/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-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:26:32,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:26:32,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:26:33,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:26:33,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:26:33,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:26:33,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:26:33,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:26:33,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:26:33,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:26:33,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:26:33,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:26:33,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:26:33,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:26:33,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:26:33,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:26:33,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:26:33,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:26:33,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:26:33,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:26:33,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:26:33,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:26:33,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:26:33,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:26:33,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 04:26:33,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 04:26:33,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 04:26:33,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 04:26:33,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 04:26:33,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 04:26:33,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:26:33,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:26:33,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:26:33,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:26:33,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:26:33,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:26:33,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:26:33,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:26:33,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:26:33,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:26:33,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:26:33,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:26:33,149 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:26:33,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:26:33,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:26:33,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:26:33,151 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:26:33,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:26:33,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:26:33,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:26:33,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:26:33,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:26:33,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:26:33,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:26:33,153 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:26:33,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:26:33,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:26:33,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:26:33,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:26:33,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:26:33,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:26:33,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:26:33,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:26:33,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:26:33,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:26:33,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:26:33,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:26:33,157 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:26:33,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:26:33,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:26:33,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:26:33,536 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:26:33,537 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:26:33,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-2.c [2020-12-22 04:26:33,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33af0db23/71795b74a7e14937b32a326f81404f95/FLAGd933039d6 [2020-12-22 04:26:34,173 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:26:34,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c [2020-12-22 04:26:34,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33af0db23/71795b74a7e14937b32a326f81404f95/FLAGd933039d6 [2020-12-22 04:26:34,525 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33af0db23/71795b74a7e14937b32a326f81404f95 [2020-12-22 04:26:34,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:26:34,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:26:34,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:34,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:26:34,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:26:34,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d309881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34, skipping insertion in model container [2020-12-22 04:26:34,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:26:34,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:26:34,709 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2020-12-22 04:26:34,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:34,731 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:26:34,745 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c[322,335] [2020-12-22 04:26:34,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:26:34,764 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:26:34,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34 WrapperNode [2020-12-22 04:26:34,765 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:26:34,766 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:34,766 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:26:34,766 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:26:34,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:26:34,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:26:34,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:26:34,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:26:34,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... [2020-12-22 04:26:34,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:26:34,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:26:34,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:26:34,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:26:34,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:26:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:26:34,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:26:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:26:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:26:35,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:26:35,320 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:26:35,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:35 BoogieIcfgContainer [2020-12-22 04:26:35,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:26:35,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:26:35,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:26:35,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:26:35,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:26:34" (1/3) ... [2020-12-22 04:26:35,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c598f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:35, skipping insertion in model container [2020-12-22 04:26:35,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:26:34" (2/3) ... [2020-12-22 04:26:35,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c598f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:26:35, skipping insertion in model container [2020-12-22 04:26:35,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:26:35" (3/3) ... [2020-12-22 04:26:35,335 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2020-12-22 04:26:35,343 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:26:35,348 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:26:35,369 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:26:35,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:26:35,416 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:26:35,417 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:26:35,417 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:26:35,417 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:26:35,417 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:26:35,417 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:26:35,418 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:26:35,438 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:26:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:26:35,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:35,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:26:35,446 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2020-12-22 04:26:35,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:35,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320345537] [2020-12-22 04:26:35,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:35,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320345537] [2020-12-22 04:26:35,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:35,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:26:35,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154435149] [2020-12-22 04:26:35,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:26:35,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:35,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:26:35,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:26:35,671 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-22 04:26:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:35,686 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-22 04:26:35,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:26:35,687 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-22 04:26:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:35,696 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:26:35,696 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:26:35,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:26:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:26:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:26:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:26:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-22 04:26:35,739 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-12-22 04:26:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:35,739 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-22 04:26:35,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:26:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-12-22 04:26:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:26:35,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:35,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:26:35,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:26:35,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2020-12-22 04:26:35,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:35,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052157260] [2020-12-22 04:26:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:35,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052157260] [2020-12-22 04:26:35,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:26:35,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:26:35,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062542352] [2020-12-22 04:26:35,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:35,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:35,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:35,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:35,830 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 3 states. [2020-12-22 04:26:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:35,852 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-12-22 04:26:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:35,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:26:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:35,854 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:26:35,854 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:26:35,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:26:35,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:26:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:26:35,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:26:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-22 04:26:35,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-22 04:26:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:35,859 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-22 04:26:35,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:35,859 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-22 04:26:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:26:35,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:35,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:35,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:26:35,860 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2020-12-22 04:26:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:35,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055236468] [2020-12-22 04:26:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:35,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055236468] [2020-12-22 04:26:35,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705175743] [2020-12-22 04:26:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:26:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:36,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:36,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:26:36,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435747862] [2020-12-22 04:26:36,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:26:36,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:36,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:26:36,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:26:36,078 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 5 states. [2020-12-22 04:26:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:36,117 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2020-12-22 04:26:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:26:36,118 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 04:26:36,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:36,119 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:26:36,119 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:26:36,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:26:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:26:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:26:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:26:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-22 04:26:36,123 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-22 04:26:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:36,124 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-22 04:26:36,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:26:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-22 04:26:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:26:36,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:36,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:36,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 04:26:36,337 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:36,338 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 2 times [2020-12-22 04:26:36,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:36,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950612722] [2020-12-22 04:26:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:36,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950612722] [2020-12-22 04:26:36,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375310425] [2020-12-22 