/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/loop-invariants/linear-inequality-inv-a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:49:02,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:49:02,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:49:02,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:49:02,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:49:02,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:49:02,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:49:02,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:49:02,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:49:02,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:49:02,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:49:02,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:49:02,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:49:02,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:49:02,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:49:02,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:49:02,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:49:02,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:49:02,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:49:02,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:49:02,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:49:02,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:49:02,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:49:02,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:49:02,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 04:49:02,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 04:49:02,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 04:49:02,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 04:49:02,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 04:49:02,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 04:49:02,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:49:02,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:49:02,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:49:02,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:49:02,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:49:02,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:49:02,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:49:02,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:49:02,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:49:02,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:49:02,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:49:02,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:49:02,520 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:49:02,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:49:02,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:49:02,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:49:02,525 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:49:02,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:49:02,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:49:02,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:49:02,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:49:02,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:49:02,527 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:49:02,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:49:02,528 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:49:02,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:49:02,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:49:02,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:49:02,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:49:02,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:49:02,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:49:02,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:49:02,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:49:02,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:49:02,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:49:02,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:49:02,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:49:02,531 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:49:02,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:49:02,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:49:02,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:49:02,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:49:02,916 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:49:02,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2020-12-22 04:49:03,005 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9376ea0cd/f70cf2e12075469c96ab63899c660acc/FLAGecf301fe7 [2020-12-22 04:49:03,607 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:49:03,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2020-12-22 04:49:03,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9376ea0cd/f70cf2e12075469c96ab63899c660acc/FLAGecf301fe7 [2020-12-22 04:49:03,966 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9376ea0cd/f70cf2e12075469c96ab63899c660acc [2020-12-22 04:49:03,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:49:03,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:49:03,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:03,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:49:03,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:49:03,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:03" (1/1) ... [2020-12-22 04:49:03,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@550c61d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:03, skipping insertion in model container [2020-12-22 04:49:03,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:03" (1/1) ... [2020-12-22 04:49:03,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:49:04,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:49:04,226 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[557,570] [2020-12-22 04:49:04,231 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/loop-invariants/linear-inequality-inv-a.c[613,626] [2020-12-22 04:49:04,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:04,246 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:49:04,266 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/loop-invariants/linear-inequality-inv-a.c[557,570] [2020-12-22 04:49:04,268 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/loop-invariants/linear-inequality-inv-a.c[613,626] [2020-12-22 04:49:04,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:04,288 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:49:04,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04 WrapperNode [2020-12-22 04:49:04,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:04,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:04,291 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:49:04,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:49:04,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:04,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:49:04,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:49:04,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:49:04,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (1/1) ... [2020-12-22 04:49:04,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:49:04,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:49:04,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:49:04,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:49:04,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (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 04:49:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:49:04,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:49:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:49:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:49:04,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:49:04,695 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-22 04:49:04,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:04 BoogieIcfgContainer [2020-12-22 04:49:04,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:49:04,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:49:04,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:49:04,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:49:04,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:49:03" (1/3) ... [2020-12-22 04:49:04,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea7f3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:04, skipping insertion in model container [2020-12-22 04:49:04,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:04" (2/3) ... [2020-12-22 04:49:04,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea7f3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:04, skipping insertion in model container [2020-12-22 04:49:04,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:04" (3/3) ... [2020-12-22 04:49:04,706 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2020-12-22 04:49:04,714 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:49:04,719 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 04:49:04,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 04:49:04,806 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:49:04,806 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:49:04,806 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:49:04,807 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:49:04,807 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:49:04,810 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:49:04,810 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:49:04,811 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:49:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-22 04:49:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:49:04,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:04,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:49:04,867 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash 889577263, now seen corresponding path program 1 times [2020-12-22 04:49:04,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:04,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695734394] [2020-12-22 04:49:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:05,145 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 04:49:05,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695734394] [2020-12-22 04:49:05,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:05,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:49:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244188571] [2020-12-22 04:49:05,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:49:05,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:05,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:49:05,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:49:05,180 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-22 04:49:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:05,199 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2020-12-22 04:49:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:49:05,201 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:49:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:05,216 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:49:05,216 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:49:05,220 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 04:49:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:49:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:49:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:49:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:49:05,256 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2020-12-22 04:49:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:05,257 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:49:05,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:49:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:49:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:49:05,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:05,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:49:05,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:49:05,259 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash 889573419, now seen corresponding path program 1 times [2020-12-22 