/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-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:57:33,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:57:33,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:57:33,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:57:33,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:57:33,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:57:33,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:57:33,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:57:33,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:57:33,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:57:33,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:57:33,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:57:33,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:57:33,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:57:33,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:57:33,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:57:33,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:57:33,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:57:33,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:57:33,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:57:33,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:57:33,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:57:33,744 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:57:33,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:57:33,761 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 06:57:33,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 06:57:33,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 06:57:33,765 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 06:57:33,765 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 06:57:33,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 06:57:33,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:57:33,768 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:57:33,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:57:33,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:57:33,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:57:33,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:57:33,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:57:33,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:57:33,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:57:33,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:57:33,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:57:33,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:57:33,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:57:33,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:57:33,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:57:33,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:57:33,844 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:57:33,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:57:33,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:57:33,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:57:33,845 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:57:33,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:57:33,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:57:33,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:57:33,848 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:57:33,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:57:33,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:57:33,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:57:33,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:57:33,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:57:33,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:57:33,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:57:33,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:57:33,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:57:33,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:57:33,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:57:33,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:57:33,851 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:57:34,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:57:34,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:57:34,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:57:34,330 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:57:34,331 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:57:34,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_k.i [2020-12-23 06:57:34,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/386d318f8/08226f7ac3214d5db314f912e7487751/FLAGf92152f2c [2020-12-23 06:57:35,059 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:57:35,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i [2020-12-23 06:57:35,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/386d318f8/08226f7ac3214d5db314f912e7487751/FLAGf92152f2c [2020-12-23 06:57:35,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/386d318f8/08226f7ac3214d5db314f912e7487751 [2020-12-23 06:57:35,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:57:35,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:57:35,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:57:35,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:57:35,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:57:35,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d48d15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35, skipping insertion in model container [2020-12-23 06:57:35,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:57:35,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:57:35,647 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:57:35,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:57:35,671 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:57:35,686 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:57:35,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:57:35,709 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:57:35,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35 WrapperNode [2020-12-23 06:57:35,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:57:35,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:57:35,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:57:35,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:57:35,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,729 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:57:35,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:57:35,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:57:35,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:57:35,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... [2020-12-23 06:57:35,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:57:35,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:57:35,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:57:35,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:57:35,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:57:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:57:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:57:35,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:57:36,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:57:36,114 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:57:36,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:57:36 BoogieIcfgContainer [2020-12-23 06:57:36,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:57:36,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:57:36,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:57:36,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:57:36,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:57:35" (1/3) ... [2020-12-23 06:57:36,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af870fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:57:36, skipping insertion in model container [2020-12-23 06:57:36,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:35" (2/3) ... [2020-12-23 06:57:36,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af870fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:57:36, skipping insertion in model container [2020-12-23 06:57:36,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:57:36" (3/3) ... [2020-12-23 06:57:36,127 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2020-12-23 06:57:36,136 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:57:36,147 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:57:36,216 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:57:36,259 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:57:36,259 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:57:36,259 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:57:36,260 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:57:36,260 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:57:36,260 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:57:36,260 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:57:36,260 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:57:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-23 06:57:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:57:36,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:36,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:36,284 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1807120264, now seen corresponding path program 1 times [2020-12-23 06:57:36,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:36,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818529676] [2020-12-23 06:57:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818529676] [2020-12-23 06:57:36,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:57:36,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:57:36,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316915406] [2020-12-23 06:57:36,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:57:36,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:57:36,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:57:36,577 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-23 06:57:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:36,598 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-23 06:57:36,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:57:36,600 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-12-23 06:57:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:36,622 INFO L225 Difference]: With dead ends: 21 [2020-12-23 06:57:36,622 INFO L226 Difference]: Without dead ends: 9 [2020-12-23 06:57:36,627 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 [2020-12-23 06:57:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-23 