04:26:36,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:36,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:36,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:36,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:26:36,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:36,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:36,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:26:36,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036556011] [2020-12-22 04:26:36,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:26:36,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:36,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:26:36,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:26:36,644 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-22 04:26:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:36,700 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:26:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:26:36,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:26:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:36,704 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:26:36,704 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:26:36,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:26:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:26:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:26:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:26:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 04:26:36,716 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-12-22 04:26:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:36,716 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 04:26:36,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:26:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 04:26:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:26:36,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:36,717 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:36,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:36,918 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:36,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:36,919 INFO L82 PathProgramCache]: Analyzing trace with hash 570787482, now seen corresponding path program 3 times [2020-12-22 04:26:36,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:36,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870561448] [2020-12-22 04:26:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870561448] [2020-12-22 04:26:37,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590696385] [2020-12-22 04:26:37,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:37,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:26:37,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:26:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 04:26:37,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:26:37,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-12-22 04:26:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939486727] [2020-12-22 04:26:37,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:26:37,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:26:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:37,162 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-12-22 04:26:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:37,186 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-22 04:26:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:26:37,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 04:26:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:37,188 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:26:37,188 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:26:37,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:26:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-22 04:26:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:26:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-22 04:26:37,197 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-12-22 04:26:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:37,198 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-22 04:26:37,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:26:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-22 04:26:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:26:37,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:37,201 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:37,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:37,403 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1176853889, now seen corresponding path program 1 times [2020-12-22 04:26:37,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:37,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921247949] [2020-12-22 04:26:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:37,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921247949] [2020-12-22 04:26:37,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880543053] [2020-12-22 04:26:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:26:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:37,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:37,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:26:37,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524621071] [2020-12-22 04:26:37,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:26:37,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:37,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:26:37,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:37,667 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-22 04:26:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:37,745 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-22 04:26:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:26:37,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 04:26:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:37,755 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:26:37,755 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:26:37,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:26:37,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:26:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:26:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:26:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 04:26:37,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-12-22 04:26:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:37,766 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 04:26:37,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:26:37,768 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 04:26:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:26:37,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:37,769 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:37,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:37,984 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:37,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1191961250, now seen corresponding path program 2 times [2020-12-22 04:26:37,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:37,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403184068] [2020-12-22 04:26:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:38,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:38,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403184068] [2020-12-22 04:26:38,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573257027] [2020-12-22 04:26:38,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:38,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:26:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:38,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:38,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-22 04:26:38,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994262372] [2020-12-22 04:26:38,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:26:38,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:38,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:26:38,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:38,277 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2020-12-22 04:26:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:38,363 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-22 04:26:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:26:38,364 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-22 04:26:38,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:38,364 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:26:38,364 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:26:38,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:26:38,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:26:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:26:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:26:38,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-22 04:26:38,370 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-12-22 04:26:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:38,370 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-22 04:26:38,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:26:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-22 04:26:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:26:38,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:38,371 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:38,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 04:26:38,585 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:38,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1290642949, now seen corresponding path program 3 times [2020-12-22 04:26:38,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:38,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004965839] [2020-12-22 04:26:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004965839] [2020-12-22 04:26:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528850960] [2020-12-22 04:26:38,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:38,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:26:38,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:38,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:26:38,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 04:26:38,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:38,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-22 04:26:38,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724499975] [2020-12-22 04:26:38,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:26:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:38,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:26:38,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:38,842 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2020-12-22 04:26:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:39,044 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-12-22 04:26:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:26:39,045 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-22 04:26:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:39,046 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:26:39,046 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:26:39,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:26:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:26:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-12-22 04:26:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:26:39,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-22 04:26:39,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-12-22 04:26:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:39,057 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-22 04:26:39,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:26:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-22 04:26:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:26:39,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:39,060 INFO L422 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:39,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:39,261 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:39,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:39,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 4 times [2020-12-22 04:26:39,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:39,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897454569] [2020-12-22 04:26:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:39,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897454569] [2020-12-22 04:26:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274328708] [2020-12-22 04:26:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:39,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:39,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:39,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:26:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:39,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:39,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:26:39,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340621050] [2020-12-22 04:26:39,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:26:39,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:26:39,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:39,573 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-12-22 04:26:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:39,692 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-22 04:26:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:26:39,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-22 04:26:39,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:39,698 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:26:39,698 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:26:39,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:26:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:26:39,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 04:26:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:26:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-12-22 04:26:39,708 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-12-22 04:26:39,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:39,709 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-12-22 04:26:39,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:26:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-12-22 04:26:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:26:39,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:39,710 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:39,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:39,925 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:39,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:39,926 INFO L82 PathProgramCache]: Analyzing trace with hash -415213008, now seen corresponding path program 5 times [2020-12-22 04:26:39,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:39,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833227247] [2020-12-22 04:26:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:40,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833227247] [2020-12-22 04:26:40,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690928260] [2020-12-22 04:26:40,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:40,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:26:40,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:40,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:26:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:40,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:40,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:26:40,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126300506] [2020-12-22 04:26:40,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:26:40,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:40,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:26:40,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:40,336 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 11 states. [2020-12-22 04:26:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:40,451 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-22 04:26:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:26:40,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-22 04:26:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:40,453 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:26:40,453 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:26:40,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:26:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:26:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 04:26:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:26:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-12-22 04:26:40,458 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2020-12-22 04:26:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:40,458 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-12-22 04:26:40,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:26:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-12-22 04:26:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:26:40,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:40,459 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:40,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:26:40,665 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:40,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:40,667 INFO L82 PathProgramCache]: Analyzing trace with hash -215610733, now seen corresponding path program 6 times [2020-12-22 04:26:40,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:40,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049371373] [2020-12-22 04:26:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:40,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049371373] [2020-12-22 04:26:40,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576283880] [2020-12-22 04:26:40,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:40,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 04:26:40,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:40,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:26:40,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:41,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:41,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2020-12-22 04:26:41,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612537476] [2020-12-22 04:26:41,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:26:41,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:41,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:26:41,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:26:41,089 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 14 states. [2020-12-22 04:26:41,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:41,241 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-12-22 04:26:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:26:41,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-22 04:26:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:41,243 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:26:41,243 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:26:41,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:26:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:26:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:26:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:26:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-12-22 04:26:41,248 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2020-12-22 04:26:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:41,248 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-12-22 04:26:41,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:26:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-12-22 04:26:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:26:41,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:41,249 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:41,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:41,456 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:41,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1671352778, now seen corresponding path program 7 times [2020-12-22 04:26:41,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:41,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975470618] [2020-12-22 04:26:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975470618] [2020-12-22 04:26:41,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447804192] [2020-12-22 04:26:41,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:41,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:26:41,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:41,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:41,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:26:41,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253755152] [2020-12-22 04:26:41,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:26:41,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:41,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:26:41,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:41,802 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 13 states. [2020-12-22 04:26:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:41,965 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-22 04:26:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:26:41,966 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-22 04:26:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:41,967 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:26:41,967 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:26:41,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:26:41,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:26:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 04:26:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:26:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-12-22 04:26:41,972 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2020-12-22 04:26:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:41,972 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-12-22 04:26:41,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:26:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-12-22 04:26:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:26:41,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:41,973 INFO L422 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:42,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:42,188 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -480119527, now seen corresponding path program 8 times [2020-12-22 04:26:42,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:42,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416442589] [2020-12-22 04:26:42,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:42,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416442589] [2020-12-22 04:26:42,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590566002] [2020-12-22 04:26:42,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:42,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:42,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:26:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:42,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:42,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 16 [2020-12-22 04:26:42,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545486999] [2020-12-22 04:26:42,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:26:42,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:42,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:26:42,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:42,587 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 16 states. [2020-12-22 04:26:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:42,807 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-12-22 04:26:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:26:42,808 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-22 04:26:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:42,809 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:26:42,809 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:26:42,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:42,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:26:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 04:26:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:26:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-12-22 04:26:42,814 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2020-12-22 04:26:42,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:42,814 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-12-22 04:26:42,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:26:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-12-22 04:26:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:26:42,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:42,815 INFO L422 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:43,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:26:43,029 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:43,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1833733948, now seen corresponding path program 9 times [2020-12-22 04:26:43,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:43,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190399206] [2020-12-22 04:26:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:26:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190399206] [2020-12-22 04:26:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617819805] [2020-12-22 04:26:43,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:43,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:26:43,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:43,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:26:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-22 04:26:43,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:43,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2020-12-22 04:26:43,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425891870] [2020-12-22 04:26:43,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:26:43,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:43,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:26:43,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:26:43,401 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 17 states. [2020-12-22 04:26:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:43,814 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-12-22 04:26:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:26:43,815 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-22 04:26:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:43,817 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:26:43,818 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:26:43,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:26:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:26:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-22 04:26:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:26:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-12-22 04:26:43,824 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2020-12-22 04:26:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:43,825 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-12-22 04:26:43,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:26:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-12-22 04:26:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:26:43,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:43,826 INFO L422 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:44,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:26:44,040 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:44,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1350359876, now seen corresponding path program 10 times [2020-12-22 04:26:44,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:44,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704059614] [2020-12-22 04:26:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:44,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704059614] [2020-12-22 04:26:44,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843567865] [2020-12-22 04:26:44,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:44,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:44,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:44,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:26:44,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:44,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:44,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 04:26:44,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23424416] [2020-12-22 04:26:44,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:26:44,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:26:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:44,453 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 16 states. [2020-12-22 04:26:44,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:44,667 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-12-22 04:26:44,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:26:44,667 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-12-22 04:26:44,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:44,668 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:26:44,668 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:26:44,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:26:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:26:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 04:26:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:26:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-12-22 04:26:44,674 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2020-12-22 04:26:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:44,674 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-12-22 04:26:44,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:26:44,674 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-12-22 04:26:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:26:44,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:44,675 INFO L422 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:44,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:26:44,889 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash -33157337, now seen corresponding path program 11 times [2020-12-22 04:26:44,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:44,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078781249] [2020-12-22 04:26:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:45,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078781249] [2020-12-22 04:26:45,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176295611] [2020-12-22 04:26:45,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:45,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 04:26:45,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:26:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:45,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:45,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:26:45,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410933031] [2020-12-22 04:26:45,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:26:45,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:26:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:26:45,701 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 17 states. [2020-12-22 04:26:45,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:45,991 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-12-22 04:26:45,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:26:45,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-12-22 04:26:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:45,992 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:26:45,992 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:26:45,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:26:45,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:26:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 04:26:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:26:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-12-22 04:26:46,003 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2020-12-22 04:26:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:46,004 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-12-22 04:26:46,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:26:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-12-22 04:26:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:26:46,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:46,010 INFO L422 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:46,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:46,216 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:46,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1846662730, now seen corresponding path program 12 times [2020-12-22 04:26:46,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:46,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905416401] [2020-12-22 04:26:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:26:46,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905416401] [2020-12-22 04:26:46,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138439016] [2020-12-22 04:26:46,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:46,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-22 04:26:46,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:26:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 9 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-12-22 04:26:46,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:46,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2020-12-22 04:26:46,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080344658] [2020-12-22 04:26:46,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:26:46,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:26:46,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:26:46,948 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 21 states. [2020-12-22 04:26:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:47,595 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-12-22 04:26:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:26:47,596 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-22 04:26:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:47,596 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:26:47,596 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:26:47,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:26:47,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:26:47,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-12-22 04:26:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:26:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-12-22 04:26:47,609 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2020-12-22 04:26:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:47,609 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-12-22 04:26:47,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:26:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-12-22 04:26:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:26:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:47,610 INFO L422 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:47,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:26:47,817 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1664138286, now seen corresponding path program 13 times [2020-12-22 04:26:47,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:47,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052541234] [2020-12-22 04:26:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:26:48,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052541234] [2020-12-22 04:26:48,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248529338] [2020-12-22 04:26:48,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:48,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:26:48,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:26:48,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:48,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:26:48,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8388135] [2020-12-22 04:26:48,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:26:48,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:48,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:26:48,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:26:48,280 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 19 states. [2020-12-22 04:26:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:48,650 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2020-12-22 04:26:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:26:48,650 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-12-22 04:26:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:48,651 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:26:48,651 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:26:48,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:26:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:26:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:26:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:26:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-12-22 04:26:48,656 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-12-22 04:26:48,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:48,656 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-12-22 04:26:48,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:26:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-12-22 04:26:48,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:26:48,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:48,657 INFO L422 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:48,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:26:48,862 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:48,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:48,863 INFO L82 PathProgramCache]: Analyzing trace with hash -870062923, now seen corresponding path program 14 times [2020-12-22 04:26:48,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:48,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282625465] [2020-12-22 04:26:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:26:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282625465] [2020-12-22 04:26:49,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991444850] [2020-12-22 04:26:49,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:49,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:26:49,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:26:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:26:49,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:49,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2020-12-22 04:26:49,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964890105] [2020-12-22 04:26:49,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:26:49,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:49,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:26:49,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:26:49,459 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-12-22 04:26:49,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:49,980 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-12-22 04:26:49,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:26:49,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-22 04:26:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:49,981 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:26:49,981 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:26:49,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:26:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:26:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 04:26:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:26:49,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-12-22 04:26:49,988 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-12-22 04:26:49,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:49,988 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-12-22 04:26:49,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:26:49,989 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-12-22 04:26:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:26:49,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:49,989 INFO L422 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:50,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:50,204 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2027149528, now seen corresponding path program 15 times [2020-12-22 04:26:50,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:50,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331455554] [2020-12-22 04:26:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 04:26:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331455554] [2020-12-22 04:26:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499869233] [2020-12-22 04:26:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:50,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:26:50,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:50,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:26:50,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 16 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-12-22 04:26:50,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:50,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2020-12-22 04:26:50,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25941443] [2020-12-22 04:26:50,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:26:50,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:50,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:26:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:26:50,911 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2020-12-22 04:26:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:51,793 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-12-22 04:26:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:26:51,794 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-22 04:26:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:51,794 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:26:51,794 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:26:51,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:26:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:26:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-12-22 04:26:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:26:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-12-22 04:26:51,800 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2020-12-22 04:26:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:51,800 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-12-22 04:26:51,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:26:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-12-22 04:26:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:26:51,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:51,801 INFO L422 BasicCegarLoop]: trace histogram [23, 18, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:52,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:52,011 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1008695328, now seen corresponding path program 16 times [2020-12-22 04:26:52,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:52,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575468271] [2020-12-22 04:26:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:52,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575468271] [2020-12-22 04:26:52,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135974585] [2020-12-22 04:26:52,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:52,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:26:52,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:52,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:26:52,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 171 proven. 342 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:52,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:52,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:26:52,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180553552] [2020-12-22 04:26:52,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:26:52,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:52,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:26:52,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:26:52,613 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 22 states. [2020-12-22 04:26:53,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:53,142 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2020-12-22 04:26:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:26:53,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-12-22 04:26:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:53,144 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:26:53,144 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:26:53,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:26:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:26:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 04:26:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:26:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-12-22 04:26:53,150 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2020-12-22 04:26:53,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:53,150 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-12-22 04:26:53,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:26:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-12-22 04:26:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:26:53,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:53,151 INFO L422 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:53,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:53,355 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:53,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:53,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1656515133, now seen corresponding path program 17 times [2020-12-22 04:26:53,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:53,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490947264] [2020-12-22 04:26:53,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:53,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490947264] [2020-12-22 04:26:53,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461080435] [2020-12-22 04:26:53,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:54,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:26:54,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:54,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 04:26:54,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:55,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:55,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:26:55,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64380675] [2020-12-22 04:26:55,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:26:55,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:55,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:26:55,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:26:55,440 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 23 states. [2020-12-22 04:26:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:56,106 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-12-22 04:26:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:26:56,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-22 04:26:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:56,110 INFO L225 Difference]: With dead ends: 72 [2020-12-22 04:26:56,110 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:26:56,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 21 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:26:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:26:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 04:26:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:26:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-12-22 04:26:56,115 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2020-12-22 04:26:56,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:56,115 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-12-22 04:26:56,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:26:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-12-22 04:26:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:26:56,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:56,116 INFO L422 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:26:56,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:26:56,317 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:26:56,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:26:56,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1441089818, now seen corresponding path program 18 times [2020-12-22 04:26:56,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:26:56,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24716266] [2020-12-22 04:26:56,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:26:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:26:56,764 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 04:26:56,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24716266] [2020-12-22 04:26:56,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519641451] [2020-12-22 04:26:56,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:26:57,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2020-12-22 04:26:57,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:26:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:26:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:26:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 220 proven. 25 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-12-22 04:26:58,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:26:58,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2020-12-22 04:26:58,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34846229] [2020-12-22 04:26:58,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:26:58,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:26:58,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:26:58,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:26:58,404 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 29 states. [2020-12-22 04:26:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:26:59,876 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-12-22 04:26:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:26:59,876 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-22 04:26:59,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:26:59,877 INFO L225 Difference]: With dead ends: 77 [2020-12-22 04:26:59,877 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:26:59,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:26:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:26:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 04:26:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:26:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-12-22 04:26:59,883 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 56 [2020-12-22 04:26:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:26:59,883 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-12-22 04:26:59,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:26:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-12-22 04:26:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:26:59,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:26:59,884 INFO L422 BasicCegarLoop]: trace histogram [27, 21, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:00,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:27:00,088 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash 766560110, now seen corresponding path program 19 times [2020-12-22 04:27:00,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:00,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737036546] [2020-12-22 04:27:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:27:00,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737036546] [2020-12-22 04:27:00,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951096664] [2020-12-22 04:27:00,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:00,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:27:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 242 proven. 462 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:27:00,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:00,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:27:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471516067] [2020-12-22 04:27:00,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:27:00,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:27:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:27:00,818 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-12-22 04:27:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:01,497 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-12-22 04:27:01,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:27:01,497 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-12-22 04:27:01,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:01,498 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:27:01,498 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:27:01,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:27:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:27:01,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 04:27:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:27:01,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-12-22 04:27:01,504 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-12-22 04:27:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:01,504 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-12-22 04:27:01,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:27:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-12-22 04:27:01,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:27:01,505 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:01,505 INFO L422 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:01,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:01,721 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:01,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:01,722 INFO L82 PathProgramCache]: Analyzing trace with hash -429571503, now seen corresponding path program 20 times [2020-12-22 04:27:01,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:01,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526321181] [2020-12-22 04:27:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:01,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:27:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526321181] [2020-12-22 04:27:02,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607588534] [2020-12-22 04:27:02,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:02,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:02,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:02,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:27:02,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:02,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:02,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 32 [2020-12-22 04:27:02,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765565391] [2020-12-22 04:27:02,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:27:02,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:02,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:27:02,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:27:02,676 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 32 states. [2020-12-22 04:27:03,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:03,645 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2020-12-22 04:27:03,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:27:03,645 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-22 04:27:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:03,646 INFO L225 Difference]: With dead ends: 84 [2020-12-22 04:27:03,646 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:27:03,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:27:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:27:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 04:27:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:27:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-12-22 04:27:03,651 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-12-22 04:27:03,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:03,651 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-12-22 04:27:03,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:27:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-12-22 04:27:03,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:27:03,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:03,652 INFO L422 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:03,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:27:03,865 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1139183732, now seen corresponding path program 21 times [2020-12-22 04:27:03,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:03,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427115013] [2020-12-22 04:27:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 04:27:04,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427115013] [2020-12-22 04:27:04,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934512676] [2020-12-22 04:27:04,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:04,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 04:27:04,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:04,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:27:04,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 299 proven. 36 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-12-22 04:27:05,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:05,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2020-12-22 04:27:05,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760822571] [2020-12-22 04:27:05,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:27:05,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:05,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:27:05,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:27:05,652 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 33 states. [2020-12-22 04:27:08,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:08,103 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-12-22 04:27:08,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:27:08,104 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-22 04:27:08,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:08,104 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:27:08,104 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:27:08,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:27:08,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:27:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-12-22 04:27:08,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 04:27:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-12-22 04:27:08,109 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2020-12-22 04:27:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:08,110 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-12-22 04:27:08,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:27:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-12-22 04:27:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:27:08,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:08,111 INFO L422 BasicCegarLoop]: trace histogram [31, 24, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:08,314 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:08,315 INFO L82 PathProgramCache]: Analyzing trace with hash -373808516, now seen corresponding path program 22 times [2020-12-22 04:27:08,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:08,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719201954] [2020-12-22 04:27:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:08,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719201954] [2020-12-22 04:27:08,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918582655] [2020-12-22 04:27:08,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:09,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:09,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:27:09,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 325 proven. 600 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:09,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:09,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:27:09,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904981023] [2020-12-22 04:27:09,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:27:09,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:09,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:27:09,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:27:09,199 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2020-12-22 04:27:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:10,172 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2020-12-22 04:27:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:27:10,173 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 68 [2020-12-22 04:27:10,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:10,174 INFO L225 Difference]: With dead ends: 92 [2020-12-22 04:27:10,174 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 04:27:10,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:27:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 04:27:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 04:27:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 04:27:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-12-22 04:27:10,180 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-12-22 04:27:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:10,180 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-12-22 04:27:10,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:27:10,180 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-12-22 04:27:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:27:10,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:10,181 INFO L422 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:10,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:27:10,395 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:10,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1006564769, now seen corresponding path program 23 times [2020-12-22 04:27:10,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:10,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772050818] [2020-12-22 04:27:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:11,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772050818] [2020-12-22 04:27:11,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934161296] [2020-12-22 04:27:11,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:14,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-22 04:27:14,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 04:27:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:15,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:15,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:27:15,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673966212] [2020-12-22 04:27:15,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:27:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:15,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:27:15,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:27:15,631 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-12-22 04:27:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:16,621 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2020-12-22 04:27:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:27:16,622 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2020-12-22 04:27:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:16,623 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:27:16,623 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 04:27:16,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 22 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:27:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 04:27:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-22 04:27:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 04:27:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-12-22 04:27:16,628 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 70 [2020-12-22 04:27:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:16,628 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-12-22 04:27:16,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:27:16,628 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-12-22 04:27:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:27:16,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:16,628 INFO L422 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:16,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:27:16,829 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:16,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:16,829 INFO L82 PathProgramCache]: Analyzing trace with hash 800032130, now seen corresponding path program 24 times [2020-12-22 04:27:16,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:16,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463707620] [2020-12-22 04:27:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 04:27:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463707620] [2020-12-22 04:27:17,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208758111] [2020-12-22 04:27:17,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:18,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:27:18,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:18,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:27:18,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 555 proven. 322 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-22 04:27:21,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:21,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20] total 47 [2020-12-22 04:27:21,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57754445] [2020-12-22 04:27:21,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:27:21,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:27:21,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=1770, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:27:21,964 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 47 states. [2020-12-22 04:27:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:24,144 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2020-12-22 04:27:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:27:24,144 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2020-12-22 04:27:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:24,145 INFO L225 Difference]: With dead ends: 118 [2020-12-22 04:27:24,145 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:27:24,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=421, Invalid=1835, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:27:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:27:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 78. [2020-12-22 04:27:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:27:24,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-12-22 04:27:24,152 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2020-12-22 04:27:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:24,152 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-12-22 04:27:24,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:27:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-12-22 04:27:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:27:24,152 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:24,153 INFO L422 BasicCegarLoop]: trace histogram [35, 27, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:24,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:27:24,354 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:24,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1327056630, now seen corresponding path program 25 times [2020-12-22 04:27:24,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:24,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55657682] [2020-12-22 04:27:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:25,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55657682] [2020-12-22 04:27:25,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217870303] [2020-12-22 04:27:25,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:25,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:27:25,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 420 proven. 756 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:25,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:25,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:27:25,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763199722] [2020-12-22 04:27:25,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:27:25,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:27:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:27:25,458 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 31 states. [2020-12-22 04:27:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:26,668 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2020-12-22 04:27:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:27:26,669 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-12-22 04:27:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:26,671 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:27:26,671 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 04:27:26,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:27:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 04:27:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-22 04:27:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 04:27:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-12-22 04:27:26,677 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 76 [2020-12-22 04:27:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:26,677 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-12-22 04:27:26,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:27:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-12-22 04:27:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:27:26,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:26,678 INFO L422 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:26,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:26,879 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:26,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:26,879 INFO L82 PathProgramCache]: Analyzing trace with hash -66646547, now seen corresponding path program 26 times [2020-12-22 04:27:26,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:26,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492934851] [2020-12-22 04:27:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:27,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492934851] [2020-12-22 04:27:27,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120967633] [2020-12-22 04:27:27,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:27,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:27:27,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:27,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 04:27:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:27:28,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:28,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 39] total 40 [2020-12-22 04:27:28,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477760757] [2020-12-22 04:27:28,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:27:28,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:28,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:27:28,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:27:28,453 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2020-12-22 04:27:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:30,105 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-12-22 04:27:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:27:30,106 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-22 04:27:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:30,107 INFO L225 Difference]: With dead ends: 104 [2020-12-22 04:27:30,107 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 04:27:30,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:27:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 04:27:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 04:27:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:27:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-12-22 04:27:30,113 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2020-12-22 04:27:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:30,114 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-12-22 04:27:30,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:27:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-12-22 04:27:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:27:30,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:30,114 INFO L422 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:30,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 04:27:30,330 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:30,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 6665744, now seen corresponding path program 27 times [2020-12-22 04:27:30,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:30,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824646969] [2020-12-22 04:27:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 04:27:31,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824646969] [2020-12-22 04:27:31,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618122902] [2020-12-22 04:27:31,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:31,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:27:31,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:31,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:27:31,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 357 proven. 592 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-12-22 04:27:33,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:33,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 41 [2020-12-22 04:27:33,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098092831] [2020-12-22 04:27:33,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:27:33,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:27:33,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1504, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:27:33,829 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 41 states. [2020-12-22 04:27:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:37,223 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2020-12-22 04:27:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:27:37,224 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-22 04:27:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:37,225 INFO L225 Difference]: With dead ends: 108 [2020-12-22 04:27:37,225 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 04:27:37,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:27:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 04:27:37,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-22 04:27:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 04:27:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-12-22 04:27:37,234 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2020-12-22 04:27:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:37,234 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-12-22 04:27:37,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:27:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-12-22 04:27:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:27:37,235 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:37,236 INFO L422 BasicCegarLoop]: trace histogram [39, 30, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:37,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:37,439 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:37,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1738844952, now seen corresponding path program 28 times [2020-12-22 04:27:37,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:37,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089083735] [2020-12-22 04:27:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:27:38,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089083735] [2020-12-22 04:27:38,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409634447] [2020-12-22 04:27:38,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:38,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:27:38,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:38,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-22 04:27:38,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:38,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 527 proven. 930 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:27:38,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:38,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:27:38,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75584713] [2020-12-22 04:27:38,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:27:38,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:38,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:27:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:27:38,723 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 34 states. [2020-12-22 04:27:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:40,250 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-12-22 04:27:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:27:40,251 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2020-12-22 04:27:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:40,252 INFO L225 Difference]: With dead ends: 112 [2020-12-22 04:27:40,252 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 04:27:40,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:27:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 04:27:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-12-22 04:27:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 04:27:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-12-22 04:27:40,259 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-12-22 04:27:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:40,260 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-12-22 04:27:40,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:27:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-12-22 04:27:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:27:40,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:40,261 INFO L422 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:40,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:27:40,463 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:40,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2145348859, now seen corresponding path program 29 times [2020-12-22 04:27:40,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:40,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758075313] [2020-12-22 04:27:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:27:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758075313] [2020-12-22 04:27:41,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615379840] [2020-12-22 04:27:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:27:54,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-22 04:27:54,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:27:54,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-22 04:27:54,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:27:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:27:55,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:27:55,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:27:55,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105970804] [2020-12-22 04:27:55,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:27:55,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:27:55,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:27:55,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:27:55,933 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 35 states. [2020-12-22 04:27:57,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:27:57,601 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2020-12-22 04:27:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:27:57,602 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 86 [2020-12-22 04:27:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:27:57,603 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:27:57,603 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 04:27:57,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 27 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:27:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 04:27:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-22 04:27:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 04:27:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-12-22 04:27:57,609 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 86 [2020-12-22 04:27:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:27:57,609 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-12-22 04:27:57,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:27:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-12-22 04:27:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:27:57,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:27:57,610 INFO L422 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:27:57,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:27:57,813 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:27:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:27:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1953579550, now seen corresponding path program 30 times [2020-12-22 04:27:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:27:57,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627561734] [2020-12-22 04:27:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:27:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:27:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 04:27:58,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627561734] [2020-12-22 04:27:58,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117086573] [2020-12-22 04:27:58,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:03,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2020-12-22 04:28:03,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:03,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 109 conjunts are in the unsatisfiable core [2020-12-22 04:28:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 610 proven. 931 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-22 04:28:08,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:08,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29] total 57 [2020-12-22 04:28:08,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865379536] [2020-12-22 04:28:08,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:28:08,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:08,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:28:08,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=2646, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:28:08,193 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 57 states. [2020-12-22 04:28:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:11,537 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2020-12-22 04:28:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 04:28:11,539 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 88 [2020-12-22 04:28:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:11,540 INFO L225 Difference]: With dead ends: 142 [2020-12-22 04:28:11,541 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 04:28:11,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=581, Invalid=2725, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:28:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 04:28:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-12-22 04:28:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 04:28:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-12-22 04:28:11,549 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2020-12-22 04:28:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:11,549 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-12-22 04:28:11,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 04:28:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-12-22 04:28:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:28:11,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:11,550 INFO L422 BasicCegarLoop]: trace histogram [43, 33, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:11,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:28:11,755 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:11,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:11,755 INFO L82 PathProgramCache]: Analyzing trace with hash 533862566, now seen corresponding path program 31 times [2020-12-22 04:28:11,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:11,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121767640] [2020-12-22 04:28:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 646 proven. 1122 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:28:12,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121767640] [2020-12-22 04:28:12,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530102273] [2020-12-22 04:28:12,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:13,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-22 04:28:13,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 646 proven. 1122 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:28:13,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:13,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:28:13,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279968820] [2020-12-22 04:28:13,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:28:13,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:13,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:28:13,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:28:13,296 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 37 states. [2020-12-22 04:28:15,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:15,174 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2020-12-22 04:28:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:28:15,174 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 92 [2020-12-22 04:28:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:15,176 INFO L225 Difference]: With dead ends: 122 [2020-12-22 04:28:15,176 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 04:28:15,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:28:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 04:28:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-22 04:28:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:28:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-12-22 04:28:15,184 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2020-12-22 04:28:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:15,184 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-12-22 04:28:15,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:28:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-12-22 04:28:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:28:15,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:15,185 INFO L422 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:15,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:28:15,398 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:15,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:15,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1852458889, now seen corresponding path program 32 times [2020-12-22 04:28:15,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:15,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258133122] [2020-12-22 04:28:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:28:16,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258133122] [2020-12-22 04:28:16,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501000594] [2020-12-22 04:28:16,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:16,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:28:16,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:28:16,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:28:17,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:17,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 47] total 48 [2020-12-22 04:28:17,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903101041] [2020-12-22 04:28:17,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:28:17,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:17,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:28:17,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:28:17,612 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 48 states. [2020-12-22 04:28:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:20,127 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2020-12-22 04:28:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:28:20,128 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-22 04:28:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:20,129 INFO L225 Difference]: With dead ends: 124 [2020-12-22 04:28:20,130 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 04:28:20,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:28:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 04:28:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-12-22 04:28:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 04:28:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-12-22 04:28:20,137 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 94 [2020-12-22 04:28:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:20,137 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-12-22 04:28:20,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:28:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-12-22 04:28:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:28:20,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:20,138 INFO L422 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:20,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:28:20,339 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2008172972, now seen corresponding path program 33 times [2020-12-22 04:28:20,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:20,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249040397] [2020-12-22 04:28:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-22 04:28:21,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249040397] [2020-12-22 04:28:21,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53834825] [2020-12-22 04:28:21,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:22,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:28:22,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:22,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:28:22,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 100 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-12-22 04:28:25,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:25,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2020-12-22 04:28:25,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958762492] [2020-12-22 04:28:25,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:28:25,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:28:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:28:25,437 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 49 states. [2020-12-22 04:28:31,914 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:28:33,019 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2020-12-22 04:28:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:35,284 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-12-22 04:28:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:28:35,285 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-22 04:28:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:35,286 INFO L225 Difference]: With dead ends: 130 [2020-12-22 04:28:35,286 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:28:35,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=378, Invalid=3162, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:28:35,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:28:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-12-22 04:28:35,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 04:28:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-12-22 04:28:35,296 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 96 [2020-12-22 04:28:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:35,296 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-12-22 04:28:35,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:28:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-12-22 04:28:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 04:28:35,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:35,297 INFO L422 BasicCegarLoop]: trace histogram [47, 36, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:35,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:28:35,498 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:35,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1698225740, now seen corresponding path program 34 times [2020-12-22 04:28:35,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:35,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445237322] [2020-12-22 04:28:35,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:28:36,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445237322] [2020-12-22 04:28:36,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764560589] [2020-12-22 04:28:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:28:36,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:28:36,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:28:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-22 04:28:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:28:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 777 proven. 1332 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:28:37,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:28:37,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:28:37,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510985137] [2020-12-22 04:28:37,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:28:37,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:28:37,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:28:37,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:28:37,305 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 40 states. [2020-12-22 04:28:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:28:39,644 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2020-12-22 04:28:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:28:39,645 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 100 [2020-12-22 04:28:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:28:39,646 INFO L225 Difference]: With dead ends: 132 [2020-12-22 04:28:39,646 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 04:28:39,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:28:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 04:28:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-12-22 04:28:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:28:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-12-22 04:28:39,656 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 100 [2020-12-22 04:28:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:28:39,656 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-12-22 04:28:39,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:28:39,656 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-12-22 04:28:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:28:39,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:28:39,657 INFO L422 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:28:39,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:28:39,865 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:28:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:28:39,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1778401897, now seen corresponding path program 35 times [2020-12-22 04:28:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:28:39,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071681229] [2020-12-22 04:28:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:28:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:28:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:28:41,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071681229] [2020-12-22 04:28:41,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179276280] [2020-12-22 04:28:41,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:31,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2020-12-22 04:29:31,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:31,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-22 04:29:31,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:29:33,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:33,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:29:33,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017041432] [2020-12-22 04:29:33,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:29:33,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:33,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:29:33,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:29:33,797 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 41 states. [2020-12-22 04:29:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:29:36,191 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2020-12-22 04:29:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:29:36,197 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 102 [2020-12-22 04:29:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:29:36,198 INFO L225 Difference]: With dead ends: 134 [2020-12-22 04:29:36,198 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 04:29:36,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 31 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:29:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 04:29:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-12-22 04:29:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 04:29:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-12-22 04:29:36,207 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2020-12-22 04:29:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:29:36,207 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-12-22 04:29:36,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:29:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-12-22 04:29:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:29:36,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:29:36,208 INFO L422 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:29:36,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:29:36,415 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:29:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:29:36,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1518277446, now seen corresponding path program 36 times [2020-12-22 04:29:36,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:29:36,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380384679] [2020-12-22 04:29:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:29:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:29:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 04:29:38,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380384679] [2020-12-22 04:29:38,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936546578] [2020-12-22 04:29:38,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:29:46,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2020-12-22 04:29:46,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:29:46,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 122 conjunts are in the unsatisfiable core [2020-12-22 04:29:46,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:29:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 870 proven. 1397 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-12-22 04:29:55,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:29:55,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 70 [2020-12-22 04:29:55,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137863834] [2020-12-22 04:29:55,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 04:29:55,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:29:55,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 04:29:55,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=3938, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 04:29:55,282 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 70 states. [2020-12-22 04:30:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:03,178 INFO L93 Difference]: Finished difference Result 172 states and 196 transitions. [2020-12-22 04:30:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 04:30:03,180 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 104 [2020-12-22 04:30:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:03,181 INFO L225 Difference]: With dead ends: 172 [2020-12-22 04:30:03,181 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 04:30:03,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 74 SyntacticMatches, 13 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=974, Invalid=5506, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 04:30:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 04:30:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2020-12-22 04:30:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 04:30:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-12-22 04:30:03,191 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 104 [2020-12-22 04:30:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:03,191 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-12-22 04:30:03,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 04:30:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-12-22 04:30:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 04:30:03,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:03,193 INFO L422 BasicCegarLoop]: trace histogram [51, 39, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:03,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:03,398 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:03,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1263789634, now seen corresponding path program 37 times [2020-12-22 04:30:03,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:03,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961693437] [2020-12-22 04:30:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:30:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961693437] [2020-12-22 04:30:05,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069872576] [2020-12-22 04:30:05,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:05,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:30:05,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 920 proven. 1560 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:30:05,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:05,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:30:05,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511639001] [2020-12-22 04:30:05,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:30:05,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:05,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:30:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:30:05,694 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 43 states. [2020-12-22 04:30:08,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:08,790 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2020-12-22 04:30:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:30:08,792 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 108 [2020-12-22 04:30:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:08,793 INFO L225 Difference]: With dead ends: 142 [2020-12-22 04:30:08,793 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 04:30:08,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:30:08,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 04:30:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-22 04:30:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 04:30:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2020-12-22 04:30:08,801 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 108 [2020-12-22 04:30:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:08,801 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2020-12-22 04:30:08,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:30:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2020-12-22 04:30:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 04:30:08,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:08,803 INFO L422 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:09,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:09,016 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:09,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1987047205, now seen corresponding path program 38 times [2020-12-22 04:30:09,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:09,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518636560] [2020-12-22 04:30:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:30:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518636560] [2020-12-22 04:30:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006687709] [2020-12-22 04:30:10,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:10,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:30:10,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:10,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-22 04:30:10,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:30:12,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:12,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 55] total 56 [2020-12-22 04:30:12,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735291380] [2020-12-22 04:30:12,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:30:12,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:12,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:30:12,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:30:12,272 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 56 states. [2020-12-22 04:30:16,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:16,468 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2020-12-22 04:30:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:30:16,469 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-22 04:30:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:16,470 INFO L225 Difference]: With dead ends: 144 [2020-12-22 04:30:16,471 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 04:30:16,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:30:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 04:30:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-12-22 04:30:16,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 04:30:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-12-22 04:30:16,486 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 110 [2020-12-22 04:30:16,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:16,487 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-12-22 04:30:16,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:30:16,487 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-12-22 04:30:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 04:30:16,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:16,488 INFO L422 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:16,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 04:30:16,689 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:16,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1252870984, now seen corresponding path program 39 times [2020-12-22 04:30:16,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:16,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755656486] [2020-12-22 04:30:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 04:30:18,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755656486] [2020-12-22 04:30:18,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640145062] [2020-12-22 04:30:18,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:19,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-22 04:30:19,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:30:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1025 proven. 144 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-12-22 04:30:24,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:24,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2020-12-22 04:30:24,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702084400] [2020-12-22 04:30:24,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:30:24,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:30:24,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:30:24,829 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 57 states. [2020-12-22 04:30:33,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:33,758 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2020-12-22 04:30:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 04:30:33,759 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-12-22 04:30:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:33,760 INFO L225 Difference]: With dead ends: 148 [2020-12-22 04:30:33,760 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 04:30:33,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=236, Invalid=3070, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:30:33,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 04:30:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-12-22 04:30:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 04:30:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-12-22 04:30:33,772 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2020-12-22 04:30:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:33,772 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-12-22 04:30:33,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 04:30:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-12-22 04:30:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 04:30:33,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:33,773 INFO L422 BasicCegarLoop]: trace histogram [55, 42, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:33,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:33,976 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash -675248560, now seen corresponding path program 40 times [2020-12-22 04:30:33,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:33,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761865005] [2020-12-22 04:30:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1075 proven. 1806 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 04:30:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761865005] [2020-12-22 04:30:36,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312477524] [2020-12-22 04:30:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:36,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:30:36,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:30:36,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-22 04:30:36,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:30:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1075 proven. 1806 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 04:30:36,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:30:36,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:30:36,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482540390] [2020-12-22 04:30:36,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:30:36,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:30:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:30:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:30:36,605 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 46 states. [2020-12-22 04:30:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:30:40,414 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2020-12-22 04:30:40,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:30:40,415 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 116 [2020-12-22 04:30:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:30:40,416 INFO L225 Difference]: With dead ends: 152 [2020-12-22 04:30:40,416 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 04:30:40,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:30:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 04:30:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-12-22 04:30:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 04:30:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-12-22 04:30:40,429 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 116 [2020-12-22 04:30:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:30:40,429 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-12-22 04:30:40,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:30:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-12-22 04:30:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 04:30:40,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:30:40,430 INFO L422 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:30:40,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:30:40,631 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:30:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:30:40,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1023214541, now seen corresponding path program 41 times [2020-12-22 04:30:40,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:30:40,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660584045] [2020-12-22 04:30:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:30:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:30:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-12-22 04:30:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660584045] [2020-12-22 04:30:42,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638674627] [2020-12-22 04:30:42,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true