04:49:05,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:05,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629858084] [2020-12-22 04:49:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:05,417 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 04:49:05,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629858084] [2020-12-22 04:49:05,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:05,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:05,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91505541] [2020-12-22 04:49:05,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:05,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:05,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:05,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:05,422 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 3 states. [2020-12-22 04:49:05,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:05,436 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-22 04:49:05,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:05,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:49:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:05,438 INFO L225 Difference]: With dead ends: 17 [2020-12-22 04:49:05,438 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:49:05,439 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 04:49:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:49:05,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:49:05,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:49:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:49:05,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2020-12-22 04:49:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:05,444 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:49:05,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:49:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:49:05,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:05,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:05,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:49:05,445 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1807024099, now seen corresponding path program 1 times [2020-12-22 04:49:05,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:05,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094585662] [2020-12-22 04:49:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:05,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094585662] [2020-12-22 04:49:05,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772612043] [2020-12-22 04:49:05,586 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 04:49:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:05,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:49:05,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:05,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:05,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:49:05,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552360994] [2020-12-22 04:49:05,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:49:05,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:05,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:49:05,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:05,684 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2020-12-22 04:49:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:05,726 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-22 04:49:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:49:05,727 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 04:49:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:05,728 INFO L225 Difference]: With dead ends: 23 [2020-12-22 04:49:05,728 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:49:05,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:05,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:49:05,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2020-12-22 04:49:05,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:49:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 04:49:05,734 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2020-12-22 04:49:05,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:05,734 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 04:49:05,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:49:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 04:49:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:49:05,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:05,736 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:05,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:49:05,951 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:05,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:05,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1385031907, now seen corresponding path program 2 times [2020-12-22 04:49:05,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:05,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109759179] [2020-12-22 04:49:05,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:06,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109759179] [2020-12-22 04:49:06,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576500509] [2020-12-22 04:49:06,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 04:49:06,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:06,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:06,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:49:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:06,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:06,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:49:06,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076417750] [2020-12-22 04:49:06,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:06,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:06,452 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-12-22 04:49:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:06,575 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-12-22 04:49:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:49:06,576 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-22 04:49:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:06,577 INFO L225 Difference]: With dead ends: 27 [2020-12-22 04:49:06,577 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:49:06,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:49:06,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:49:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-22 04:49:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:49:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 04:49:06,583 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2020-12-22 04:49:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:06,584 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 04:49:06,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 04:49:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:49:06,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:06,585 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:06,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:06,802 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash -422538781, now seen corresponding path program 3 times [2020-12-22 04:49:06,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:06,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008681357] [2020-12-22 04:49:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:06,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008681357] [2020-12-22 04:49:06,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409648430] [2020-12-22 04:49:06,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:49:07,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:49:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:07,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:49:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:07,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:07,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:49:07,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903018470] [2020-12-22 04:49:07,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:49:07,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:07,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:49:07,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:07,376 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2020-12-22 04:49:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:07,514 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-22 04:49:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:49:07,515 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-22 04:49:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:07,516 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:49:07,516 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:49:07,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:49:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:49:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-12-22 04:49:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:49:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 04:49:07,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2020-12-22 04:49:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:07,522 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 04:49:07,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:49:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 04:49:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:49:07,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:07,523 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:07,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:07,738 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1963784931, now seen corresponding path program 4 times [2020-12-22 04:49:07,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:07,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408463081] [2020-12-22 04:49:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:07,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408463081] [2020-12-22 04:49:07,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384623076] [2020-12-22 04:49:07,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 04:49:08,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:08,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:49:08,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:08,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:08,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:49:08,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979685820] [2020-12-22 04:49:08,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:49:08,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:08,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:49:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:49:08,223 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 11 states. [2020-12-22 04:49:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:08,458 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-12-22 04:49:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:49:08,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 04:49:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:08,459 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:49:08,459 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:49:08,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:49:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:49:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-22 04:49:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:49:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 04:49:08,465 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2020-12-22 04:49:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:08,465 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 04:49:08,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:49:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 04:49:08,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:49:08,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:08,466 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:08,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:08,680 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:08,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:08,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1708336099, now