/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/loops-crafted-1/nested5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:45:03,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:45:03,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:45:03,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:45:03,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:45:03,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:45:03,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:45:03,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:45:03,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:45:03,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:45:03,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:45:03,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:45:03,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:45:03,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:45:03,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:45:03,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:45:03,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:45:03,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:45:03,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:45:04,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:45:04,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:45:04,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:45:04,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:45:04,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:45:04,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:45:04,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:45:04,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:45:04,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:45:04,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:45:04,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:45:04,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:45:04,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:45:04,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:45:04,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:45:04,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:45:04,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:45:04,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:45:04,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:45:04,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:45:04,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:45:04,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:45:04,107 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:45:04,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:45:04,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:45:04,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:45:04,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:45:04,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:45:04,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:45:04,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:45:04,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:45:04,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:45:04,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:45:04,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:45:04,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:45:04,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:45:04,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:45:04,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:45:04,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:45:04,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:45:04,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:45:04,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:45:04,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:45:04,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:45:04,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:45:04,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:45:04,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:45:04,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:45:04,591 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:45:04,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested5-2.c [2020-12-22 04:45:04,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60264e572/b0a5b439a9da417a8509dead7728415d/FLAGb522e61a7 [2020-12-22 04:45:05,383 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:45:05,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c [2020-12-22 04:45:05,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60264e572/b0a5b439a9da417a8509dead7728415d/FLAGb522e61a7 [2020-12-22 04:45:05,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60264e572/b0a5b439a9da417a8509dead7728415d [2020-12-22 04:45:05,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:45:05,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:45:05,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:45:05,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:45:05,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:45:05,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:05,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e3ea6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05, skipping insertion in model container [2020-12-22 04:45:05,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:05,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:45:05,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:45:05,936 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/loops-crafted-1/nested5-2.c[321,334] [2020-12-22 04:45:05,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:45:05,962 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:45:05,974 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/loops-crafted-1/nested5-2.c[321,334] [2020-12-22 04:45:05,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:45:05,994 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:45:05,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05 WrapperNode [2020-12-22 04:45:05,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:45:05,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:45:05,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:45:05,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:45:06,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:45:06,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:45:06,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:45:06,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:45:06,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (1/1) ... [2020-12-22 04:45:06,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:45:06,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:45:06,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:45:06,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:45:06,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (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 04:45:06,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:45:06,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:45:06,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:45:06,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:45:06,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:45:06,436 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-22 04:45:06,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:45:06 BoogieIcfgContainer [2020-12-22 04:45:06,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:45:06,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:45:06,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:45:06,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:45:06,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:45:05" (1/3) ... [2020-12-22 04:45:06,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19240654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:45:06, skipping insertion in model container [2020-12-22 04:45:06,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:05" (2/3) ... [2020-12-22 04:45:06,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19240654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:45:06, skipping insertion in model container [2020-12-22 04:45:06,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:45:06" (3/3) ... [2020-12-22 04:45:06,472 INFO L111 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2020-12-22 04:45:06,498 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:45:06,508 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:45:06,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:45:06,570 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:45:06,571 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:45:06,571 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:45:06,571 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:45:06,571 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:45:06,571 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:45:06,572 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:45:06,572 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:45:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-22 04:45:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:45:06,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:06,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:06,599 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:06,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:06,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1296464707, now seen corresponding path program 1 times [2020-12-22 04:45:06,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:06,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577632209] [2020-12-22 04:45:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:06,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:07,066 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 04:45:07,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577632209] [2020-12-22 04:45:07,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:45:07,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:45:07,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323623158] [2020-12-22 04:45:07,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:45:07,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:07,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:45:07,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:45:07,107 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-12-22 04:45:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:07,189 INFO L93 Difference]: Finished difference Result 51 states and 80 transitions. [2020-12-22 04:45:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:45:07,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-22 04:45:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:07,205 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:45:07,206 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:45:07,210 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 04:45:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:45:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2020-12-22 04:45:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:45:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-22 04:45:07,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2020-12-22 04:45:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:07,254 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-22 04:45:07,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:45:07,255 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-22 04:45:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:45:07,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:07,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:07,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:45:07,259 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:07,263 INFO L82 PathProgramCache]: Analyzing trace with hash -308834241, now seen corresponding path program 1 times [2020-12-22 04:45:07,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:07,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227869422] [2020-12-22 04:45:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:07,438 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 04:45:07,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227869422] [2020-12-22 04:45:07,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527769127] [2020-12-22 04:45:07,439 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 04:45:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:07,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:45:07,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:07,539 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 04:45:07,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:07,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:45:07,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966554010] [2020-12-22 04:45:07,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:45:07,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:07,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:45:07,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:45:07,543 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2020-12-22 04:45:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:07,574 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-22 04:45:07,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:45:07,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 04:45:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:07,576 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:45:07,576 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:45:07,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 04:45:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:45:07,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-12-22 04:45:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:45:07,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-22 04:45:07,582 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-22 04:45:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:07,582 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-22 04:45:07,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:45:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-22 04:45:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:45:07,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:07,584 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:07,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 04:45:07,789 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash -383728831, now seen corresponding path program 2 times [2020-12-22 04:45:07,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:07,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171295987] [2020-12-22 04:45:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:07,873 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 04:45:07,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171295987] [2020-12-22 04:45:07,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733468367] [2020-12-22 04:45:07,875 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 04:45:07,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:07,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:45:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:08,016 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 04:45:08,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:08,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:45:08,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424020589] [2020-12-22 04:45:08,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:45:08,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:08,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:45:08,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:45:08,020 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 6 states. [2020-12-22 04:45:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:08,094 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-12-22 04:45:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:45:08,096 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-22 04:45:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:08,097 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:45:08,097 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:45:08,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 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 04:45:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:45:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-12-22 04:45:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:45:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-22 04:45:08,108 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-12-22 04:45:08,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:08,109 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-22 04:45:08,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:45:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-22 04:45:08,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:45:08,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:08,111 