22 09:38:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:38:28,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 09:38:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:28,906 INFO L225 Difference]: With dead ends: 5918 [2020-12-22 09:38:28,907 INFO L226 Difference]: Without dead ends: 5165 [2020-12-22 09:38:28,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:38:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2020-12-22 09:38:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5165. [2020-12-22 09:38:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5165 states. [2020-12-22 09:38:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6914 transitions. [2020-12-22 09:38:29,471 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6914 transitions. Word has length 67 [2020-12-22 09:38:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:29,472 INFO L481 AbstractCegarLoop]: Abstraction has 5165 states and 6914 transitions. [2020-12-22 09:38:29,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:38:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6914 transitions. [2020-12-22 09:38:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 09:38:29,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:29,473 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:29,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:38:29,473 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2020-12-22 09:38:29,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:29,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134669119] [2020-12-22 09:38:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:30,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134669119] [2020-12-22 09:38:30,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229112279] [2020-12-22 09:38:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 09:38:30,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:32,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:32,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2020-12-22 09:38:32,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227944167] [2020-12-22 09:38:32,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 09:38:32,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:32,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 09:38:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2020-12-22 09:38:32,095 INFO L87 Difference]: Start difference. First operand 5165 states and 6914 transitions. Second operand 32 states. [2020-12-22 09:38:33,367 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-22 09:38:33,526 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-12-22 09:38:35,028 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-12-22 09:38:35,379 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-12-22 09:38:37,236 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 09:38:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:37,977 INFO L93 Difference]: Finished difference Result 8559 states and 11215 transitions. [2020-12-22 09:38:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 09:38:37,978 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-22 09:38:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:37,987 INFO L225 Difference]: With dead ends: 8559 [2020-12-22 09:38:37,988 INFO L226 Difference]: Without dead ends: 6639 [2020-12-22 09:38:37,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1070, Invalid=4042, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 09:38:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6639 states. [2020-12-22 09:38:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6639 to 4215. [2020-12-22 09:38:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:38:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 5750 transitions. [2020-12-22 09:38:38,399 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 5750 transitions. Word has length 68 [2020-12-22 09:38:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:38,400 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 5750 transitions. [2020-12-22 09:38:38,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 09:38:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 5750 transitions. [2020-12-22 09:38:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 09:38:38,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:38,403 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:38:38,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 09:38:38,618 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:38,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1538014726, now seen corresponding path program 1 times [2020-12-22 09:38:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:38,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206859179] [2020-12-22 09:38:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:38,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206859179] [2020-12-22 09:38:38,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180658155] [2020-12-22 09:38:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 09:38:39,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:39,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:38:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 42 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:40,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:40,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-22 09:38:40,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602421304] [2020-12-22 09:38:40,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 09:38:40,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 09:38:40,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-12-22 09:38:40,188 INFO L87 Difference]: Start difference. First operand 4215 states and 5750 transitions. Second operand 23 states. [2020-12-22 09:38:40,568 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-22 09:38:41,236 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-12-22 09:38:41,657 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-22 09:38:42,069 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-12-22 09:38:42,462 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-22 09:38:42,997 WARN L197 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:38:43,564 WARN L197 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:38:44,349 WARN L197 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-12-22 09:38:45,018 WARN L197 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:38:45,876 WARN L197 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-12-22 09:38:46,552 WARN L197 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2020-12-22 09:38:47,164 WARN L197 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2020-12-22 09:38:47,826 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-12-22 09:38:48,428 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2020-12-22 09:38:49,235 WARN L197 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-12-22 09:38:50,233 WARN L197 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:38:51,289 WARN L197 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:38:52,375 WARN L197 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:38:53,840 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 116 DAG size of output: 99 [2020-12-22 09:38:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:38:54,526 INFO L93 Difference]: Finished difference Result 6589 states and 8737 transitions. [2020-12-22 09:38:54,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 09:38:54,528 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-12-22 09:38:54,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:38:54,533 INFO L225 Difference]: With dead ends: 6589 [2020-12-22 09:38:54,534 INFO L226 Difference]: Without dead ends: 4433 [2020-12-22 09:38:54,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 09:38:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4433 states. [2020-12-22 09:38:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4433 to 4215. [2020-12-22 09:38:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:38:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 5698 transitions. [2020-12-22 09:38:55,012 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 5698 transitions. Word has length 110 [2020-12-22 09:38:55,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:38:55,012 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 5698 transitions. [2020-12-22 09:38:55,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 09:38:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 5698 transitions. [2020-12-22 09:38:55,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 09:38:55,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:38:55,016 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 09:38:55,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 09:38:55,224 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:38:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:38:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash -721276639, now seen corresponding path program 1 times [2020-12-22 09:38:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:38:55,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124753234] [2020-12-22 09:38:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:38:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 25 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:55,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124753234] [2020-12-22 09:38:55,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702149549] [2020-12-22 09:38:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:38:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:38:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 09:38:55,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:38:56,347 