seen corresponding path program 5 times [2020-12-22 04:49:08,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:08,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323993301] [2020-12-22 04:49:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:08,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323993301] [2020-12-22 04:49:08,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535847231] [2020-12-22 04:49:08,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 04:49:09,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:49:09,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:49:09,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:09,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:09,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:49:09,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019847146] [2020-12-22 04:49:09,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:49:09,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:09,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:49:09,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:49:09,277 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2020-12-22 04:49:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:09,544 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-12-22 04:49:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:49:09,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-22 04:49:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:09,545 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:49:09,545 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:49:09,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:49:09,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:49:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-12-22 04:49:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:49:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 04:49:09,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-12-22 04:49:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:09,552 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 04:49:09,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:49:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 04:49:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:49:09,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:09,553 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:09,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:49:09,760 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:09,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1035144419, now seen corresponding path program 6 times [2020-12-22 04:49:09,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:09,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440979265] [2020-12-22 04:49:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:10,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440979265] [2020-12-22 04:49:10,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679762036] [2020-12-22 04:49:10,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 04:49:10,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:49:10,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:10,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:49:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:10,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:10,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:49:10,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159764060] [2020-12-22 04:49:10,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:49:10,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:10,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:49:10,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:49:10,564 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 15 states. [2020-12-22 04:49:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:10,861 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-12-22 04:49:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:49:10,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-22 04:49:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:10,863 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:49:10,863 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:49:10,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:49:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:49:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-12-22 04:49:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:49:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 04:49:10,869 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2020-12-22 04:49:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:10,869 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 04:49:10,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:49:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 04:49:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:49:10,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:10,870 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:11,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:11,078 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1656965661, now seen corresponding path program 7 times [2020-12-22 04:49:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:11,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368166464] [2020-12-22 04:49:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:11,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368166464] [2020-12-22 04:49:11,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682182159] [2020-12-22 04:49:11,358 INFO L93 rtionOrderModulation]: Changing assertion order to 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 04:49:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:11,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:49:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:11,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:11,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:49:11,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204315731] [2020-12-22 04:49:11,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:49:11,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:11,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:49:11,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:49:11,870 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 17 states. [2020-12-22 04:49:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:12,240 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-22 04:49:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:49:12,241 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-22 04:49:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:12,242 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:49:12,242 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:49:12,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=539, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:49:12,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:49:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-12-22 04:49:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:49:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-22 04:49:12,248 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2020-12-22 04:49:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:12,248 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-22 04:49:12,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:49:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-22 04:49:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:49:12,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:12,249 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:12,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:12,464 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1090526947, now seen corresponding path program 8 times [2020-12-22 04:49:12,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:12,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211339100] [2020-12-22 04:49:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:12,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211339100] [2020-12-22 04:49:12,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380649503] [2020-12-22 04:49:12,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 04:49:12,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:12,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:49:13,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:13,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:13,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:49:13,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498432679] [2020-12-22 04:49:13,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:49:13,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:13,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:49:13,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:49:13,406 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 19 states. [2020-12-22 04:49:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:13,873 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-22 04:49:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:49:13,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-22 04:49:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:13,875 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:49:13,875 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:49:13,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:49:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:49:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-12-22 04:49:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:49:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 04:49:13,881 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2020-12-22 04:49:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:13,881 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 04:49:13,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:49:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 04:49:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:49:13,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:13,882 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:14,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:49:14,098 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:14,100 INFO L82 PathProgramCache]: Analyzing trace with hash 26036195, now seen corresponding path program 9 times [2020-12-22 04:49:14,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:14,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373277441] [2020-12-22 04:49:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:14,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373277441] [2020-12-22 04:49:14,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316210787] [2020-12-22 04:49:14,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 04:49:15,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:49:15,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:15,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:49:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:15,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:15,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:49:15,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130631933] [2020-12-22 04:49:15,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:49:15,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:15,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:49:15,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:49:15,559 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 21 states. [2020-12-22 04:49:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:16,130 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-22 04:49:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:49:16,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-22 04:49:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:16,132 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:49:16,133 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:49:16,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=533, Invalid=873, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:49:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:49:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-12-22 