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:08,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:08,325 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash 657014211, now seen corresponding path program 3 times [2020-12-22 04:45:08,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:08,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139209281] [2020-12-22 04:45:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:08,432 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 04:45:08,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139209281] [2020-12-22 04:45:08,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184466814] [2020-12-22 04:45:08,433 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 04:45:08,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 04:45:08,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:45:08,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:08,618 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 04:45:08,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:08,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:45:08,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005864163] [2020-12-22 04:45:08,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:45:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:45:08,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:45:08,622 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-12-22 04:45:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:08,692 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-12-22 04:45:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:45:08,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-22 04:45:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:08,693 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:45:08,693 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:45:08,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:45:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:45:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-22 04:45:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:45:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-22 04:45:08,699 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-12-22 04:45:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:08,699 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-22 04:45:08,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:45:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-22 04:45:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:45:08,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:08,701 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:08,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:08,915 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash 83697605, now seen corresponding path program 4 times [2020-12-22 04:45:08,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:08,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108331453] [2020-12-22 04:45:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:09,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108331453] [2020-12-22 04:45:09,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852357633] [2020-12-22 04:45:09,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:09,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:09,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:09,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:45:09,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:09,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:09,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:45:09,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845621186] [2020-12-22 04:45:09,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:45:09,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:09,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:45:09,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:45:09,118 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2020-12-22 04:45:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:09,180 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-12-22 04:45:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:45:09,181 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-22 04:45:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:09,182 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:45:09,182 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:45:09,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:45:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:45:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-12-22 04:45:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:45:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-12-22 04:45:09,188 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-12-22 04:45:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:09,188 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-12-22 04:45:09,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:45:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-12-22 04:45:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:45:09,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:09,190 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:09,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:09,404 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:09,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:09,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1117746873, now seen corresponding path program 5 times [2020-12-22 04:45:09,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:09,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239416254] [2020-12-22 04:45:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:09,523 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 04:45:09,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239416254] [2020-12-22 04:45:09,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544639136] [2020-12-22 04:45:09,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:09,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 04:45:09,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:45:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:09,646 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 04:45:09,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:09,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:45:09,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961348009] [2020-12-22 04:45:09,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:45:09,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:09,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:45:09,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:45:09,649 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-12-22 04:45:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:09,742 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-12-22 04:45:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:45:09,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-22 04:45:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:09,744 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:45:09,744 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:45:09,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:45:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:45:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-12-22 04:45:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:45:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-22 04:45:09,759 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2020-12-22 04:45:09,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:09,759 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-22 04:45:09,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:45:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-22 04:45:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:45:09,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:09,762 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:09,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:45:09,976 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash -359687607, now seen corresponding path program 6 times [2020-12-22 04:45:09,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:09,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141198550] [2020-12-22 04:45:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:10,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141198550] [2020-12-22 04:45:10,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732129075] [2020-12-22 04:45:10,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:10,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:45:10,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:10,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:45:10,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:10,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:10,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:45:10,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063693188] [2020-12-22 04:45:10,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:45:10,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:10,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:45:10,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:45:10,281 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 10 states. [2020-12-22 04:45:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:10,386 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-12-22 04:45:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:45:10,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-22 04:45:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:10,388 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:45:10,388 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:45:10,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:45:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:45:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2020-12-22 04:45:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:45:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-22 04:45:10,393 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2020-12-22 04:45:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:10,393 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-22 04:45:10,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:45:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-22 04:45:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:45:10,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:10,394 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:10,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:10,598 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash -2009173301, now seen corresponding path program 7 times [2020-12-22 04:45:10,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:10,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380029780] [2020-12-22 04:45:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:10,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380029780] [2020-12-22 04:45:10,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944428416] [2020-12-22 04:45:10,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:45:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:10,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:10,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:45:10,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932786084] [2020-12-22 04:45:10,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:45:10,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:45:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:45:10,893 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 11 states. [2020-12-22 04:45:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:11,035 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-12-22 04:45:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:45:11,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-12-22 04:45:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:11,037 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:45:11,037 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:45:11,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:45:11,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:45:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-12-22 04:45:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:45:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-22 04:45:11,055 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-12-22 04:45:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:11,055 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-22 04:45:11,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:45:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-22 04:45:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:45:11,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:11,056 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:11,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:11,269 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:11,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1972974285, now seen corresponding path program 8 times [2020-12-22 04:45:11,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:11,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288308716] [2020-12-22 04:45:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:11,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288308716] [2020-12-22 04:45:11,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803858122] [2020-12-22 04:45:11,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:11,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:11,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:11,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:45:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:11,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:11,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:45:11,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712934118] [2020-12-22 04:45:11,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:45:11,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:11,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:45:11,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:45:11,599 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 12 states. [2020-12-22 04:45:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:11,735 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-12-22 04:45:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:45:11,736 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-12-22 04:45:11,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:11,737 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:45:11,737 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:45:11,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:45:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:45:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-12-22 04:45:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:45:11,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-22 04:45:11,742 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 26 [2020-12-22 04:45:11,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:11,742 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-22 04:45:11,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:45:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-22 04:45:11,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:45:11,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:11,743 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:11,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 04:45:11,957 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:11,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2000943695, now seen corresponding path program 9 times [2020-12-22 04:45:11,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:11,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017900264] [2020-12-22 04:45:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:12,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017900264] [2020-12-22 04:45:12,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238575119] [2020-12-22 04:45:12,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:12,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 04:45:12,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:12,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:45:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:12,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:12,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:45:12,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753044608] [2020-12-22 04:45:12,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:45:12,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:12,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:45:12,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:45:12,343 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 13 states. [2020-12-22 