06:57:36,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-23 06:57:36,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:57:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:57:36,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-23 06:57:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:36,670 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:57:36,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:57:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:57:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 06:57:36,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:36,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:36,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:57:36,673 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1806941518, now seen corresponding path program 1 times [2020-12-23 06:57:36,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:36,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502788066] [2020-12-23 06:57:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502788066] [2020-12-23 06:57:36,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:57:36,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 06:57:36,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573518228] [2020-12-23 06:57:36,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:57:36,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:36,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:57:36,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:57:36,933 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-23 06:57:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:36,999 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-23 06:57:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:57:37,000 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 06:57:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:37,001 INFO L225 Difference]: With dead ends: 15 [2020-12-23 06:57:37,001 INFO L226 Difference]: Without dead ends: 11 [2020-12-23 06:57:37,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:57:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-23 06:57:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-12-23 06:57:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-23 06:57:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-23 06:57:37,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2020-12-23 06:57:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:37,007 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-23 06:57:37,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:57:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-23 06:57:37,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 06:57:37,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:37,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:37,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:57:37,009 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1357243696, now seen corresponding path program 1 times [2020-12-23 06:57:37,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:37,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66294071] [2020-12-23 06:57:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66294071] [2020-12-23 06:57:37,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354296507] [2020-12-23 06:57:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:37,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:57:37,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:37,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-23 06:57:37,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632637680] [2020-12-23 06:57:37,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:57:37,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:37,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:57:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:57:37,324 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2020-12-23 06:57:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:37,484 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-23 06:57:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:57:37,485 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 06:57:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:37,487 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:57:37,487 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:57:37,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:57:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:57:37,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-23 06:57:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-23 06:57:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-23 06:57:37,504 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2020-12-23 06:57:37,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:37,504 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-23 06:57:37,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:57:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-23 06:57:37,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:57:37,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:37,505 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:37,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:57:37,719 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -530250892, now seen corresponding path program 2 times [2020-12-23 06:57:37,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:37,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938757989] [2020-12-23 06:57:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938757989] [2020-12-23 06:57:37,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713153415] [2020-12-23 06:57:37,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:37,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:37,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:37,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:57:37,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:37,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-12-23 06:57:37,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847704435] [2020-12-23 06:57:37,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:57:37,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:37,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:57:37,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:57:37,942 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-23 06:57:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:38,107 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-23 06:57:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:57:38,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-23 06:57:38,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:38,108 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:57:38,108 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:57:38,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:57:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:57:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 06:57:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:57:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-23 06:57:38,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2020-12-23 06:57:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:38,115 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-23 06:57:38,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:57:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-23 06:57:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 06:57:38,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:38,116 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:38,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:38,331 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1251080700, now seen corresponding path program 3 times [2020-12-23 06:57:38,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:38,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862257830] [2020-12-23 06:57:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:38,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862257830] [2020-12-23 06:57:38,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962337600] [2020-12-23 06:57:38,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:38,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 06:57:38,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:38,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:57:38,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:38,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:38,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2020-12-23 06:57:38,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527617140] [2020-12-23 06:57:38,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:57:38,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:38,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:57:38,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:57:38,650 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 15 states. [2020-12-23 06:57:38,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:38,979 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-23 06:57:38,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:57:38,980 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-12-23 06:57:38,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:38,981 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:57:38,981 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:57:38,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:57:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:57:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 06:57:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 06:57:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-23 06:57:38,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 21 [2020-12-23 06:57:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:38,988 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-23 06:57:38,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:57:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-23 06:57:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 06:57:38,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:38,989 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:39,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:39,205 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:39,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1338239108, now seen corresponding path program 4 times [2020-12-23 06:57:39,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:39,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510742442] [2020-12-23 