04:49:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:49:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 04:49:16,139 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-12-22 04:49:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:16,139 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 04:49:16,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:49:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 04:49:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:49:16,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:16,140 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:16,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:16,345 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:16,346 INFO L82 PathProgramCache]: Analyzing trace with hash -747360029, now seen corresponding path program 10 times [2020-12-22 04:49:16,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:16,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854367126] [2020-12-22 04:49:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:16,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854367126] [2020-12-22 04:49:16,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572449320] [2020-12-22 04:49:16,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 04:49:17,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:49:17,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:17,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:17,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:49:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850758162] [2020-12-22 04:49:17,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:49:17,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:17,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:49:17,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:49:17,610 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states. [2020-12-22 04:49:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:18,228 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-12-22 04:49:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:49:18,228 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-22 04:49:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:18,229 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:49:18,229 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:49:18,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 7 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=652, Invalid=1070, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:49:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:49:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-12-22 04:49:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:49:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-22 04:49:18,235 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-12-22 04:49:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:18,236 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-22 04:49:18,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:49:18,236 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-22 04:49:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:49:18,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:18,237 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:18,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:18,451 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:18,452 INFO L82 PathProgramCache]: Analyzing trace with hash -951789085, now seen corresponding path program 11 times [2020-12-22 04:49:18,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:18,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724420625] [2020-12-22 04:49:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:18,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724420625] [2020-12-22 04:49:18,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172949703] [2020-12-22 04:49:18,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:24,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:49:24,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:24,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:49:24,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:25,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:25,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:49:25,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960153294] [2020-12-22 04:49:25,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:49:25,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:25,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:49:25,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:49:25,097 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 25 states. [2020-12-22 04:49:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:25,866 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-22 04:49:25,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:49:25,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-22 04:49:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:25,867 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:49:25,868 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:49:25,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 7 SyntacticMatches, 20 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:49:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:49:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-12-22 04:49:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:49:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-12-22 04:49:25,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2020-12-22 04:49:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:25,881 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-12-22 04:49:25,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:49:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-12-22 04:49:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:49:25,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:25,885 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:26,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:49:26,092 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash 160383715, now seen corresponding path program 12 times [2020-12-22 04:49:26,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:26,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531569801] [2020-12-22 04:49:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:26,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531569801] [2020-12-22 04:49:26,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493817989] [2020-12-22 04:49:26,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:30,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:49:30,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:49:30,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:30,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:30,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:49:30,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235743996] [2020-12-22 04:49:30,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:49:30,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:30,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:49:30,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:49:30,926 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 27 states. [2020-12-22 04:49:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:31,827 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2020-12-22 04:49:31,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:49:31,827 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-22 04:49:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:31,828 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:49:31,828 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:49:31,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 7 SyntacticMatches, 22 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=926, Invalid=1524, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:49:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:49:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-22 04:49:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:49:31,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 04:49:31,835 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-12-22 04:49:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:31,835 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 04:49:31,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:49:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 04:49:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:49:31,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:31,836 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:32,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:49:32,041 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:32,042 INFO L82 PathProgramCache]: Analyzing trace with hash -488412189, now seen corresponding path program 13 times [2020-12-22 04:49:32,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:32,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754452029] [2020-12-22 04:49:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:32,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754452029] [2020-12-22 04:49:32,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696343271] [2020-12-22 04:49:32,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:49:32,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:33,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:33,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:49:33,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444014759] [2020-12-22 04:49:33,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:49:33,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:33,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:49:33,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:49:33,795 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2020-12-22 04:49:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:34,796 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-12-22 04:49:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:49:34,796 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-22 04:49:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:34,797 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:49:34,797 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:49:34,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 7 SyntacticMatches, 24 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1781, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:49:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:49:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-12-22 04:49:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:49:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-22 04:49:34,804 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2020-12-22 04:49:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:34,804 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-22 04:49:34,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:49:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-22 04:49:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:49:34,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:34,805 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:35,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:49:35,019 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1211018013, now seen corresponding path program 14 times [2020-12-22 04:49:35,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:35,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034272138] [2020-12-22 04:49:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:35,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034272138] [2020-12-22 04:49:35,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072077165] [2020-12-22 04:49:35,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:36,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:36,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:49:36,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:37,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:37,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:49:37,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006988374] [2020-12-22 