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-22 09:38:57,124 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 09:38:57,433 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 34 [2020-12-22 09:38:57,730 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-12-22 09:38:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 27 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:38:58,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:38:58,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 29 [2020-12-22 09:38:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339708661] [2020-12-22 09:38:58,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:38:58,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:38:58,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:38:58,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:38:58,428 INFO L87 Difference]: Start difference. First operand 4215 states and 5698 transitions. Second operand 30 states. [2020-12-22 09:38:58,612 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-22 09:38:59,093 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-22 09:38:59,327 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 09:38:59,800 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 09:39:00,063 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:39:00,423 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:39:00,686 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 09:39:00,994 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 09:39:01,344 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2020-12-22 09:39:01,773 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:39:02,048 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 09:39:02,319 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 09:39:02,817 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-22 09:39:03,508 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:39:04,070 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-12-22 09:39:04,477 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-12-22 09:39:05,032 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-12-22 09:39:05,507 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-22 09:39:05,698 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-12-22 09:39:05,981 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-22 09:39:06,255 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:39:06,586 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 09:39:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:39:07,171 INFO L93 Difference]: Finished difference Result 6307 states and 8289 transitions. [2020-12-22 09:39:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 09:39:07,173 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 111 [2020-12-22 09:39:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:39:07,178 INFO L225 Difference]: With dead ends: 6307 [2020-12-22 09:39:07,179 INFO L226 Difference]: Without dead ends: 4789 [2020-12-22 09:39:07,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=614, Invalid=2926, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 09:39:07,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4789 states. [2020-12-22 09:39:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4789 to 4215. [2020-12-22 09:39:07,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4215 states. [2020-12-22 09:39:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 5672 transitions. [2020-12-22 09:39:07,734 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 5672 transitions. Word has length 111 [2020-12-22 09:39:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:39:07,734 INFO L481 AbstractCegarLoop]: Abstraction has 4215 states and 5672 transitions. [2020-12-22 09:39:07,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:39:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 5672 transitions. [2020-12-22 09:39:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 09:39:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:39:07,738 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 09:39:07,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 09:39:07,952 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:39:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:39:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1699429479, now seen corresponding path program 1 times [2020-12-22 09:39:07,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:39:07,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470167500] [2020-12-22 09:39:07,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:39:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:09,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470167500] [2020-12-22 09:39:09,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119889144] [2020-12-22 09:39:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:39:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:39:09,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 09:39:09,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:39:10,867 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-12-22 09:39:10,880 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:11,308 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 09:39:11,852 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2020-12-22 09:39:11,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:12,187 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-12-22 09:39:12,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:12,630 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 09:39:12,647 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:12,664 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 09:39:22,478 WARN L197 SmtUtils]: Spent 3.71 s on a formula simplification. DAG size of input: 346 DAG size of output: 45 [2020-12-22 09:39:24,652 WARN L197 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:39:26,259 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 09:39:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:39:26,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:39:26,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18] total 39 [2020-12-22 09:39:26,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565418983] [2020-12-22 09:39:26,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 09:39:26,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:39:26,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 09:39:26,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 09:39:26,415 INFO L87 Difference]: Start difference. First operand 4215 states and 5672 transitions. Second operand 39 states. [2020-12-22 09:39:26,920 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 09:39:28,586 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-12-22 09:39:28,976 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 09:39:29,485 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-12-22 09:39:29,981 WARN L197 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 09:39:30,358 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:39:30,753 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-12-22 09:39:31,302 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-12-22 09:39:31,782 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:39:32,318 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-12-22 09:39:33,019 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-12-22 09:39:33,589 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-12-22 09:39:34,595 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-12-22 09:39:38,506 WARN L197 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-22 09:39:38,854 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-12-22 09:39:43,298 WARN L197 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-22 09:39:47,104 WARN L197 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2020-12-22 09:39:47,358 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-22 09:39:50,922 WARN L197 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 72 [2020-12-22 09:39:57,526 WARN L197 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-22 09:40:03,515 WARN L197 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-12-22 09:40:07,468 WARN L197 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:10,330 WARN L197 SmtUtils]: Spent 893.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:40:15,535 WARN L197 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:15,831 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:19,030 WARN L197 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:40:19,325 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:20,160 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-12-22 09:40:23,141 WARN L197 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:40:28,424 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:40:28,921 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 09:40:33,086 WARN L197 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 63 [2020-12-22 09:40:38,654 WARN L197 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 75 [2020-12-22 09:40:41,158 WARN L197 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 09:40:43,536 WARN L197 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:40:47,981 WARN L197 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 58 [2020-12-22 09:40:51,987 WARN L197 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:40:52,519 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-12-22 09:40:55,795 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 09:41:00,804 WARN L197 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 66 [2020-12-22 09:41:04,843 WARN L197 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 09:41:11,245 WARN L197 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 62