06:57:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:39,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510742442] [2020-12-23 06:57:39,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754345935] [2020-12-23 06:57:39,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:39,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:39,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:57:39,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:39,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:39,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2020-12-23 06:57:39,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6258202] [2020-12-23 06:57:39,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:57:39,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:39,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:57:39,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:57:39,713 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 19 states. [2020-12-23 06:57:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:40,345 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-12-23 06:57:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:57:40,346 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-12-23 06:57:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:40,349 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:57:40,349 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:57:40,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:57:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:57:40,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-23 06:57:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 06:57:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-23 06:57:40,366 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 29 [2020-12-23 06:57:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:40,367 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-23 06:57:40,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:57:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-23 06:57:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 06:57:40,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:40,370 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:40,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:40,582 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:40,583 INFO L82 PathProgramCache]: Analyzing trace with hash -142422260, now seen corresponding path program 5 times [2020-12-23 06:57:40,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:40,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389868101] [2020-12-23 06:57:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:40,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389868101] [2020-12-23 06:57:40,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329928648] [2020-12-23 06:57:40,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:41,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-23 06:57:41,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:41,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:57:41,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:41,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:41,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2020-12-23 06:57:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709841406] [2020-12-23 06:57:41,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:57:41,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:57:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:57:41,494 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 29 states. [2020-12-23 06:57:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:42,710 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-12-23 06:57:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:57:42,710 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-12-23 06:57:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:42,711 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:57:42,712 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:57:42,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=580, Invalid=1582, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:57:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:57:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 06:57:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 06:57:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-23 06:57:42,721 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 37 [2020-12-23 06:57:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:42,721 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-23 06:57:42,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:57:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-23 06:57:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 06:57:42,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:42,723 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:42,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 06:57:42,937 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:42,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1096199572, now seen corresponding path program 6 times [2020-12-23 06:57:42,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:42,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614173869] [2020-12-23 06:57:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:43,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614173869] [2020-12-23 06:57:43,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108664061] [2020-12-23 06:57:43,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:43,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2020-12-23 06:57:43,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:43,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:57:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:43,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:43,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 27 [2020-12-23 06:57:43,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81606761] [2020-12-23 06:57:43,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:57:43,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:57:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:57:43,875 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 27 states. [2020-12-23 06:57:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:45,159 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-12-23 06:57:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:57:45,159 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 45 [2020-12-23 06:57:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:45,161 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:57:45,161 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:57:45,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:57:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:57:45,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 06:57:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 06:57:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-23 06:57:45,171 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 45 [2020-12-23 06:57:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:45,171 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-23 06:57:45,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:57:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-23 06:57:45,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 06:57:45,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:45,173 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:45,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:45,386 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:45,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:45,387 INFO L82 PathProgramCache]: Analyzing trace with hash 617055260, now seen corresponding path program 7 times [2020-12-23 06:57:45,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:45,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951319053] [2020-12-23 06:57:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:46,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951319053] [2020-12-23 06:57:46,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419100018] [2020-12-23 06:57:46,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:46,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:57:46,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:46,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:46,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 31 [2020-12-23 06:57:46,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358590479] [2020-12-23 06:57:46,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:57:46,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:46,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:57:46,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:57:46,366 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 31 states. [2020-12-23 06:57:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:48,313 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-12-23 06:57:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:57:48,314 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 53 [2020-12-23 06:57:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:48,315 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:57:48,316 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:57:48,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=845, Invalid=2347, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:57:48,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:57:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-23 06:57:48,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-23 06:57:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-23 06:57:48,327 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 53 [2020-12-23 06:57:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:48,327 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-23 06:57:48,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:57:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-23 06:57:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 06:57:48,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:48,329 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:48,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:48,542 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1856154972, now seen corresponding path program 8 times [2020-12-23 06:57:48,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:48,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789597074] [2020-12-23 06:57:48,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:49,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789597074] [2020-12-23 