04:49:37,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:49:37,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:37,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:49:37,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:49:37,124 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 31 states. [2020-12-22 04:49:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:38,296 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-12-22 04:49:38,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:49:38,297 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-22 04:49:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:38,298 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:49:38,298 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:49:38,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 7 SyntacticMatches, 26 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:49:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:49:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-12-22 04:49:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:49:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-22 04:49:38,305 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 33 [2020-12-22 04:49:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:38,305 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-22 04:49:38,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:49:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-22 04:49:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:49:38,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:38,306 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:38,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:38,520 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash 149487075, now seen corresponding path program 15 times [2020-12-22 04:49:38,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:38,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067172681] [2020-12-22 04:49:38,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:39,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067172681] [2020-12-22 04:49:39,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938519274] [2020-12-22 04:49:39,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:41,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:49:41,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:49:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:42,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:42,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:49:42,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776612980] [2020-12-22 04:49:42,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:49:42,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:42,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:49:42,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:49:42,450 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 33 states. [2020-12-22 04:49:43,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:43,686 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2020-12-22 04:49:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:49:43,687 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-22 04:49:43,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:43,688 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:49:43,688 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:49:43,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 7 SyntacticMatches, 28 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1427, Invalid=2355, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:49:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:49:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-22 04:49:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:49:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-22 04:49:43,695 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 35 [2020-12-22 04:49:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:43,695 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-22 04:49:43,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:49:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-22 04:49:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:49:43,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:43,696 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:43,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:49:43,897 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:43,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:43,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1924818659, now seen corresponding path program 16 times [2020-12-22 04:49:43,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:43,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621724931] [2020-12-22 04:49:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:44,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621724931] [2020-12-22 04:49:44,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96889694] [2020-12-22 04:49:44,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:45,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:45,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:45,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:49:45,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:46,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:46,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:49:46,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396536958] [2020-12-22 04:49:46,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:49:46,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:46,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:49:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:49:46,575 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2020-12-22 04:49:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:48,071 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-12-22 04:49:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:49:48,072 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-22 04:49:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:48,072 INFO L225 Difference]: With dead ends: 55 [2020-12-22 04:49:48,073 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:49:48,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 7 SyntacticMatches, 30 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1618, Invalid=2672, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 04:49:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:49:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-22 04:49:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:49:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-22 04:49:48,082 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2020-12-22 04:49:48,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:48,082 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-22 04:49:48,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:49:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-22 04:49:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:49:48,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:48,083 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:48,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:49:48,287 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1378512925, now seen corresponding path program 17 times [2020-12-22 04:49:48,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:48,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247530265] [2020-12-22 04:49:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:49,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247530265] [2020-12-22 04:49:49,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119050339] [2020-12-22 04:49:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:06,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:52:06,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:52:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:08,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:08,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:52:08,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881928721] [2020-12-22 04:52:08,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:52:08,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:52:08,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:52:08,217 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 37 states. [2020-12-22 04:52:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:09,880 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 04:52:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:52:09,881 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-12-22 04:52:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:09,881 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:52:09,882 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:52:09,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 7 SyntacticMatches, 32 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1821, Invalid=3009, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:52:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:52:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-12-22 04:52:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:52:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-12-22 04:52:09,889 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2020-12-22 04:52:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:09,889 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-12-22 04:52:09,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:52:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-12-22 04:52:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:52:09,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:09,890 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:10,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:10,098 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1899333405, now seen corresponding path program 18 times [2020-12-22 04:52:10,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:10,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285359792] [2020-12-22 04:52:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:11,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285359792] [2020-12-22 04:52:11,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077930597] [2020-12-22 04:52:11,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:49,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:52:49,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:52:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 04:52:49,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:51,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:51,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:52:51,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930254910] [2020-12-22 04:52:51,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:52:51,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:52:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:52:51,315 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 39 states. [2020-12-22 04:52:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:53,185 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-12-22 04:52:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:52:53,187 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-22 04:52:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:53,187 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:52:53,188 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:52:53,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 7 SyntacticMatches, 34 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2036, Invalid=3366, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 04:52:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:52:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-12-22 04:52:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:52:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-22 04:52:53,197 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2020-12-22 04:52:53,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:53,198 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-22 