04:45:12,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:12,518 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-12-22 04:45:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:45:12,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-22 04:45:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:12,519 INFO L225 Difference]: With dead ends: 74 [2020-12-22 04:45:12,519 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:45:12,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:45:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:45:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-12-22 04:45:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:45:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-22 04:45:12,524 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-12-22 04:45:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:12,524 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-22 04:45:12,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:45:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-22 04:45:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:45:12,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:12,525 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:12,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:12,730 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:12,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1185224367, now seen corresponding path program 10 times [2020-12-22 04:45:12,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:12,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119187274] [2020-12-22 04:45:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:12,926 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 04:45:12,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119187274] [2020-12-22 04:45:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795514303] [2020-12-22 04:45:12,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:12,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:45:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:13,052 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 04:45:13,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:13,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 04:45:13,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673992010] [2020-12-22 04:45:13,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:45:13,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:13,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:45:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:45:13,054 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 14 states. [2020-12-22 04:45:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:13,239 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2020-12-22 04:45:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:45:13,239 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-12-22 04:45:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:13,240 INFO L225 Difference]: With dead ends: 78 [2020-12-22 04:45:13,241 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:45:13,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:45:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:45:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2020-12-22 04:45:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:45:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-12-22 04:45:13,258 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2020-12-22 04:45:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:13,258 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-12-22 04:45:13,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:45:13,258 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-12-22 04:45:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:45:13,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:13,259 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:13,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:13,474 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash -781049901, now seen corresponding path program 11 times [2020-12-22 04:45:13,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:13,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474361981] [2020-12-22 04:45:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:13,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474361981] [2020-12-22 04:45:13,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662806207] [2020-12-22 04:45:13,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:13,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 04:45:13,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:13,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:45:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:14,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:14,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:45:14,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513560565] [2020-12-22 04:45:14,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:45:14,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:45:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:45:14,024 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 15 states. [2020-12-22 04:45:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:14,283 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-12-22 04:45:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:45:14,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-12-22 04:45:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:14,285 INFO L225 Difference]: With dead ends: 82 [2020-12-22 04:45:14,285 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:45:14,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:45:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:45:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-12-22 04:45:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:45:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-22 04:45:14,290 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 32 [2020-12-22 04:45:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:14,290 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-22 04:45:14,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:45:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-22 04:45:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:45:14,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:14,291 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:14,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 04:45:14,503 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1083555285, now seen corresponding path program 12 times [2020-12-22 04:45:14,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:14,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388617514] [2020-12-22 04:45:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:14,791 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 04:45:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388617514] [2020-12-22 04:45:14,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894944783] [2020-12-22 04:45:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:15,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:45:15,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:15,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:45:15,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:15,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 04:45:15,196 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 04:45:15,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:15,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2020-12-22 04:45:15,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139545367] [2020-12-22 04:45:15,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:45:15,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:15,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:45:15,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:45:15,199 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 17 states. [2020-12-22 04:45:15,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:15,477 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2020-12-22 04:45:15,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:45:15,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-12-22 04:45:15,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:15,479 INFO L225 Difference]: With dead ends: 86 [2020-12-22 04:45:15,479 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:45:15,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:45:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:45:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-12-22 04:45:15,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:45:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-12-22 04:45:15,484 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 34 [2020-12-22 04:45:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:15,484 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-12-22 04:45:15,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:45:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-12-22 04:45:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:45:15,485 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:15,486 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:15,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:45:15,691 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:15,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:15,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1967776599, now seen corresponding path program 13 times [2020-12-22 04:45:15,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:15,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958306704] [2020-12-22 04:45:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:15,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958306704] [2020-12-22 04:45:15,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986587703] [2020-12-22 04:45:15,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:16,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:45:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:16,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:16,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:45:16,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054133232] [2020-12-22 04:45:16,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:45:16,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:16,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:45:16,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:45:16,087 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 17 states. [2020-12-22 04:45:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:16,377 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2020-12-22 04:45:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:45:16,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-12-22 04:45:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:16,378 INFO L225 Difference]: With dead ends: 90 [2020-12-22 04:45:16,378 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:45:16,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:45:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:45:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-12-22 04:45:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:45:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-22 04:45:16,383 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 36 [2020-12-22 04:45:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:16,383 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-22 04:45:16,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:45:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-22 04:45:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:45:16,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:16,384 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:16,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:45:16,595 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:16,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:16,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1300934745, now seen corresponding path program 14 times [2020-12-22 04:45:16,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:16,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614960412] [2020-12-22 04:45:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614960412] [2020-12-22 04:45:16,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420854113] [2020-12-22 04:45:16,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:16,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:16,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:16,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:45:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:17,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:17,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:45:17,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438918047] [2020-12-22 04:45:17,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:45:17,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:17,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:45:17,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:45:17,054 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 18 states. [2020-12-22 04:45:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:17,416 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-12-22 04:45:17,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:45:17,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-12-22 04:45:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:17,417 INFO L225 Difference]: With dead ends: 94 [2020-12-22 04:45:17,417 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:45:17,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:45:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:45:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-12-22 04:45:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:45:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-22 04:45:17,433 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 38 [2020-12-22 04:45:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:17,433 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-22 04:45:17,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:45:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-22 04:45:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:45:17,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:17,438 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:17,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:17,652 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:17,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash 416040155, now seen corresponding path program 15 times [2020-12-22 04:45:17,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:17,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136931016] [2020-12-22 04:45:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136931016] [2020-12-22 04:45:18,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863052237] [2020-12-22 04:45:18,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:18,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 04:45:18,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:18,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:45:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:18,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:18,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:45:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009651745] [2020-12-22 04:45:18,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:45:18,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:18,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:45:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:45:18,555 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 19 states. [2020-12-22 04:45:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:18,913 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2020-12-22 04:45:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:45:18,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-12-22 04:45:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:18,914 INFO L225 Difference]: With dead ends: 98 [2020-12-22 04:45:18,914 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:45:18,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:45:18,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:45:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-12-22 04:45:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:45:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-22 04:45:18,919 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 40 [2020-12-22 04:45:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:18,919 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-22 04:45:18,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:45:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-22 04:45:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:45:18,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:18,920 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:19,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:45:19,124 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash 435863773, now seen corresponding path program 16 times [2020-12-22 04:45:19,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:19,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023969315] [2020-12-22 04:45:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:19,436 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:19,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023969315] [2020-12-22 04:45:19,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089669090] [2020-12-22 04:45:19,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:19,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:19,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:45:19,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:19,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:19,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 04:45:19,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279530310] [2020-12-22 04:45:19,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:45:19,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:45:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:45:19,602 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 20 states. [2020-12-22 04:45:20,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:20,018 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-12-22 04:45:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:45:20,019 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-12-22 04:45:20,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:20,020 INFO L225 Difference]: With dead ends: 102 [2020-12-22 04:45:20,020 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:45:20,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:45:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:45:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-12-22 04:45:20,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:45:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-22 04:45:20,025 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 42 [2020-12-22 04:45:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:20,025 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-22 04:45:20,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:45:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-22 04:45:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:45:20,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:20,026 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:20,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:45:20,240 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:20,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1988475809, now seen corresponding path program 17 times [2020-12-22 04:45:20,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:20,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960156144] [2020-12-22 04:45:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:20,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960156144] [2020-12-22 04:45:20,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439258485] [2020-12-22 04:45:20,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:21,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 04:45:21,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:21,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:45:21,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:21,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:21,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:45:21,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859320616] [2020-12-22 04:45:21,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:45:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:21,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:45:21,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:45:21,407 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 21 states. [2020-12-22 04:45:21,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:21,935 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2020-12-22 04:45:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:45:21,936 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-12-22 04:45:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:21,937 INFO L225 Difference]: With dead ends: 106 [2020-12-22 04:45:21,937 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:45:21,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 16 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:45:21,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:45:21,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-12-22 04:45:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:45:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-22 04:45:21,942 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2020-12-22 04:45:21,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:21,943 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-22 04:45:21,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:45:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-22 04:45:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:45:21,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:21,944 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:22,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:45:22,148 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 388427617, now seen corresponding path program 18 times [2020-12-22 04:45:22,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:22,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596416450] [2020-12-22 04:45:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:22,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596416450] [2020-12-22 04:45:22,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390931806] [2020-12-22 04:45:22,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:22,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:45:22,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:22,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:45:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:23,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:23,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:45:23,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639329705] [2020-12-22 04:45:23,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:45:23,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:23,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:45:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:45:23,075 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 22 states. [2020-12-22 04:45:23,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:23,640 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-12-22 04:45:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:45:23,641 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-12-22 04:45:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:23,641 INFO L225 Difference]: With dead ends: 110 [2020-12-22 04:45:23,641 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:45:23,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:45:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:45:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-12-22 04:45:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:45:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-12-22 04:45:23,646 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 46 [2020-12-22 04:45:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:23,647 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-12-22 04:45:23,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:45:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-12-22 04:45:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:45:23,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:23,648 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:23,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:23,858 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:23,859 INFO L82 PathProgramCache]: Analyzing trace with hash -329981469, now seen corresponding path program 19 times [2020-12-22 04:45:23,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:23,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106433004] [2020-12-22 04:45:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:24,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106433004] [2020-12-22 04:45:24,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675585972] [2020-12-22 04:45:24,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:24,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:45:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:24,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:24,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:45:24,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750996062] [2020-12-22 04:45:24,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:45:24,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:24,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:45:24,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:45:24,503 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 23 states. [2020-12-22 04:45:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:25,151 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2020-12-22 04:45:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:45:25,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2020-12-22 04:45:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:25,152 INFO L225 Difference]: With dead ends: 114 [2020-12-22 04:45:25,152 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 04:45:25,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:45:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 04:45:25,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2020-12-22 04:45:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:45:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-12-22 04:45:25,158 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 48 [2020-12-22 04:45:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:25,158 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-12-22 04:45:25,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:45:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-12-22 04:45:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:45:25,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:25,159 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:25,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:25,372 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 768621541, now seen corresponding path program 20 times [2020-12-22 04:45:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:25,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898545595] [2020-12-22 04:45:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:25,882 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 04:45:25,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898545595] [2020-12-22 04:45:25,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584353533] [2020-12-22 04:45:25,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:25,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:25,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:25,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:45:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:26,084 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 04:45:26,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:26,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:45:26,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077554347] [2020-12-22 04:45:26,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:45:26,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:45:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:45:26,088 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 24 states. [2020-12-22 04:45:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:26,782 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2020-12-22 04:45:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:45:26,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-12-22 04:45:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:26,787 INFO L225 Difference]: With dead ends: 118 [2020-12-22 04:45:26,788 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:45:26,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:45:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:45:26,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2020-12-22 04:45:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:45:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-12-22 04:45:26,792 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 50 [2020-12-22 04:45:26,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:26,792 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-12-22 04:45:26,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:45:26,792 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-12-22 04:45:26,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:45:26,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:26,793 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:27,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:45:27,007 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:27,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:27,007 INFO L82 PathProgramCache]: Analyzing trace with hash -35840665, now seen corresponding path program 21 times [2020-12-22 04:45:27,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:27,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050837740] [2020-12-22 04:45:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:27,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050837740] [2020-12-22 04:45:27,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056298043] [2020-12-22 04:45:27,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:28,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 04:45:28,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:45:28,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:28,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:28,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:45:28,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472526670] [2020-12-22 04:45:28,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:45:28,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:45:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:45:28,422 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 25 states. [2020-12-22 04:45:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:29,163 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2020-12-22 04:45:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:45:29,168 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-12-22 04:45:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:29,169 INFO L225 Difference]: With dead ends: 122 [2020-12-22 04:45:29,169 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 04:45:29,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:45:29,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 04:45:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2020-12-22 04:45:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:45:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-22 04:45:29,173 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 52 [2020-12-22 04:45:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:29,174 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-22 04:45:29,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:45:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-22 04:45:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:45:29,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:29,174 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:29,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 04:45:29,381 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash -29907351, now seen corresponding path program 22 times [2020-12-22 04:45:29,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:29,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512012498] [2020-12-22 04:45:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:29,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512012498] [2020-12-22 04:45:29,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163376682] [2020-12-22 04:45:29,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:29,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:29,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:45:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:30,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:30,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-22 04:45:30,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252280139] [2020-12-22 04:45:30,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:45:30,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:30,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:45:30,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:45:30,116 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 26 states. [2020-12-22 04:45:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:30,866 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-12-22 04:45:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:45:30,867 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-12-22 04:45:30,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:30,867 INFO L225 Difference]: With dead ends: 126 [2020-12-22 04:45:30,867 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 04:45:30,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:45:30,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 04:45:30,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-12-22 04:45:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:45:30,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-12-22 04:45:30,871 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2020-12-22 04:45:30,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:30,871 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-12-22 04:45:30,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:45:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-12-22 04:45:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:45:30,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:30,872 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:31,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:31,080 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1377040107, now seen corresponding path program 23 times [2020-12-22 04:45:31,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:31,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431411207] [2020-12-22 04:45:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:31,605 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:31,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431411207] [2020-12-22 04:45:31,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470144761] [2020-12-22 04:45:31,605 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 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 04:45:34,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 04:45:34,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:34,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:45:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:35,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:35,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:45:35,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028761360] [2020-12-22 04:45:35,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:45:35,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:35,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:45:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:45:35,446 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 27 states. [2020-12-22 04:45:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:36,349 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2020-12-22 04:45:36,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:45:36,350 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-12-22 04:45:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:36,351 INFO L225 Difference]: With dead ends: 130 [2020-12-22 04:45:36,351 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 04:45:36,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 23 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:45:36,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 04:45:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2020-12-22 04:45:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:45:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-12-22 04:45:36,354 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 56 [2020-12-22 04:45:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:36,354 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-12-22 04:45:36,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:45:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-12-22 04:45:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:45:36,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:36,355 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:36,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:45:36,556 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash 538849005, now seen corresponding path program 24 times [2020-12-22 04:45:36,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:36,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794848783] [2020-12-22 04:45:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:37,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794848783] [2020-12-22 04:45:37,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848740872] [2020-12-22 04:45:37,169 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 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 04:45:39,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:45:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:39,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:45:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:39,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:39,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:45:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610826631] [2020-12-22 04:45:39,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:45:39,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:39,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:45:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:45:39,554 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 28 states. [2020-12-22 04:45:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:40,560 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2020-12-22 04:45:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:45:40,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-12-22 04:45:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:40,561 INFO L225 Difference]: With dead ends: 134 [2020-12-22 04:45:40,562 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 04:45:40,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:45:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 04:45:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-12-22 04:45:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:45:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-12-22 04:45:40,565 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 58 [2020-12-22 04:45:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:40,565 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-12-22 04:45:40,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:45:40,566 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-12-22 04:45:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:45:40,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:40,566 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:40,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:40,770 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:40,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1803915665, now seen corresponding path program 25 times [2020-12-22 04:45:40,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:40,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592338751] [2020-12-22 04:45:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:41,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592338751] [2020-12-22 04:45:41,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359882418] [2020-12-22 04:45:41,366 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 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 04:45:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:41,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:45:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:41,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:41,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:45:41,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530062593] [2020-12-22 04:45:41,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:45:41,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:41,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:45:41,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:45:41,557 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 29 states. [2020-12-22 04:45:42,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:42,641 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-12-22 04:45:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:45:42,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-12-22 04:45:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:42,642 INFO L225 Difference]: With dead ends: 138 [2020-12-22 04:45:42,642 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 04:45:42,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:45:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 04:45:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-12-22 04:45:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:45:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-12-22 04:45:42,645 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 60 [2020-12-22 04:45:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:42,645 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-12-22 04:45:42,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:45:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-12-22 04:45:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:45:42,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:42,646 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:42,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:45:42,847 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:42,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1657066865, now seen corresponding path program 26 times [2020-12-22 04:45:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:42,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350838326] [2020-12-22 04:45:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:43,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350838326] [2020-12-22 04:45:43,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520050919] [2020-12-22 04:45:43,592 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 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 04:45:43,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:43,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:43,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:45:43,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:43,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:43,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-22 04:45:43,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437563461] [2020-12-22 04:45:43,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:45:43,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:43,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:45:43,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:45:43,780 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 30 states. [2020-12-22 04:45:44,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:44,925 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-12-22 04:45:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:45:44,925 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 62 [2020-12-22 04:45:44,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:44,926 INFO L225 Difference]: With dead ends: 142 [2020-12-22 04:45:44,926 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 04:45:44,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:45:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 04:45:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-12-22 04:45:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 04:45:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-12-22 04:45:44,930 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 62 [2020-12-22 04:45:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:44,930 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-12-22 04:45:44,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:45:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-12-22 04:45:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:45:44,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:44,931 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:45,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:45:45,139 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash -938376205, now seen corresponding path program 27 times [2020-12-22 04:45:45,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:45,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139581420] [2020-12-22 04:45:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:45,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139581420] [2020-12-22 04:45:45,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937751222] [2020-12-22 04:45:45,938 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 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 04:45:46,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 04:45:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:45:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:47,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:47,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-22 04:45:47,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763443102] [2020-12-22 04:45:47,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:45:47,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:45:47,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:45:47,118 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 31 states. [2020-12-22 04:45:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:48,346 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-12-22 04:45:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:45:48,346 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 64 [2020-12-22 04:45:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:48,347 INFO L225 Difference]: With dead ends: 146 [2020-12-22 04:45:48,347 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 04:45:48,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:45:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 04:45:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-12-22 04:45:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 04:45:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-12-22 04:45:48,350 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 64 [2020-12-22 04:45:48,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:48,351 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-12-22 04:45:48,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:45:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-12-22 04:45:48,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:45:48,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:48,351 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:48,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:45:48,555 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:48,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:48,556 INFO L82 PathProgramCache]: Analyzing trace with hash 216832501, now seen corresponding path program 28 times [2020-12-22 04:45:48,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:48,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674766991] [2020-12-22 04:45:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:49,386 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 04:45:49,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674766991] [2020-12-22 04:45:49,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941565246] [2020-12-22 04:45:49,386 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 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 04:45:49,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:49,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:49,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:45:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:49,588 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 04:45:49,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:49,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-22 04:45:49,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885486511] [2020-12-22 04:45:49,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:45:49,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:49,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:45:49,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:45:49,590 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 32 states. [2020-12-22 04:45:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:50,880 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2020-12-22 04:45:50,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:45:50,881 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2020-12-22 04:45:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:50,882 INFO L225 Difference]: With dead ends: 150 [2020-12-22 04:45:50,882 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 04:45:50,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:45:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 04:45:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-12-22 04:45:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 04:45:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-12-22 04:45:50,887 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 66 [2020-12-22 04:45:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:50,887 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-12-22 04:45:50,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:45:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-12-22 04:45:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 04:45:50,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:50,888 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:51,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:45:51,101 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:51,102 INFO L82 PathProgramCache]: Analyzing trace with hash -2024130697, now seen corresponding path program 29 times [2020-12-22 04:45:51,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:51,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076424802] [2020-12-22 04:45:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:51,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076424802] [2020-12-22 04:45:51,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169232536] [2020-12-22 04:45:51,943 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 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 04:46:00,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 04:46:00,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:00,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-22 04:46:00,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:00,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:00,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-22 04:46:00,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258896146] [2020-12-22 04:46:00,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:46:00,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:00,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:46:00,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:46:00,979 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 33 states. [2020-12-22 04:46:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:02,300 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2020-12-22 04:46:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:46:02,301 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 68 [2020-12-22 04:46:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:02,302 INFO L225 Difference]: With dead ends: 154 [2020-12-22 04:46:02,302 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:46:02,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 24 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:46:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:46:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2020-12-22 04:46:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 04:46:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-12-22 04:46:02,306 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 68 [2020-12-22 04:46:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:02,306 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-12-22 04:46:02,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:46:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-12-22 04:46:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 04:46:02,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:02,307 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:02,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:02,512 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:02,513 INFO L82 PathProgramCache]: Analyzing trace with hash 483818617, now seen corresponding path program 30 times [2020-12-22 04:46:02,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:02,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001952733] [2020-12-22 04:46:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:03,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001952733] [2020-12-22 04:46:03,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116418534] [2020-12-22 04:46:03,309 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 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 04:46:05,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:46:05,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:05,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 04:46:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:05,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:05,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-22 04:46:05,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361272207] [2020-12-22 04:46:05,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:46:05,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:46:05,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:46:05,769 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 34 states. [2020-12-22 04:46:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:07,192 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2020-12-22 04:46:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:46:07,193 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 70 [2020-12-22 04:46:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:07,193 INFO L225 Difference]: With dead ends: 158 [2020-12-22 04:46:07,193 INFO L226 Difference]: Without dead ends: 85 [2020-12-22 04:46:07,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:46:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-22 04:46:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-12-22 04:46:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 04:46:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-12-22 04:46:07,198 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 70 [2020-12-22 04:46:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:07,199 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-12-22 04:46:07,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:46:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-12-22 04:46:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 04:46:07,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:07,199 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:07,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:07,401 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:07,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1146456315, now seen corresponding path program 31 times [2020-12-22 04:46:07,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:07,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366701367] [2020-12-22 04:46:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:08,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366701367] [2020-12-22 04:46:08,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353527951] [2020-12-22 04:46:08,422 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 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 04:46:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 04:46:08,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:08,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:08,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-22 04:46:08,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233851304] [2020-12-22 04:46:08,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:46:08,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:08,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:46:08,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:46:08,616 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 35 states. [2020-12-22 04:46:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:10,134 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2020-12-22 04:46:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:46:10,135 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 72 [2020-12-22 04:46:10,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:10,136 INFO L225 Difference]: With dead ends: 162 [2020-12-22 04:46:10,137 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 04:46:10,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:46:10,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 04:46:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2020-12-22 04:46:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 04:46:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-12-22 04:46:10,141 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 72 [2020-12-22 04:46:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:10,142 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-12-22 04:46:10,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:46:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-12-22 04:46:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 04:46:10,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:10,142 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:10,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:10,355 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2008843011, now seen corresponding path program 32 times [2020-12-22 04:46:10,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:10,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818211919] [2020-12-22 04:46:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:11,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818211919] [2020-12-22 04:46:11,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898692839] [2020-12-22 04:46:11,453 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 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 04:46:11,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:46:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 04:46:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:11,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:11,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-22 04:46:11,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331035687] [2020-12-22 04:46:11,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:46:11,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:46:11,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:46:11,683 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 36 states. [2020-12-22 04:46:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:13,373 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2020-12-22 04:46:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:46:13,374 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-12-22 04:46:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:13,376 INFO L225 Difference]: With dead ends: 166 [2020-12-22 04:46:13,376 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 04:46:13,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:46:13,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 04:46:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-12-22 04:46:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 04:46:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-12-22 04:46:13,381 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2020-12-22 04:46:13,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:13,381 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-12-22 04:46:13,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:46:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-12-22 04:46:13,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 04:46:13,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:13,381 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:13,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 04:46:13,582 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2004584321, now seen corresponding path program 33 times [2020-12-22 04:46:13,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:13,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621610654] [2020-12-22 04:46:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621610654] [2020-12-22 04:46:14,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573009116] [2020-12-22 04:46:14,701 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 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 04:46:15,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:46:15,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:15,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-22 04:46:15,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:16,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:16,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-22 04:46:16,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067466661] [2020-12-22 04:46:16,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:46:16,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:16,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:46:16,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:46:16,721 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 37 states. [2020-12-22 04:46:18,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:18,498 INFO L93 Difference]: Finished difference Result 170 states and 182 transitions. [2020-12-22 04:46:18,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:46:18,499 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 76 [2020-12-22 04:46:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:18,499 INFO L225 Difference]: With dead ends: 170 [2020-12-22 04:46:18,499 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 04:46:18,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:46:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 04:46:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-12-22 04:46:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 04:46:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-12-22 04:46:18,503 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 76 [2020-12-22 04:46:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:18,504 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-12-22 04:46:18,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:46:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-12-22 04:46:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 04:46:18,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:18,504 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:18,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:18,708 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2088016769, now seen corresponding path program 34 times [2020-12-22 04:46:18,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:18,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649330918] [2020-12-22 04:46:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:19,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649330918] [2020-12-22 04:46:19,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548009986] [2020-12-22 04:46:19,887 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 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 04:46:19,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:46:19,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:19,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 04:46:19,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:20,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:20,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-22 04:46:20,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827710564] [2020-12-22 04:46:20,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:46:20,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:46:20,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:46:20,121 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 38 states. [2020-12-22 04:46:21,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:21,999 INFO L93 Difference]: Finished difference Result 174 states and 186 transitions. [2020-12-22 04:46:21,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:46:21,999 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 78 [2020-12-22 04:46:22,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:22,000 INFO L225 Difference]: With dead ends: 174 [2020-12-22 04:46:22,000 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 04:46:22,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:46:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 04:46:22,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2020-12-22 04:46:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 04:46:22,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-12-22 04:46:22,005 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 78 [2020-12-22 04:46:22,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:22,005 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-12-22 04:46:22,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:46:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-12-22 04:46:22,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 04:46:22,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:22,006 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:22,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 04:46:22,221 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash 887621123, now seen corresponding path program 35 times [2020-12-22 04:46:22,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:22,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182019688] [2020-12-22 04:46:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:23,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182019688] [2020-12-22 04:46:23,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428294318] [2020-12-22 04:46:23,448 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 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 04:46:45,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 04:46:45,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:45,859 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 108 conjunts are in the unsatisfiable core [2020-12-22 04:46:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:47,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:47,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-22 04:46:47,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927503646] [2020-12-22 04:46:47,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:46:47,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:47,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:46:47,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:46:47,196 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 39 states. [2020-12-22 04:46:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:49,132 INFO L93 Difference]: Finished difference Result 178 states and 190 transitions. [2020-12-22 04:46:49,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:46:49,133 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 80 [2020-12-22 04:46:49,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:49,134 INFO L225 Difference]: With dead ends: 178 [2020-12-22 04:46:49,134 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 04:46:49,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 36 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:46:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 04:46:49,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-12-22 04:46:49,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 04:46:49,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-12-22 04:46:49,139 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 80 [2020-12-22 04:46:49,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:49,139 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-12-22 04:46:49,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:46:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-12-22 04:46:49,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 04:46:49,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:49,140 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:49,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:49,345 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:49,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1641359355, now seen corresponding path program 36 times [2020-12-22 04:46:49,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:49,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447508155] [2020-12-22 04:46:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:50,547 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 04:46:50,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447508155] [2020-12-22 04:46:50,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897871530] [2020-12-22 04:46:50,547 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 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 04:46:56,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 04:46:56,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:56,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:46:56,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:57,163 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 04:46:57,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:57,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-22 04:46:57,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006382711] [2020-12-22 04:46:57,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:46:57,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:57,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:46:57,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:46:57,165 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 40 states. [2020-12-22 04:46:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:59,208 INFO L93 Difference]: Finished difference Result 182 states and 194 transitions. [2020-12-22 04:46:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:46:59,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 82 [2020-12-22 04:46:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:59,209 INFO L225 Difference]: With dead ends: 182 [2020-12-22 04:46:59,209 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 04:46:59,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:46:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 04:46:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2020-12-22 04:46:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 04:46:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-12-22 04:46:59,214 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 82 [2020-12-22 04:46:59,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:59,214 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-12-22 04:46:59,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:46:59,214 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-12-22 04:46:59,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 04:46:59,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:59,215 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:59,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:46:59,415 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:59,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1040109177, now seen corresponding path program 37 times [2020-12-22 04:46:59,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:59,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187169373] [2020-12-22 04:46:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:00,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187169373] [2020-12-22 04:47:00,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252876453] [2020-12-22 04:47:00,603 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 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 04:47:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:00,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 04:47:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:00,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:47:00,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-22 04:47:00,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20773422] [2020-12-22 04:47:00,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:47:00,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:00,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:47:00,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:47:00,844 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 41 states. [2020-12-22 04:47:03,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:03,063 INFO L93 Difference]: Finished difference Result 186 states and 198 transitions. [2020-12-22 04:47:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:47:03,066 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 84 [2020-12-22 04:47:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:03,067 INFO L225 Difference]: With dead ends: 186 [2020-12-22 04:47:03,067 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 04:47:03,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:47:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 04:47:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-12-22 04:47:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 04:47:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-12-22 04:47:03,072 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2020-12-22 04:47:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:03,072 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-12-22 04:47:03,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:47:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-12-22 04:47:03,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 04:47:03,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:03,073 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:03,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:47:03,286 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:03,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:03,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1235694217, now seen corresponding path program 38 times [2020-12-22 04:47:03,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:03,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577898456] [2020-12-22 04:47:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:04,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577898456] [2020-12-22 04:47:04,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459066424] [2020-12-22 04:47:04,630 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 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 04:47:04,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:47:04,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:04,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 04:47:04,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:04,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:47:04,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-22 04:47:04,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875343041] [2020-12-22 04:47:04,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:47:04,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:04,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:47:04,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:47:04,890 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 42 states. [2020-12-22 04:47:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:07,230 INFO L93 Difference]: Finished difference Result 190 states and 202 transitions. [2020-12-22 04:47:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:47:07,230 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 86 [2020-12-22 04:47:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:07,231 INFO L225 Difference]: With dead ends: 190 [2020-12-22 04:47:07,231 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 04:47:07,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:47:07,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 04:47:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2020-12-22 04:47:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 04:47:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-12-22 04:47:07,235 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 86 [2020-12-22 04:47:07,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:07,236 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-12-22 04:47:07,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:47:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-12-22 04:47:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 04:47:07,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:07,237 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:07,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:47:07,440 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2144402187, now seen corresponding path program 39 times [2020-12-22 04:47:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:07,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287799860] [2020-12-22 04:47:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:08,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287799860] [2020-12-22 04:47:08,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941619964] [2020-12-22 04:47:08,790 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 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 04:47:10,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 04:47:10,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:10,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-22 04:47:10,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:11,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:47:11,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-22 04:47:11,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153584253] [2020-12-22 04:47:11,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:47:11,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:11,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:47:11,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:47:11,757 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 43 states. [2020-12-22 04:47:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:14,179 INFO L93 Difference]: Finished difference Result 194 states and 206 transitions. [2020-12-22 04:47:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:47:14,180 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 88 [2020-12-22 04:47:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:14,180 INFO L225 Difference]: With dead ends: 194 [2020-12-22 04:47:14,180 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 04:47:14,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 76 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:47:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 04:47:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-12-22 04:47:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-22 04:47:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-12-22 04:47:14,184 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 88 [2020-12-22 04:47:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:14,185 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-12-22 04:47:14,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:47:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-12-22 04:47:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-22 04:47:14,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:14,186 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:14,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:47:14,388 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash -760567027, now seen corresponding path program 40 times [2020-12-22 04:47:14,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:14,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57853849] [2020-12-22 04:47:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:15,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57853849] [2020-12-22 04:47:15,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017693767] [2020-12-22 04:47:15,941 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 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 04:47:16,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:47:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 04:47:16,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:16,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:47:16,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-22 04:47:16,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539454912] [2020-12-22 04:47:16,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:47:16,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:47:16,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:47:16,174 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 44 states. [2020-12-22 04:47:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:18,750 INFO L93 Difference]: Finished difference Result 198 states and 210 transitions. [2020-12-22 04:47:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:47:18,751 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 90 [2020-12-22 04:47:18,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:18,752 INFO L225 Difference]: With dead ends: 198 [2020-12-22 04:47:18,752 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 04:47:18,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:47:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 04:47:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-12-22 04:47:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 04:47:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-12-22 04:47:18,758 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 90 [2020-12-22 04:47:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:18,758 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-12-22 04:47:18,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:47:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-12-22 04:47:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-22 04:47:18,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:18,759 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:18,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:47:18,972 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash -707239281, now seen corresponding path program 41 times [2020-12-22 04:47:18,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:18,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529545264] [2020-12-22 04:47:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:20,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529545264] [2020-12-22 04:47:20,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754032287] [2020-12-22 04:47:20,483 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 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 04:48:09,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 04:48:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:09,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-22 04:48:09,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:10,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:10,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-22 04:48:10,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380795415] [2020-12-22 04:48:10,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:48:10,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:10,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:48:10,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:48:10,863 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 45 states. [2020-12-22 04:48:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:13,488 INFO L93 Difference]: Finished difference Result 202 states and 214 transitions. [2020-12-22 04:48:13,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:48:13,488 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 92 [2020-12-22 04:48:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:13,489 INFO L225 Difference]: With dead ends: 202 [2020-12-22 04:48:13,489 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 04:48:13,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 52 SyntacticMatches, 41 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:48:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 04:48:13,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-12-22 04:48:13,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 04:48:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-12-22 04:48:13,494 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 92 [2020-12-22 04:48:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:13,494 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-12-22 04:48:13,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:48:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-12-22 04:48:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 04:48:13,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:13,495 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:13,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 04:48:13,701 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash -998882927, now seen corresponding path program 42 times [2020-12-22 04:48:13,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:13,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312195186] [2020-12-22 04:48:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:15,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312195186] [2020-12-22 04:48:15,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120358760] [2020-12-22 04:48:15,332 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 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 04:48:19,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 04:48:19,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-22 04:48:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:19,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:19,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-22 04:48:19,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866363809] [2020-12-22 04:48:19,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:48:19,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:48:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:48:19,851 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 46 states. [2020-12-22 04:48:22,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:22,688 INFO L93 Difference]: Finished difference Result 206 states and 218 transitions. [2020-12-22 04:48:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:48:22,694 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 94 [2020-12-22 04:48:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:22,695 INFO L225 Difference]: With dead ends: 206 [2020-12-22 04:48:22,695 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 04:48:22,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:48:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 04:48:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-12-22 04:48:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-22 04:48:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-12-22 04:48:22,700 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 94 [2020-12-22 04:48:22,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:22,701 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-12-22 04:48:22,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:48:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-12-22 04:48:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 04:48:22,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:22,702 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:22,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:22,908 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:22,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2095552493, now seen corresponding path program 43 times [2020-12-22 04:48:22,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:22,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441650719] [2020-12-22 04:48:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:24,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441650719] [2020-12-22 04:48:24,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457697965] [2020-12-22 04:48:24,676 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 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 04:48:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:24,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 04:48:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:24,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:24,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-22 04:48:24,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102165901] [2020-12-22 04:48:24,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:48:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:24,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:48:24,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:48:24,945 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 47 states. [2020-12-22 04:48:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:27,924 INFO L93 Difference]: Finished difference Result 210 states and 222 transitions. [2020-12-22 04:48:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:48:27,925 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 96 [2020-12-22 04:48:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:27,925 INFO L225 Difference]: With dead ends: 210 [2020-12-22 04:48:27,925 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 04:48:27,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:48:27,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 04:48:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-12-22 04:48:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 04:48:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-12-22 04:48:27,930 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 96 [2020-12-22 04:48:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:27,931 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-12-22 04:48:27,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:48:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-12-22 04:48:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 04:48:27,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:27,932 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:28,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:28,145 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash 566949397, now seen corresponding path program 44 times [2020-12-22 04:48:28,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:28,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006962933] [2020-12-22 04:48:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:29,818 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 04:48:29,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006962933] [2020-12-22 04:48:29,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137592759] [2020-12-22 04:48:29,819 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 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 [2020-12-22 04:48:29,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:29,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:29,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 04:48:29,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:30,112 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 04:48:30,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:30,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-22 04:48:30,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269589045] [2020-12-22 04:48:30,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:48:30,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:48:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:48:30,114 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 48 states. [2020-12-22 04:48:33,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:33,186 INFO L93 Difference]: Finished difference Result 214 states and 226 transitions. [2020-12-22 04:48:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:48:33,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 98 [2020-12-22 04:48:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:33,190 INFO L225 Difference]: With dead ends: 214 [2020-12-22 04:48:33,191 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 04:48:33,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:48:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 04:48:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2020-12-22 04:48:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-22 04:48:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-12-22 04:48:33,195 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 98 [2020-12-22 04:48:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:33,195 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-12-22 04:48:33,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:48:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-12-22 04:48:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 04:48:33,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:33,196 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:33,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 04:48:33,410 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:33,410 INFO L82 PathProgramCache]: Analyzing trace with hash -569242729, now seen corresponding path program 45 times [2020-12-22 04:48:33,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:33,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373985204] [2020-12-22 04:48:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:35,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373985204] [2020-12-22 04:48:35,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852815390] [2020-12-22 04:48:35,315 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:39,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 04:48:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:39,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 102 conjunts are in the unsatisfiable core [2020-12-22 04:48:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:40,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:40,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-22 04:48:40,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765156623] [2020-12-22 04:48:40,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:48:40,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:40,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:48:40,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:48:40,640 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 49 states. [2020-12-22 04:48:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:43,923 INFO L93 Difference]: Finished difference Result 218 states and 230 transitions. [2020-12-22 04:48:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:48:43,925 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 100 [2020-12-22 04:48:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:43,925 INFO L225 Difference]: With dead ends: 218 [2020-12-22 04:48:43,926 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 04:48:43,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:48:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 04:48:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-12-22 04:48:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 04:48:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-12-22 04:48:43,930 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 100 [2020-12-22 04:48:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:43,930 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-12-22 04:48:43,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:48:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-12-22 04:48:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:48:43,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:43,931 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:44,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:48:44,136 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:44,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:44,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1528182631, now seen corresponding path program 46 times [2020-12-22 04:48:44,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:44,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703142852] [2020-12-22 04:48:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703142852] [2020-12-22 04:48:46,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901222310] [2020-12-22 04:48:46,191 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:46,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:46,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:46,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-22 04:48:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:46,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:46,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-22 04:48:46,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316172206] [2020-12-22 04:48:46,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:48:46,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:48:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:48:46,472 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 50 states. [2020-12-22 04:48:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:49,899 INFO L93 Difference]: Finished difference Result 222 states and 234 transitions. [2020-12-22 04:48:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:48:49,900 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 102 [2020-12-22 04:48:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:49,901 INFO L225 Difference]: With dead ends: 222 [2020-12-22 04:48:49,901 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 04:48:49,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:48:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 04:48:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2020-12-22 04:48:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 04:48:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-12-22 04:48:49,906 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 102 [2020-12-22 04:48:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:49,906 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-12-22 04:48:49,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:48:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-12-22 04:48:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 04:48:49,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:49,907 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:50,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 04:48:50,116 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:50,116 INFO L82 PathProgramCache]: Analyzing trace with hash 348540187, now seen corresponding path program 47 times [2020-12-22 04:48:50,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:50,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573164640] [2020-12-22 04:48:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:52,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573164640] [2020-12-22 04:48:52,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175006853] [2020-12-22 04:48:52,228 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true