06:57:49,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499203219] [2020-12-23 06:57:49,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:49,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:49,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:57:49,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:49,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:49,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 35 [2020-12-23 06:57:49,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656847092] [2020-12-23 06:57:49,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:57:49,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:49,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:57:49,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1115, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:57:49,841 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 35 states. [2020-12-23 06:57:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:52,536 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-12-23 06:57:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:57:52,537 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 61 [2020-12-23 06:57:52,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:52,539 INFO L225 Difference]: With dead ends: 74 [2020-12-23 06:57:52,539 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:57:52,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1093, Invalid=3067, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:57:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:57:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-23 06:57:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 06:57:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2020-12-23 06:57:52,550 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 61 [2020-12-23 06:57:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:52,550 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2020-12-23 06:57:52,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:57:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2020-12-23 06:57:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 06:57:52,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:52,552 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:52,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 06:57:52,764 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:52,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:52,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1855985964, now seen corresponding path program 9 times [2020-12-23 06:57:52,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:52,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870901294] [2020-12-23 06:57:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:53,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870901294] [2020-12-23 06:57:53,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48400593] [2020-12-23 06:57:53,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:53,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2020-12-23 06:57:53,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:57:53,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:54,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:54,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 39 [2020-12-23 06:57:54,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133538942] [2020-12-23 06:57:54,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:57:54,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:57:54,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1399, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:57:54,169 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 39 states. [2020-12-23 06:57:54,630 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-23 06:57:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:57,719 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-12-23 06:57:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:57:57,720 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 69 [2020-12-23 06:57:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:57,721 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:57:57,721 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:57:57,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1373, Invalid=3883, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:57:57,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:57:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-23 06:57:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 06:57:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2020-12-23 06:57:57,732 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 69 [2020-12-23 06:57:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:57,733 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2020-12-23 06:57:57,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:57:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2020-12-23 06:57:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 06:57:57,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:57,734 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:57,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:57,950 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:57,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:57,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1676159052, now seen corresponding path program 10 times [2020-12-23 06:57:57,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:57,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651766519] [2020-12-23 06:57:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:59,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651766519] [2020-12-23 06:57:59,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105967477] [2020-12-23 06:57:59,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:59,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:59,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:59,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:57:59,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:59,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:59,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 43 [2020-12-23 06:57:59,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895193496] [2020-12-23 06:57:59,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:57:59,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:59,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:57:59,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1715, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:57:59,640 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 43 states. [2020-12-23 06:57:59,910 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 8 [2020-12-23 06:58:00,043 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 7 [2020-12-23 06:58:00,171 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 06:58:00,315 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-23 06:58:00,451 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 06:58:00,593 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-23 06:58:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:04,253 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-12-23 06:58:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:58:04,254 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 77 [2020-12-23 06:58:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:04,255 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:58:04,255 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:58:04,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1685, Invalid=4795, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 06:58:04,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:58:04,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-23 06:58:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 06:58:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2020-12-23 06:58:04,277 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 77 [2020-12-23 06:58:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:04,278 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2020-12-23 06:58:04,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:58:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2020-12-23 06:58:04,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 06:58:04,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:04,280 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:04,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:04,483 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash -246641092, now seen corresponding path program 11 times [2020-12-23 06:58:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:04,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724484754] [2020-12-23 06:58:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:05,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724484754] [2020-12-23 06:58:05,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531070301] [2020-12-23 06:58:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:06,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2020-12-23 06:58:06,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:06,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:58:06,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:08,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:08,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 65 [2020-12-23 06:58:08,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929213499] [2020-12-23 06:58:08,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 06:58:08,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 06:58:08,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:58:08,115 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 65 states. [2020-12-23 06:58:08,290 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 8 [2020-12-23 06:58:08,527 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2020-12-23 06:58:08,786 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 7 [2020-12-23 06:58:09,058 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 9 [2020-12-23 06:58:09,329 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-23 06:58:09,603 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-12-23 06:58:09,864 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-23 06:58:10,130 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-23 06:58:10,394 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-23 06:58:10,663 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-23 06:58:10,939 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-23 06:58:11,207 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-23 06:58:11,490 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-23 06:58:11,773 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-23 06:58:12,064 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-23 06:58:12,337 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-23 06:58:12,593 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-23 06:58:12,842 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-23 06:58:13,102 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-23 06:58:13,357 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-23 06:58:13,624 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-23 06:58:13,883 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-23 06:58:14,139 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-23 06:58:14,388 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 06:58:14,623 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 06:58:14,871 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-23 06:58:17,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:17,516 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-12-23 06:58:17,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:58:17,517 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 85 [2020-12-23 06:58:17,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:17,518 INFO L225 Difference]: With dead ends: 98 [2020-12-23 06:58:17,518 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 06:58:17,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=2860, Invalid=8482, Unknown=0, NotChecked=0, Total=11342 [2020-12-23 06:58:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 06:58:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-23 06:58:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 06:58:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2020-12-23 06:58:17,532 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 85 [2020-12-23 06:58:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:17,532 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2020-12-23 06:58:17,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 06:58:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2020-12-23 06:58:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 06:58:17,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:17,534 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:17,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:58:17,745 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:17,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1036401860, now seen corresponding path program 12 times [2020-12-23 06:58:17,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:17,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79984337] [2020-12-23 06:58:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:19,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79984337] [2020-12-23 06:58:19,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714176905] [2020-12-23 06:58:19,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:19,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2020-12-23 06:58:19,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:19,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:58:19,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:20,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:20,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 51 [2020-12-23 06:58:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20843408] [2020-12-23 06:58:20,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:58:20,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:58:20,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2443, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:58:20,270 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 51 states. [2020-12-23 06:58:20,475 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 8 [2020-12-23 06:58:20,630 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 8 [2020-12-23 06:58:20,804 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 7 [2020-12-23 06:58:20,986 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-23 06:58:21,165 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-23 06:58:21,338 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-23 06:58:21,512 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-23 06:58:21,697 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-23 06:58:21,878 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-23 06:58:22,052 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-23 06:58:22,232 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-23 06:58:22,410 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 06:58:22,585 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-23 06:58:22,772 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 06:58:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:27,801 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-12-23 06:58:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:58:27,802 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 93 [2020-12-23 06:58:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:27,803 INFO L225 Difference]: With dead ends: 106 [2020-12-23 06:58:27,803 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 06:58:27,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2405, Invalid=6907, Unknown=0, NotChecked=0, Total=9312 [2020-12-23 06:58:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 06:58:27,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-23 06:58:27,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 06:58:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-12-23 06:58:27,819 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 93 [2020-12-23 06:58:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:27,819 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-12-23 06:58:27,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:58:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-12-23 06:58:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 06:58:27,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:27,821 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:28,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:58:28,034 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1225581388, now seen corresponding path program 13 times [2020-12-23 06:58:28,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:28,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317278531] [2020-12-23 06:58:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:30,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317278531] [2020-12-23 06:58:30,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234045968] [2020-12-23 06:58:30,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:58:30,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:31,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:31,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 55 [2020-12-23 06:58:31,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461280676] [2020-12-23 06:58:31,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:58:31,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:31,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:58:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2855, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:58:31,187 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 55 states. [2020-12-23 06:58:31,417 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 8 [2020-12-23 06:58:31,601 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 8 [2020-12-23 06:58:31,793 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 7 [2020-12-23 06:58:31,999 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-23 06:58:32,210 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-23 06:58:32,410 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-23 06:58:32,611 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-23 06:58:32,819 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-23 06:58:33,027 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-23 06:58:33,223 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-23 06:58:33,425 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-23 06:58:33,634 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-23 06:58:33,841 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-23 06:58:34,046 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-23 06:58:34,244 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-23 06:58:34,439 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 06:58:34,645 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-23 06:58:34,853 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 06:58:35,049 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-23 06:58:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:40,608 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-12-23 06:58:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:58:40,610 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 101 [2020-12-23 06:58:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:40,611 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:58:40,611 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 06:58:40,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=2813, Invalid=8107, Unknown=0, NotChecked=0, Total=10920 [2020-12-23 06:58:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 06:58:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-23 06:58:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 06:58:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2020-12-23 06:58:40,621 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 101 [2020-12-23 06:58:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:40,621 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2020-12-23 06:58:40,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:58:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2020-12-23 06:58:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 06:58:40,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:40,623 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:40,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 06:58:40,838 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash -760708652, now seen corresponding path program 14 times [2020-12-23 06:58:40,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:40,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295319027] [2020-12-23 06:58:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:43,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295319027] [2020-12-23 06:58:43,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594491609] [2020-12-23 06:58:43,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:44,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:44,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:44,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:58:44,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:44,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:44,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 59 [2020-12-23 06:58:44,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225028637] [2020-12-23 06:58:44,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:58:44,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:58:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3299, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:58:44,854 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 59 states. [2020-12-23 06:58:45,125 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 8 [2020-12-23 06:58:45,331 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 8 [2020-12-23 06:58:45,567 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 7 [2020-12-23 06:58:45,812 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-23 06:58:46,052 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-23 06:58:46,294 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-23 06:58:46,526 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-23 06:58:46,768 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-23 06:58:47,019 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-23 06:58:47,255 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-23 06:58:47,474 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-23 06:58:47,719 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-23 06:58:47,959 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-23 06:58:48,214 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-23 06:58:48,485 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-23 06:58:48,759 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-23 06:58:49,008 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-23 06:58:49,249 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-23 06:58:49,490 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-23 06:58:49,750 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 06:58:49,979 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-23 06:58:50,209 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 06:58:50,437 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-23 06:58:50,675 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-23 06:58:50,902 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-23 06:58:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:56,921 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2020-12-23 06:58:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:58:56,922 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 109 [2020-12-23 06:58:56,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:56,924 INFO L225 Difference]: With dead ends: 122 [2020-12-23 06:58:56,924 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 06:58:56,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=3253, Invalid=9403, Unknown=0, NotChecked=0, Total=12656 [2020-12-23 06:58:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 06:58:56,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-12-23 06:58:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 06:58:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2020-12-23 06:58:56,933 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 109 [2020-12-23 06:58:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:56,933 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2020-12-23 06:58:56,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:58:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2020-12-23 06:58:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 06:58:56,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:56,935 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:57,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:57,148 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1843324836, now seen corresponding path program 15 times [2020-12-23 06:58:57,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:57,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957207519] [2020-12-23 06:58:57,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:01,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957207519] [2020-12-23 06:59:01,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885617416] [2020-12-23 06:59:01,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:01,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2020-12-23 06:59:01,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:01,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:59:01,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:01,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:01,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 63 [2020-12-23 06:59:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368503494] [2020-12-23 06:59:01,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:59:01,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:59:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=3775, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:59:01,991 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 63 states. [2020-12-23 06:59:02,368 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2020-12-23 06:59:02,609 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 8 [2020-12-23 06:59:02,877 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 7 [2020-12-23 06:59:03,164 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-23 06:59:03,446 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-23 06:59:03,720 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-23 06:59:04,005 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-23 06:59:04,294 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-23 06:59:04,575 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-23 06:59:04,848 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-23 06:59:05,127 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-23 06:59:05,409 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-23 06:59:05,701 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-23 06:59:05,991 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-23 06:59:06,278 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-23 06:59:06,569 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-23 06:59:06,847 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-23 06:59:07,124 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-23 06:59:07,382 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-23 06:59:07,669 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-23 06:59:07,956 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-23 06:59:08,233 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-23 06:59:08,528 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-23 06:59:08,811 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 06:59:09,093 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-23 06:59:09,369 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 06:59:09,666 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-23 06:59:09,935 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-23 06:59:10,210 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-23 06:59:10,738 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-23 06:59:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:17,211 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-12-23 06:59:17,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:59:17,213 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 117 [2020-12-23 06:59:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:17,214 INFO L225 Difference]: With dead ends: 130 [2020-12-23 06:59:17,215 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 06:59:17,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=3725, Invalid=10795, Unknown=0, NotChecked=0, Total=14520 [2020-12-23 06:59:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 06:59:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-12-23 06:59:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 06:59:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2020-12-23 06:59:17,224 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 117 [2020-12-23 06:59:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:17,225 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2020-12-23 06:59:17,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:59:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2020-12-23 06:59:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-23 06:59:17,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:17,226 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:17,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:59:17,440 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash 922658532, now seen corresponding path program 16 times [2020-12-23 06:59:17,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:17,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861932396] [2020-12-23 06:59:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:22,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861932396] [2020-12-23 06:59:22,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730689216] [2020-12-23 06:59:22,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:22,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:22,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:22,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:59:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:23,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:23,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 67 [2020-12-23 06:59:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014887976] [2020-12-23 06:59:23,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:59:23,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:23,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:59:23,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4283, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:59:23,999 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 67 states. [2020-12-23 06:59:24,397 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2020-12-23 06:59:24,686 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2020-12-23 06:59:25,005 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 7 [2020-12-23 06:59:25,342 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2020-12-23 06:59:25,646 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 9 [2020-12-23 06:59:25,978 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-23 06:59:26,298 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-12-23 06:59:26,643 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-23 06:59:26,980 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-23 06:59:27,299 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-23 06:59:27,638 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-23 06:59:27,960 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-23 06:59:28,294 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-23 06:59:28,630 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-23 06:59:28,956 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-23 06:59:29,292 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-23 06:59:29,617 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-23 06:59:29,945 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-23 06:59:30,281 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-23 06:59:30,605 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-23 06:59:30,944 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-23 06:59:31,219 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-23 06:59:31,564 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-23 06:59:31,890 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-23 06:59:32,221 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-23 06:59:32,553 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-23 06:59:32,883 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-23 06:59:33,223 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 06:59:33,560 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-23 06:59:33,888 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 06:59:34,216 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-23 06:59:34,543 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-23 06:59:34,866 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-23 06:59:35,195 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-23 06:59:35,509 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-23 06:59:35,827 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-23 06:59:36,128 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-23 06:59:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:43,153 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2020-12-23 06:59:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:59:43,156 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 125 [2020-12-23 06:59:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:43,157 INFO L225 Difference]: With dead ends: 138 [2020-12-23 06:59:43,158 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 06:59:43,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=4229, Invalid=12283, Unknown=0, NotChecked=0, Total=16512 [2020-12-23 06:59:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 06:59:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-12-23 06:59:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 06:59:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2020-12-23 06:59:43,165 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 125 [2020-12-23 06:59:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:43,165 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2020-12-23 06:59:43,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:59:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2020-12-23 06:59:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-23 06:59:43,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:43,166 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:43,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:59:43,367 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1758014828, now seen corresponding path program 17 times [2020-12-23 06:59:43,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:43,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462826957] [2020-12-23 06:59:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:49,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462826957] [2020-12-23 06:59:49,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095921028] [2020-12-23 06:59:49,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:49,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2020-12-23 06:59:49,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:49,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:59:49,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:59,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:59,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 101 [2020-12-23 06:59:59,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129911948] [2020-12-23 06:59:59,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-12-23 06:59:59,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:59,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-12-23 06:59:59,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=9305, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 06:59:59,889 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 101 states. [2020-12-23 07:00:00,561 WARN L197 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2020-12-23 07:00:01,245 WARN L197 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 8 [2020-12-23 07:00:01,955 WARN L197 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 7 [2020-12-23 07:00:02,671 WARN L197 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 9 [2020-12-23 07:00:03,449 WARN L197 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2020-12-23 07:00:04,118 WARN L197 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 9 [2020-12-23 07:00:04,829 WARN L197 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 9 [2020-12-23 07:00:05,566 WARN L197 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 9 [2020-12-23 07:00:06,297 WARN L197 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2020-12-23 07:00:07,008 WARN L197 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 9 [2020-12-23 07:00:07,746 WARN L197 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 9 [2020-12-23 07:00:08,466 WARN L197 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 9 [2020-12-23 07:00:09,197 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2020-12-23 07:00:09,907 WARN L197 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 9 [2020-12-23 07:00:10,623 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 9 [2020-12-23 07:00:11,355 WARN L197 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 9 [2020-12-23 07:00:12,104 WARN L197 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2020-12-23 07:00:12,844 WARN L197 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 9 [2020-12-23 07:00:13,566 WARN L197 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 9 [2020-12-23 07:00:14,283 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 9 [2020-12-23 07:00:15,017 WARN L197 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2020-12-23 07:00:15,743 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 9 [2020-12-23 07:00:16,490 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 9 [2020-12-23 07:00:17,165 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 9 [2020-12-23 07:00:17,807 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2020-12-23 07:00:18,528 WARN L197 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 9 [2020-12-23 07:00:19,250 WARN L197 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2020-12-23 07:00:20,031 WARN L197 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 9 [2020-12-23 07:00:20,773 WARN L197 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2020-12-23 07:00:21,518 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2020-12-23 07:00:22,212 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2020-12-23 07:00:22,938 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 9 [2020-12-23 07:00:23,678 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2020-12-23 07:00:24,401 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2020-12-23 07:00:25,074 WARN L197 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2020-12-23 07:00:25,782 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2020-12-23 07:00:26,489 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-23 07:00:27,168 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-23 07:00:27,839 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-23 07:00:28,500 WARN L197 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-23 07:00:29,146 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-23 07:00:29,745 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-23 07:00:30,352 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-23 07:00:30,959 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-23 07:00:31,547 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-23 07:00:32,115 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-23 07:00:32,678 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-23 07:00:33,225 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 07:00:33,750 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 07:00:34,238 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-23 07:00:34,717 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-23 07:00:35,226 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-23 07:00:35,712 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 9 [2020-12-23 07:00:36,192 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2020-12-23 07:00:36,659 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 9 [2020-12-23 07:00:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:40,975 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2020-12-23 07:00:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 07:00:40,978 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 133 [2020-12-23 07:00:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:40,980 INFO L225 Difference]: With dead ends: 146 [2020-12-23 07:00:40,980 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 07:00:40,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3423 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=6868, Invalid=20854, Unknown=0, NotChecked=0, Total=27722 [2020-12-23 07:00:40,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 07:00:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-12-23 07:00:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-23 07:00:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-12-23 07:00:40,991 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 133 [2020-12-23 07:00:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:40,991 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-12-23 07:00:40,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-12-23 07:00:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-12-23 07:00:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-23 07:00:40,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:40,992 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:41,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:41,194 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:41,194 INFO L82 PathProgramCache]: Analyzing trace with hash -955733004, now seen corresponding path program 18 times [2020-12-23 07:00:41,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:41,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412703654] [2020-12-23 07:00:41,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:49,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412703654] [2020-12-23 07:00:49,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763156427] [2020-12-23 07:00:49,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:50,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2020-12-23 07:00:50,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 07:00:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:51,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:51,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 75 [2020-12-23 07:00:51,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918159063] [2020-12-23 07:00:51,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 07:00:51,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:51,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 07:00:51,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=5395, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 07:00:51,768 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 75 states. [2020-12-23 07:00:52,310 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2020-12-23 07:00:52,719 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 8 [2020-12-23 07:00:53,156 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 7 [2020-12-23 07:00:53,618 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2020-12-23 07:00:54,079 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 9 [2020-12-23 07:00:54,535 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2020-12-23 07:00:54,992 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 9 [2020-12-23 07:00:55,437 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2020-12-23 07:00:55,890 WARN L197 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 9 [2020-12-23 07:00:56,347 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2020-12-23 07:00:56,803 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 9 [2020-12-23 07:00:57,258 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2020-12-23 07:00:57,734 WARN L197 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 9 [2020-12-23 07:00:58,176 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-23 07:00:58,617 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-12-23 07:00:59,064 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-23 07:00:59,521 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-23 07:00:59,988 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-23 07:01:00,453 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-23 07:01:00,905 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-23 07:01:01,355 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-23 07:01:01,802 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-23 07:01:02,266 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-23 07:01:02,758 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-23 07:01:03,197 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-23 07:01:03,648 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-23 07:01:04,107 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9 [2020-12-23 07:01:04,545 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 9 [2020-12-23 07:01:04,994 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 9 [2020-12-23 07:01:05,433 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 9 [2020-12-23 07:01:05,886 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 9 [2020-12-23 07:01:06,327 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 9 [2020-12-23 07:01:06,757 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 9 [2020-12-23 07:01:07,217 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 9 [2020-12-23 07:01:07,662 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 9 [2020-12-23 07:01:08,111 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 9 [2020-12-23 07:01:08,559 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 9 [2020-12-23 07:01:08,976 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 9 [2020-12-23 07:01:09,417 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 9 [2020-12-23 07:01:09,860 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 9 [2020-12-23 07:01:10,302 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 9 [2020-12-23 07:01:10,745 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 9 [2020-12-23 07:01:11,154 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 9 [2020-12-23 07:01:11,558 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 9 [2020-12-23 07:01:11,979 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 9 [2020-12-23 07:01:12,398 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 9 [2020-12-23 07:01:12,833 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 9 [2020-12-23 07:01:13,237 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2020-12-23 07:01:13,618 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 9 [2020-12-23 07:01:14,037 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 9 [2020-12-23 07:01:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:21,347 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2020-12-23 07:01:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 07:01:21,350 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 141 [2020-12-23 07:01:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:21,352 INFO L225 Difference]: With dead ends: 154 [2020-12-23 07:01:21,352 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 07:01:21,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=5333, Invalid=15547, Unknown=0, NotChecked=0, Total=20880 [2020-12-23 07:01:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 07:01:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-12-23 07:01:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 07:01:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2020-12-23 07:01:21,362 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 141 [2020-12-23 07:01:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:21,363 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2020-12-23 07:01:21,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 07:01:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2020-12-23 07:01:21,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-23 07:01:21,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:21,364 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:21,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:21,574 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash -381345156, now seen corresponding path program 19 times [2020-12-23 07:01:21,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:21,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434979932] [2020-12-23 07:01:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:31,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434979932] [2020-12-23 07:01:31,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948036565] [2020-12-23 07:01:31,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:01:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 07:01:31,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:33,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:33,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 79 [2020-12-23 07:01:33,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071852009] [2020-12-23 07:01:33,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 07:01:33,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:33,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 07:01:33,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=5999, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 07:01:33,499 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 79 states. [2020-12-23 07:01:34,093 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2020-12-23 07:01:34,535 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 8 [2020-12-23 07:01:34,993 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 7 [2020-12-23 07:01:35,501 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2020-12-23 07:01:36,001 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 9 [2020-12-23 07:01:36,487 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2020-12-23 07:01:36,971 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2020-12-23 07:01:37,462 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 9 [2020-12-23 07:01:37,961 WARN L197 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 9 [2020-12-23 07:01:38,460 WARN L197 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2020-12-23 07:01:38,989 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 9 [2020-12-23 07:01:39,460 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 9 [2020-12-23 07:01:39,951 WARN L197 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 9 [2020-12-23 07:01:40,428 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2020-12-23 07:01:40,925 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 9 [2020-12-23 07:01:41,404 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2020-12-23 07:01:41,884 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 9 [2020-12-23 07:01:42,375 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2020-12-23 07:01:42,872 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2020-12-23 07:01:43,356 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 9 [2020-12-23 07:01:43,858 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 9 [2020-12-23 07:01:44,371 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2020-12-23 07:01:44,860 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 9 [2020-12-23 07:01:45,374 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 9 [2020-12-23 07:01:45,866 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2020-12-23 07:01:46,370 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2020-12-23 07:01:46,860 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 9 [2020-12-23 07:01:47,375 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2020-12-23 07:01:47,884 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 9 [2020-12-23 07:01:48,384 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 9 [2020-12-23 07:01:48,886 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 9