04:52:53,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:52:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-22 04:52:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:52:53,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:53,199 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:53,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:53,400 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:53,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash 103358947, now seen corresponding path program 19 times [2020-12-22 04:52:53,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:53,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790677380] [2020-12-22 04:52:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790677380] [2020-12-22 04:52:54,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283988960] [2020-12-22 04:52:54,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:52:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:52:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:52:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:52:56,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:52:56,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:52:56,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109498188] [2020-12-22 04:52:56,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:52:56,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:52:56,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:52:56,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:52:56,866 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 41 states. [2020-12-22 04:52:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:52:58,792 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-12-22 04:52:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:52:58,793 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-22 04:52:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:52:58,794 INFO L225 Difference]: With dead ends: 61 [2020-12-22 04:52:58,794 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:52:58,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 7 SyntacticMatches, 36 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2263, Invalid=3743, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 04:52:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:52:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-12-22 04:52:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:52:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-22 04:52:58,803 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2020-12-22 04:52:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:52:58,803 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-22 04:52:58,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:52:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-22 04:52:58,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:52:58,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:52:58,804 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-12-22 04:52:59,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:52:59,010 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:52:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:52:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash 545360611, now seen corresponding path program 20 times [2020-12-22 04:52:59,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:52:59,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583650227] [2020-12-22 04:52:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:52:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:00,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583650227] [2020-12-22 04:53:00,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548986382] [2020-12-22 04:53:00,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:00,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:53:00,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:00,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 04:53:00,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:02,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:02,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:53:02,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52461944] [2020-12-22 04:53:02,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:53:02,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:02,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:53:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:53:02,846 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 43 states. [2020-12-22 04:53:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:05,104 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-12-22 04:53:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:53:05,106 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-12-22 04:53:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:05,106 INFO L225 Difference]: With dead ends: 63 [2020-12-22 04:53:05,106 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:53:05,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 38 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 04:53:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:53:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-22 04:53:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:53:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-22 04:53:05,114 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2020-12-22 04:53:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:05,114 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-22 04:53:05,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:53:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-22 04:53:05,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:53:05,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:05,115 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:05,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:53:05,330 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:05,331 INFO L82 PathProgramCache]: Analyzing trace with hash 107197411, now seen corresponding path program 21 times [2020-12-22 04:53:05,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:05,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610111237] [2020-12-22 04:53:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:07,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610111237] [2020-12-22 04:53:07,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513152045] [2020-12-22 04:53:07,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:17,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:53:17,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:17,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 04:53:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:20,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:20,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:53:20,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021200308] [2020-12-22 04:53:20,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:53:20,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:20,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:53:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:53:20,088 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 45 states. [2020-12-22 04:53:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:22,567 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-12-22 04:53:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:53:22,567 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-12-22 04:53:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:22,568 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:53:22,568 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:53:22,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 7 SyntacticMatches, 40 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2753, Invalid=4557, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 04:53:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:53:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-12-22 04:53:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:53:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-22 04:53:22,574 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 47 [2020-12-22 04:53:22,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:22,574 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-22 04:53:22,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:53:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-22 04:53:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:53:22,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:22,575 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:22,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:53:22,780 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:22,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:22,781 INFO L82 PathProgramCache]: Analyzing trace with hash -60842781, now seen corresponding path program 22 times [2020-12-22 04:53:22,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:22,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322626229] [2020-12-22 04:53:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:53:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:24,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322626229] [2020-12-22 04:53:24,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070655134] [2020-12-22 04:53:24,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:24,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:53:24,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:53:24,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:53:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:53:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:53:27,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:53:27,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:53:27,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618084157] [2020-12-22 04:53:27,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:53:27,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:53:27,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:53:27,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:53:27,562 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 47 states. [2020-12-22 04:53:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:53:30,268 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2020-12-22 04:53:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:53:30,269 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2020-12-22 04:53:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:53:30,269 INFO L225 Difference]: With dead ends: 67 [2020-12-22 04:53:30,269 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:53:30,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 7 SyntacticMatches, 42 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3016, Invalid=4994, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 04:53:30,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:53:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-12-22 04:53:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:53:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-22 04:53:30,283 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2020-12-22 04:53:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:53:30,283 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-22 04:53:30,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:53:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-22 04:53:30,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:53:30,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:53:30,285 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1] [2020-12-22 04:53:30,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:53:30,498 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:53:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:53:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1661289955, now seen corresponding path program 23 times [2020-12-22 04:53:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:53:30,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233518035] [2020-12-22 04:53:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:53:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat